Nusoap_base

Complexity

Total Complexity

134

Size/Duplication

Total Lines	857
Duplicated Lines	0 %

Importance

Changes	2
Bugs	0	Features	0

26 Methods

Rating	Name	Duplication	Size	Complexity
A	getDebug()	0	5	1
A	clearDebug()	0	5	1
A	appendDebug()	0	6	2
A	setDebugLevel()	0	3	1
A	isArraySimpleOrStruct()	0	10	3
A	expandEntities()	0	11	2
A	setError()	0	3	1
A	setGlobalDebugLevel()	0	3	1
A	getDebugLevel()	0	3	1
A	__construct()	0	3	1
A	getError()	0	7	2
A	getGlobalDebugLevel()	0	3	1
A	getDebugAsXMLComment()	0	10	2
A	debug()	0	4	2
A	getPrefixFromNamespace()	0	11	4
A	getPrefix()	0	8	2
C	serializeEnvelope()	0	38	8
A	contractQName()	0	18	3
F	serialize_val()	0	261	83
A	getLocalPart()	0	8	2
A	__toString()	0	3	1
A	getNamespaceFromPrefix()	0	7	2
A	varDump()	0	8	1
A	expandQname()	0	16	4
A	formatDump()	0	5	1
A	getmicrotime()	0	12	2

<?php

//declare(strict_types=1);

/*

NuSOAP - Web Services Toolkit for PHP

Copyright (c) 2002 NuSphere Corporation

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

The NuSOAP project home is:
http://sourceforge.net/projects/nusoap/

The primary support for NuSOAP is the Help forum on the project home page.

If you have any questions or comments, please email:

Dietrich Ayala
dietrich@ganx4.com
http://dietrich.ganx4.com/nusoap

NuSphere Corporation
http://www.nusphere.com

*/

/*
 *	Some of the standards implmented in whole or part by NuSOAP:
 *
 *	SOAP 1.1 (http://www.w3.org/TR/2000/NOTE-SOAP-20000508/)
 *	WSDL 1.1 (http://www.w3.org/TR/2001/NOTE-wsdl-20010315)
 *	SOAP Messages With Attachments (http://www.w3.org/TR/SOAP-attachments)
 *	XML 1.0 (http://www.w3.org/TR/2006/REC-xml-20060816/)
 *	Namespaces in XML 1.0 (http://www.w3.org/TR/2006/REC-xml-names-20060816/)
 *	XML Schema 1.0 (http://www.w3.org/TR/xmlschema-0/)
 *	RFC 2045 Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies
 *	RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1
 *	RFC 2617 HTTP Authentication: Basic and Digest Access Authentication
 */

/* load classes

// necessary classes
require_once('class.soapclient.php');
require_once('class.soap_val.php');
require_once('class.soap_parser.php');
require_once('class.soap_fault.php');

// transport classes
require_once('class.soap_transport_http.php');

// optional add-on classes
require_once('class.xmlschema.php');
require_once('class.wsdl.php');

// server class
require_once('class.soap_server.php');*/

// class variable emulation
// cf. http://www.webkreator.com/php/techniques/php-static-class-variables.html
$GLOBALS['_transient']['static']['nusoap_base']['globalDebugLevel'] = 9;

/**
 * Nusoap_base
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @author   Scott Nichol <snichol@users.sourceforge.net>
 */
class Nusoap_base
{
    /**
     * Identification for HTTP headers.
     *
     * @var string
     */
    protected $title = 'NuSOAP';
    /**
     * Version for HTTP headers.
     *
     * @var string
     */
    protected $version = '0.9.6';
    /**
     * CVS revision for HTTP headers.
     *
     * @var string
     */
    protected $revision = '$Revision: 1.123 $';
    /**
     * Current error string (manipulated by getError/setError)
     *
     * @var string
     */
    protected $error_str = '';
    /**
     * Current debug string (manipulated by debug/appendDebug/clearDebug/getDebug/getDebugAsXMLComment)
     *
     * @var string
     */
    private $debug_str = '';
    /**
     * Toggles automatic encoding of special characters as entities
     * (should always be true, I think)
     *
     * @var bool
     */
    private $charencoding = true;
    /**
     * The debug level for this instance
     *
     * @var    int
     */
    private $debugLevel;
    /**
     * Set schema version
     *
     * @var      string
     */
    public $XMLSchemaVersion = 'http://www.w3.org/2001/XMLSchema';
    /**
     * Charset encoding for outgoing messages
     *
     * @var      string
     */
    public $soap_defencoding = 'ISO-8859-1';
    //var $soap_defencoding = 'UTF-8';

    /**
     * Namespaces in an array of prefix => uri
     *
     * This is "seeded" by a set of constants, but it may be altered by code
     *
     * @var      array
     */
    public $namespaces = [
        'SOAP-ENV' => 'http://schemas.xmlsoap.org/soap/envelope/',
        'xsd'      => 'http://www.w3.org/2001/XMLSchema',
        'xsi'      => 'http://www.w3.org/2001/XMLSchema-instance',
        'SOAP-ENC' => 'http://schemas.xmlsoap.org/soap/encoding/',
    ];
    /**
     * Namespaces used in the current context, e.g. during serialization
     *
     * @var      array
     */
    protected $usedNamespaces = [];
    /**
     * XML Schema types in an array of uri => (array of xml type => php type)
     * is this legacy yet?
     * no, this is used by the nusoap_xmlschema class to verify type => namespace mappings.
     *
     * @var      array
     */
    public $typemap = [
        'http://www.w3.org/2001/XMLSchema'          => [
            'string'             => 'string',
            'boolean'            => 'boolean',
            'float'              => 'double',
            'double'             => 'double',
            'decimal'            => 'double',
            'duration'           => '',
            'dateTime'           => 'string',
            'time'               => 'string',
            'date'               => 'string',
            'gYearMonth'         => '',
            'gYear'              => '',
            'gMonthDay'          => '',
            'gDay'               => '',
            'gMonth'             => '',
            'hexBinary'          => 'string',
            'base64Binary'       => 'string',
            // abstract "any" types
            'anyType'            => 'string',
            'anySimpleType'      => 'string',
            // derived datatypes
            'normalizedString'   => 'string',
            'token'              => 'string',
            'language'           => '',
            'NMTOKEN'            => '',
            'NMTOKENS'           => '',
            'Name'               => '',
            'NCName'             => '',
            'ID'                 => '',
            'IDREF'              => '',
            'IDREFS'             => '',
            'ENTITY'             => '',
            'ENTITIES'           => '',
            'integer'            => 'integer',
            'nonPositiveInteger' => 'integer',
            'negativeInteger'    => 'integer',
            'long'               => 'integer',
            'int'                => 'integer',
            'short'              => 'integer',
            'byte'               => 'integer',
            'nonNegativeInteger' => 'integer',
            'unsignedLong'       => '',
            'unsignedInt'        => '',
            'unsignedShort'      => '',
            'unsignedByte'       => '',
            'positiveInteger'    => '',
        ],
        'http://www.w3.org/2000/10/XMLSchema'       => [
            'i4'           => '',
            'int'          => 'integer',
            'boolean'      => 'boolean',
            'string'       => 'string',
            'double'       => 'double',
            'float'        => 'double',
            'dateTime'     => 'string',
            'timeInstant'  => 'string',
            'base64Binary' => 'string',
            'base64'       => 'string',
            'ur-type'      => 'array',
        ],
        'http://www.w3.org/1999/XMLSchema'          => [
            'i4'           => '',
            'int'          => 'integer',
            'boolean'      => 'boolean',
            'string'       => 'string',
            'double'       => 'double',
            'float'        => 'double',
            'dateTime'     => 'string',
            'timeInstant'  => 'string',
            'base64Binary' => 'string',
            'base64'       => 'string',
            'ur-type'      => 'array',
        ],
        'http://soapinterop.org/xsd'                => ['SOAPStruct' => 'struct'],
        'http://schemas.xmlsoap.org/soap/encoding/' => ['base64' => 'string', 'array' => 'array', 'Array' => 'array'],
        'http://xml.apache.org/xml-soap'            => ['Map'],
    ];
    /**
     * XML entities to convert
     *
     * @var      array
     * @deprecated
     * @see      expandEntities
     */
    public $xmlEntities = [
        'quot' => '"',
        'amp'  => '&',
        'lt'   => '<',
        'gt'   => '>',
        'apos' => "'",
    ];

    /**
     * Constructor
     */
    public function __construct()
    {
        $this->debugLevel = $GLOBALS['_transient']['static']['Nusoap_base']['globalDebugLevel'];
    }

    /**
     * Gets the global debug level, which applies to future instances
     *
     * @return    int    Debug level 0-9, where 0 turns off
     */
    public function getGlobalDebugLevel()
    {
        return $GLOBALS['_transient']['static']['Nusoap_base']['globalDebugLevel'];
    }

    /**
     * Sets the global debug level, which applies to future instances
     *
     * @param    int $level Debug level 0-9, where 0 turns off
     */
    public function setGlobalDebugLevel($level)
    {
        $GLOBALS['_transient']['static']['Nusoap_base']['globalDebugLevel'] = $level;
    }

    /**
     * Gets the debug level for this instance
     *
     * @return    int    Debug level 0-9, where 0 turns off
     */
    public function getDebugLevel()
    {
        return $this->debugLevel;
    }

    /**
     * Sets the debug level for this instance
     *
     * @param    int $level Debug level 0-9, where 0 turns off
     */
    public function setDebugLevel($level)
    {
        $this->debugLevel = $level;
    }

    /**
     * Adds debug data to the instance debug string with formatting
     *
     * @param    string $string debug data
     */
    protected function debug($string)
    {
        if ($this->debugLevel > 0) {
            $this->appendDebug($this->getmicrotime() . ' ' . get_class($this) . ": $string\n");
        }
    }

    /**
     * Adds debug data to the instance debug string without formatting
     *
     * @param    string $string debug data
     */
    public function appendDebug($string)
    {
        if ($this->debugLevel > 0) {
            // it would be nice to use a memory stream here to use
            // memory more efficiently
            $this->debug_str .= $string;
        }
    }

    /**
     * Clears the current debug data for this instance
     */
    public function clearDebug()
    {
        // it would be nice to use a memory stream here to use
        // memory more efficiently
        $this->debug_str = '';
    }

    /**
     * Gets the current debug data for this instance
     *
     * @return   string debug data
     */
    public function &getDebug()
    {
        // it would be nice to use a memory stream here to use
        // memory more efficiently
        return $this->debug_str;
    }

    /**
     * Gets the current debug data for this instance as an XML comment
     * this may change the contents of the debug data
     *
     * @return   string debug data as an XML comment
     */
    public function &getDebugAsXMLComment()
    {
        // it would be nice to use a memory stream here to use
        // memory more efficiently
        while (mb_strpos($this->debug_str, '--')) {
            $this->debug_str = str_replace('--', '- -', $this->debug_str);
        }
        $ret = "<!--\n" . $this->debug_str . "\n-->";

        return $ret;
    }

    /**
     * Expands entities, e.g. changes '<' to '&lt;'.
     *
     * @param    string $val The string in which to expand entities.
     * @return mixed|string
     */
    protected function expandEntities($val)
    {
        if ($this->charencoding) {
            $val = str_replace('&', '&amp;', $val);
            $val = str_replace("'", '&apos;', $val);
            $val = str_replace('"', '&quot;', $val);
            $val = str_replace('<', '&lt;', $val);
            $val = str_replace('>', '&gt;', $val);
        }

        return $val;
    }

    /**
     * Returns error string if present
     *
     * @return   mixed error string or false
     */
    public function getError()
    {
        if ('' !== $this->error_str) {
            return $this->error_str;
        }

        return false;
    }

    /**
     * Sets error string
     *
     * @param string $str
     */
    protected function setError($str)
    {
        $this->error_str = $str;
    }

    /**
     * Detect if array is a simple array or a struct (associative array)
     *
     * @param    mixed $val The PHP array
     * @return    string    (arraySimple|arrayStruct)
     */
    protected function isArraySimpleOrStruct($val)
    {
        $keyList = array_keys($val);
        foreach ($keyList as $keyListValue) {
            if (!is_int($keyListValue)) {
                return 'arrayStruct';
            }
        }

        return 'arraySimple';
    }

    /**
     * Serializes PHP values in accordance w/ section 5. Type information is
     * not serialized if $use == 'literal'.
     *
     * @param    mixed          $val        The value to serialize
     * @param bool|string       $name       The name (local part) of the XML element
     * @param bool|string       $type       The XML schema type (local part) for the element
     * @param bool|string       $name_ns    The namespace for the name of the XML element
     * @param bool|string       $type_ns    The namespace for the type of the element
     * @param bool|string|array $attributes The attributes to serialize as name=>value pairs
     * @param    string         $use        The WSDL "use" (encoded|literal)
     * @param    bool           $soapval    Whether this is called from Soapval.
     * @return    string    The serialized element, possibly with child elements
     */
    public function serialize_val($val, $name = false, $type = false, $name_ns = false, $type_ns = false, $attributes = false, $use = 'encoded', $soapval = false)
    {
        $this->debug("in serialize_val: name=$name, type=$type, name_ns=$name_ns, type_ns=$type_ns, use=$use, Soapval=$soapval");
        $this->appendDebug('value=' . $this->varDump($val));
        $this->appendDebug('attributes=' . $this->varDump($attributes));
        if (is_object($val) && 'soapval' === get_class($val) && (!$soapval)) {
            $this->debug('serialize_val: serialize Soapval');
            $xml = $val->serialize($use);
            $this->appendDebug($val->getDebug());
            $val->clearDebug();
            $this->debug("serialize_val of Soapval returning $xml");

            return $xml;
        }
        // force valid name if necessary
        if (is_numeric($name)) {
            $name = '__numeric_' . $name;
        } elseif (!$name) {
            $name = 'noname';
        }
        // if name has ns, add ns prefix to name
        $xmlns = '';
        if ($name_ns) {
            $prefix = 'nu' . mt_rand(1000, 9999);
            $name   = $prefix . ':' . $name;

Are you sure $name of type string|true can be used in concatenation?

            $xmlns  .= " xmlns:$prefix=\"$name_ns\"";
        }
        // if type is prefixed, create type prefix
        if ('' !== $type_ns && $type_ns === $this->namespaces['xsd']) {
            // need to fix this. shouldn't default to xsd if no ns specified
            // w/o checking against typemap
            $type_prefix = 'xsd';
        } elseif ($type_ns) {
            $type_prefix = 'ns' . mt_rand(1000, 9999);
            $xmlns       .= " xmlns:$type_prefix=\"$type_ns\"";
        }
        // serialize attributes if present
        $atts = '';
        if ($attributes) {
            foreach ($attributes as $k => $v) {
                $atts .= " $k=\"" . $this->expandEntities($v) . '"';
            }
        }
        // serialize null value
        if (null === $val) {
            $this->debug('serialize_val: serialize null');
            if ('literal' === $use) {
                // TODO: depends on minOccurs
                $xml = "<$name$xmlns$atts>";
                $this->debug("serialize_val returning $xml");

                return $xml;
            }
                if (isset($type) && isset($type_prefix)) {
                    $type_str = " xsi:type=\"$type_prefix:$type\"";
                } else {
                    $type_str = '';
                }
                $xml = "<$name$xmlns$type_str$atts xsi:nil=\"true\">";
                $this->debug("serialize_val returning $xml");

                return $xml;
            }
        // serialize if an xsd built-in primitive type
        if ('' !== $type && isset($this->typemap[$this->XMLSchemaVersion][$type])) {
            $this->debug('serialize_val: serialize xsd built-in primitive type');
            if (is_bool($val)) {
                if ('boolean' === $type) {
                    $val = $val ? 'true' : 'false';
                } elseif (!$val) {
                    $val = 0;
                }
            } elseif (is_string($val)) {
                $val = $this->expandEntities($val);
            }
            if ('literal' === $use) {
                $xml = "<$name$xmlns$atts>$val</$name>";
                $this->debug("serialize_val returning $xml");

                return $xml;
            }
                $xml = "<$name$xmlns xsi:type=\"xsd:$type\"$atts>$val</$name>";
                $this->debug("serialize_val returning $xml");

                return $xml;
            }
        // detect type and serialize
        $xml = '';
        switch (true) {
            case (is_bool($val) || 'boolean' === $type):
                $this->debug('serialize_val: serialize boolean');
                if ('boolean' === $type) {
                    $val = $val ? 'true' : 'false';
                } elseif (!$val) {
                    $val = 0;
                }
                if ('literal' === $use) {
                    $xml .= "<$name$xmlns$atts>$val</$name>";
                } else {
                    $xml .= "<$name$xmlns xsi:type=\"xsd:boolean\"$atts>$val</$name>";
                }

                break;
            case (is_int($val) || is_int($val) || 'int' === $type):
                $this->debug('serialize_val: serialize int');
                if ('literal' === $use) {
                    $xml .= "<$name$xmlns$atts>$val</$name>";
                } else {
                    $xml .= "<$name$xmlns xsi:type=\"xsd:int\"$atts>$val</$name>";
                }

                break;
            case (is_float($val) || is_float($val) || 'float' === $type):
                $this->debug('serialize_val: serialize float');
                if ('literal' === $use) {
                    $xml .= "<$name$xmlns$atts>$val</$name>";
                } else {
                    $xml .= "<$name$xmlns xsi:type=\"xsd:float\"$atts>$val</$name>";
                }

                break;
            case (is_string($val) || 'string' === $type):
                $this->debug('serialize_val: serialize string');
                $val = $this->expandEntities($val);
                if ('literal' === $use) {
                    $xml .= "<$name$xmlns$atts>$val</$name>";
                } else {
                    $xml .= "<$name$xmlns xsi:type=\"xsd:string\"$atts>$val</$name>";
                }

                break;
            case is_object($val):
                $this->debug('serialize_val: serialize object');
                if ('soapval' === get_class($val)) {
                    $this->debug('serialize_val: serialize Soapval object');
                    $pXml = $val->serialize($use);
                    $this->appendDebug($val->getDebug());
                    $val->clearDebug();
                } else {
                    if (!$name) {
                        $name = get_class($val);
                        $this->debug("In serialize_val, used class name $name as element name");
                    } else {
                        $this->debug("In serialize_val, do not override name $name for element name for class " . get_class($val));
                    }
                    foreach (get_object_vars($val) as $k => $v) {
                        $pXml = isset($pXml) ? $pXml . $this->serialize_val($v, $k, false, false, false, false, $use) : $this->serialize_val($v, $k, false, false, false, false, $use);
                    }
                }
                $type_str = '';
                if (isset($type) && isset($type_prefix)) {
                    $type_str = " xsi:type=\"$type_prefix:$type\"";
                }
                if ('literal' === $use) {
                    $xml .= "<$name$xmlns$atts>$pXml</$name>";

The variable $pXml does not seem to be defined for all execution paths leading up to this point.

                } else {
                    $xml .= "<$name$xmlns$type_str$atts>$pXml</$name>";
                }

                break;
            case (is_array($val) || $type):
                // detect if struct or array
                $array_types = [];
                $tt_ns = $tt = '';
                $valueType = $this->isArraySimpleOrStruct($val);
                if ('arraySimple' === $valueType || preg_match('/^ArrayOf/', $type)) {
                    $this->debug('serialize_val: serialize array');
                    $i = 0;
                    if (is_array($val) && count($val) > 0) {
                        foreach ($val as $v) {
                            if (is_object($v) && 'soapval' === get_class($v)) {
                                $tt_ns = $v->type_ns;
                                $tt    = $v->type;
                            } elseif (is_array($v)) {
                                $tt = $this->isArraySimpleOrStruct($v);
                            } else {
                                $tt = gettype($v);
                            }
                            $array_types[$tt] = 1;
                            // TODO: for literal, the name should be $name
                            $xml .= $this->serialize_val($v, 'item', false, false, false, false, $use);
                            ++$i;
                        }
                        if (is_array($array_types) && count($array_types) > 1) {
                            $array_typename = 'xsd:anyType';
                        } elseif (isset($tt) && isset($this->typemap[$this->XMLSchemaVersion][$tt])) {
                            if ('integer' === $tt) {
                                $tt = 'int';
                            }
                            $array_typename = 'xsd:' . $tt;
                        } elseif (isset($tt) && 'arraySimple' === $tt) {
                            $array_typename = 'SOAP-ENC:Array';
                        } elseif (isset($tt) && 'arrayStruct' === $tt) {
                            $array_typename = 'unnamed_struct_use_soapval';
                        } else {
                            // if type is prefixed, create type prefix
                            if ('' !== $tt_ns && $tt_ns === $this->namespaces['xsd']) {
                                $array_typename = 'xsd:' . $tt;
                            } elseif ($tt_ns) {
                                $tt_prefix      = 'ns' . mt_rand(1000, 9999);
                                $array_typename = "$tt_prefix:$tt";
                                $xmlns          .= " xmlns:$tt_prefix=\"$tt_ns\"";
                            } else {
                                $array_typename = $tt;
                            }
                        }
                        $array_type = $i;
                        if ('literal' === $use) {
                            $type_str = '';
                        } elseif (isset($type) && isset($type_prefix)) {
                            $type_str = " xsi:type=\"$type_prefix:$type\"";
                        } else {
                            $type_str = ' xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="' . $array_typename . "[$array_type]\"";
                        }
                        // empty array
                    } else {
                        $type_str = ' xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:anyType[0]"';
                        if ('literal' === $use) {
                            $type_str = '';
                        } elseif (isset($type) && isset($type_prefix)) {
                            $type_str = " xsi:type=\"$type_prefix:$type\"";
                        }
                    }
                    // TODO: for array in literal, there is no wrapper here
                    $xml = "<$name$xmlns$type_str$atts>" . $xml . "</$name>";
                } else {
                    // got a struct
                    $this->debug('serialize_val: serialize struct');
                    $type_str = '';
                    if (isset($type) && isset($type_prefix)) {
                        $type_str = " xsi:type=\"$type_prefix:$type\"";
                    }
                    if ('literal' === $use) {
                        $xml .= "<$name$xmlns$atts>";
                    } else {
                        $xml .= "<$name$xmlns$type_str$atts>";
                    }
                    foreach ($val as $k => $v) {
                        // Apache Map
                        if ('Map' === $type && 'http://xml.apache.org/xml-soap' === $type_ns) {
                            $xml .= '<item>';
                            $xml .= $this->serialize_val($k, 'key', false, false, false, false, $use);
                            $xml .= $this->serialize_val($v, 'value', false, false, false, false, $use);
                            $xml .= '</item>';
                        } else {
                            $xml .= $this->serialize_val($v, $k, false, false, false, false, $use);
                        }
                    }
                    $xml .= "</$name>";
                }

                break;
            default:
                $this->debug('serialize_val: serialize unknown');
                $xml .= 'not detected, got ' . gettype($val) . ' for ' . $val;

                break;
        }
        $this->debug("serialize_val returning $xml");

        return $xml;
    }

    /**
     * Serializes a message
     *
     * @param string $body          the XML of the SOAP body
     * @param mixed  $headers       optional string of XML with SOAP header content, or array of Soapval objects for SOAP headers, or associative array
     * @param array  $namespaces    optional the namespaces used in generating the body and headers
     * @param string $style         optional (rpc|document)
     * @param string $use           optional (encoded|literal)
     * @param string $encodingStyle optional (usually 'http://schemas.xmlsoap.org/soap/encoding/' for encoded)
     * @return string the message
     */
    public function serializeEnvelope($body, $headers = false, $namespaces = [], $style = 'rpc', $use = 'encoded', $encodingStyle = 'http://schemas.xmlsoap.org/soap/encoding/')
    {
        // TODO: add an option to automatically run utf8_encode on $body and $headers
        // if $this->soap_defencoding is UTF-8.  Not doing this automatically allows
        // one to send arbitrary UTF-8 characters, not just characters that map to ISO-8859-1

        $this->debug('In serializeEnvelope length=' . mb_strlen($body) . ' body (max 1000 characters)=' . mb_substr($body, 0, 1000) . " style=$style use=$use encodingStyle=$encodingStyle");
        $this->debug('headers:');
        $this->appendDebug($this->varDump($headers));
        $this->debug('namespaces:');
        $this->appendDebug($this->varDump($namespaces));
        // serialize namespaces
        $ns_string = '';
        foreach (array_merge($this->namespaces, $namespaces) as $k => $v) {
            $ns_string .= " xmlns:$k=\"$v\"";
        }
        if ($encodingStyle) {
            $ns_string = " SOAP-ENV:encodingStyle=\"$encodingStyle\"$ns_string";
        }

        // serialize headers
        if ($headers) {
            if (is_array($headers)) {
                $xml = '';
                foreach ($headers as $k => $v) {
                    if (is_object($v) && 'soapval' === get_class($v)) {
                        $xml .= $this->serialize_val($v, false, false, false, false, false, $use);
                    } else {
                        $xml .= $this->serialize_val($v, $k, false, false, false, false, $use);
                    }
                }
                $headers = $xml;
                $this->debug("In serializeEnvelope, serialized array of headers to $headers");
            }
            $headers = '<SOAP-ENV:Header>' . $headers . '</SOAP-ENV:Header>';
        }
        // serialize envelope
        return '<?xml version="1.0" encoding="' . $this->soap_defencoding . '"?' . '>' . '<SOAP-ENV:Envelope' . $ns_string . '>' . $headers . '<SOAP-ENV:Body>' . $body . '</SOAP-ENV:Body>' . '</SOAP-ENV:Envelope>';

Are you sure $headers of type false|string|mixed can be used in concatenation?

    }

    /**
     * Formats a string to be inserted into an HTML stream
     *
     * @param string $str The string to format
     * @return string The formatted string
     * @deprecated
     */
    public function formatDump($str)
    {
        $str = htmlspecialchars($str);

        return nl2br($str);
    }

    /**
     * Contracts (changes namespace to prefix) a qualified name
     *
     * @param    string $qname qname
     * @return    string contracted qname
     */
    protected function contractQName($qname)
    {
        // get element namespace
        //$this->xdebug("Contract $qname");
        if (mb_strrpos($qname, ':')) {
            // get unqualified name
            $name = mb_substr($qname, mb_strrpos($qname, ':') + 1);
            // get ns
            $ns = mb_substr($qname, 0, mb_strrpos($qname, ':'));
            $p  = $this->getPrefixFromNamespace($ns);
            if ($p) {
                return $p . ':' . $name;
            }

            return $qname;
        }

        return $qname;
    }

    /**
     * Expands (changes prefix to namespace) a qualified name
     *
     * @param    string $qname qname
     * @return    string expanded qname
     */
    protected function expandQname($qname)
    {
        // get element prefix
        if (mb_strpos($qname, ':') && !preg_match('/^http:\/\//', $qname)) {
            // get unqualified name
            $name = mb_substr(mb_strstr($qname, ':'), 1);
            // get ns prefix
            $prefix = mb_substr($qname, 0, mb_strpos($qname, ':'));
            if (isset($this->namespaces[$prefix])) {
                return $this->namespaces[$prefix] . ':' . $name;
            }

                return $qname;
            }

            return $qname;
        }

    /**
     * Returns the local part of a prefixed string
     * Returns the original string, if not prefixed
     *
     * @param string $str The prefixed string
     * @return string The local part
     */
    public function getLocalPart($str)
    {
        if (false !== ($sstr = mb_strrchr($str, ':'))) {
            // get unqualified name
            return mb_substr($sstr, 1);
        }

            return $str;
        }

    /**
     * Returns the prefix part of a prefixed string
     * Returns false, if not prefixed
     *
     * @param string $str The prefixed string
     * @return mixed The prefix or false if there is no prefix
     */
    public function getPrefix($str)
    {
        if (false !== ($pos = mb_strrpos($str, ':'))) {
            // get prefix
            return mb_substr($str, 0, $pos);
        }

        return false;
    }

    /**
     * Pass it a prefix, it returns a namespace
     *
     * @param string $prefix The prefix
     * @return mixed The namespace, false if no namespace has the specified prefix
     */
    public function getNamespaceFromPrefix($prefix)
    {
        if (isset($this->namespaces[$prefix])) {
            return $this->namespaces[$prefix];
        }
        //$this->setError("No namespace registered for prefix '$prefix'");
        return false;
    }

    /**
     * Returns the prefix for a given namespace (or prefix)
     * or false if no prefixes registered for the given namespace
     *
     * @param string $ns The namespace
     * @return mixed The prefix, false if the namespace has no prefixes
     */
    public function getPrefixFromNamespace($ns)
    {
        foreach ($this->namespaces as $p => $n) {
            if ($ns === $n || $ns === $p) {
                $this->usedNamespaces[$p] = $n;

                return $p;
            }
        }

        return false;
    }

    /**
     * Returns the time in ODBC canonical form with microseconds
     *
     * @return string The time in ODBC canonical form with microseconds
     */
    public function getmicrotime()
    {
        if (function_exists('gettimeofday')) {
            $tod  = gettimeofday();
            $sec  = $tod['sec'];
            $usec = $tod['usec'];
        } else {
            $sec  = time();
            $usec = 0;
        }

        return strftime('%Y-%m-%d %H:%M:%S', $sec) . '.' . sprintf('%06d', $usec);
    }

    /**
     * Returns a string with the output of var_dump
     *
     * @param mixed $data The variable to var_dump
     * @return string The output of var_dump
     */
    public function varDump($data)
    {
        ob_start();
        var_dump($data);

var_dump($data) looks like debug code. Are you sure you do not want to remove it?

        $ret_val = ob_get_contents();
        ob_end_clean();

        return $ret_val;
    }

    /**
     * Represents the object as a string
     *
     * @return    string
     */
    public function __toString()
    {
        return $this->varDump($this);
    }
}

// XML Schema Datatype Helper Functions

//xsd:dateTime helpers

/**
 * Convert unix timestamp to ISO 8601 compliant date string
 *
 * @param    int  $timestamp Unix time stamp
 * @param    bool $utc       Whether the time stamp is UTC or local
 * @return    mixed ISO 8601 date string or false
 */
function timestamp_to_iso8601($timestamp, $utc = true)
{
    $datestr = date('Y-m-d\TH:i:sO', $timestamp);
    $pos     = mb_strrpos($datestr, '+');
    if (false === $pos) {
        $pos = mb_strrpos($datestr, '-');
    }
    if (false !== $pos) {
        if (mb_strlen($datestr) === $pos + 5) {
            $datestr = mb_substr($datestr, 0, $pos + 3) . ':' . mb_substr($datestr, -2);
        }
    }
    if ($utc) {
        $pattern = '/' . '([0-9]{4})-' .    // centuries & years CCYY-
                   '([0-9]{2})-' .    // months MM-
                   '([0-9]{2})' .    // days DD
                   'T' .            // separator T
                   '([0-9]{2}):' .    // hours hh:
                   '([0-9]{2}):' .    // minutes mm:
                   '([0-9]{2})(\.[0-9]*)?' . // seconds ss.ss...
                   '(Z|[+\-][0-9]{2}:?[0-9]{2})?' . // Z to indicate UTC, -/+HH:MM:SS.SS... for local tz's
                   '/';
        if (preg_match($pattern, $datestr, $regs)) {
            return sprintf('%04d-%02d-%02dT%02d:%02d:%02dZ', $regs[1], $regs[2], $regs[3], $regs[4], $regs[5], $regs[6]);
        }

        return false;
    }

        return $datestr;
    }

/**
 * Convert ISO 8601 compliant date string to unix timestamp
 *
 * @param    string $datestr ISO 8601 compliant date string
 * @return    mixed Unix timestamp (int) or false
 */
function iso8601_to_timestamp($datestr)
{
    $pattern = '/' . '([0-9]{4})-' .    // centuries & years CCYY-
               '([0-9]{2})-' .    // months MM-
               '([0-9]{2})' .    // days DD
               'T' .            // separator T
               '([0-9]{2}):' .    // hours hh:
               '([0-9]{2}):' .    // minutes mm:
               '([0-9]{2})(\.[0-9]+)?' . // seconds ss.ss...
               '(Z|[+\-][0-9]{2}:?[0-9]{2})?' . // Z to indicate UTC, -/+HH:MM:SS.SS... for local tz's
               '/';
    if (preg_match($pattern, $datestr, $regs)) {
        // not utc
        if ('Z' !== $regs[8]) {
            $op = mb_substr($regs[8], 0, 1);
            $h  = mb_substr($regs[8], 1, 2);
            $m  = mb_substr($regs[8], mb_strlen($regs[8]) - 2, 2);
            if ('-' === $op) {
                $regs[4] += $h;
                $regs[5] += $m;
            } elseif ('+' === $op) {
                $regs[4] -= $h;
                $regs[5] -= $m;
            }
        }

        return gmmktime($regs[4], $regs[5], $regs[6], $regs[2], $regs[3], $regs[1]);
    //		return strtotime("$regs[1]-$regs[2]-$regs[3] $regs[4]:$regs[5]:$regs[6]Z");
    }

        return false;
    }

/**
 * Sleeps some number of microseconds
 *
 * @param    string $usec the number of microseconds to sleep
 * @deprecated
 */
function usleepWindows($usec)
{
    $start = gettimeofday();
    do {
        $stop       = gettimeofday();
        $timePassed = 1000000 * ($stop['sec'] - $start['sec']) + $stop['usec'] - $start['usec'];
    } while ($timePassed < $usec);
}

/**
 * Contains information for a SOAP fault.
 * Mainly used for returning faults from deployed functions
 * in a server instance.
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 */
class Nusoap_fault extends Nusoap_base
{
    /**
     * The fault code (client|server)
     * @var string
     */
    private $faultcode;
    /**
     * The fault actor
     * @var string
     */
    private $faultactor;
    /**
     * The fault string, a description of the fault
     * @var string
     */
    private $faultstring;
    /**
     * The fault detail, typically a string or array of string
     * @var mixed
     */
    private $faultdetail;

    /**
     * Constructor
     *
     * @param string $faultcode   (SOAP-ENV:Client | SOAP-ENV:Server)
     * @param string $faultactor  only used when msg routed between multiple actors
     * @param string $faultstring human readable error message
     * @param mixed  $faultdetail detail, typically a string or array of string
     */
    public function __construct($faultcode, $faultactor = '', $faultstring = '', $faultdetail = '')
    {
        parent::__construct();
        $this->faultcode   = $faultcode;
        $this->faultactor  = $faultactor;
        $this->faultstring = $faultstring;
        $this->faultdetail = $faultdetail;
    }

    /**
     * Serialize a fault
     *
     * @return    string    The serialization of the fault instance.
     */
    public function serialize()
    {
        $ns_string = '';
        foreach ($this->namespaces as $k => $v) {
            $ns_string .= "\n  xmlns:$k=\"$v\"";
        }
        $return_msg = '<?xml version="1.0" encoding="'
                      . $this->soap_defencoding
                      . '"?>'
                      . '<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"'
                      . $ns_string
                      . ">\n"
                      . '<SOAP-ENV:Body>'
                      . '<SOAP-ENV:Fault>'
                      . $this->serialize_val($this->faultcode, 'faultcode')
                      . $this->serialize_val($this->faultactor, 'faultactor')
                      . $this->serialize_val($this->faultstring, 'faultstring')
                      . $this->serialize_val($this->faultdetail, 'detail')
                      . '</SOAP-ENV:Fault>'
                      . '</SOAP-ENV:Body>'
                      . '</SOAP-ENV:Envelope>';

        return $return_msg;
    }
}

/**
 * Backward compatibility
 */
class Soap_fault extends Nusoap_fault
{
}

/**
 * Parses an XML Schema, allows access to it's data, other utility methods.
 * imperfect, no validation... yet, but quite functional.
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @author   Scott Nichol <snichol@users.sourceforge.net>
 */
class Nusoap_xmlschema extends Nusoap_base
{
    // files
    public $schema = '';
    public $xml    = '';
    // namespaces
    public $enclosingNamespaces;
    // schema info
    public $schemaInfo            = [];
    public $schemaTargetNamespace = '';
    // types, elements, attributes defined by the schema
    public $attributes       = [];
    public $complexTypes     = [];
    public $complexTypeStack = [];
    public $currentComplexType;
    public $elements         = [];
    public $elementStack     = [];
    public $currentElement;
    public $simpleTypes      = [];
    public $simpleTypeStack  = [];
    public $currentSimpleType;
    // imports
    public $imports = [];
    // parser vars
    public $parser;
    public $position         = 0;
    public $depth            = 0;
    public $depth_array      = [];
    public $message          = [];
    public $defaultNamespace = [];

    /**
     * Constructor
     *
     * @param string $schema     schema document URI
     * @param string $xml        xml document URI
     * @param array  $namespaces namespaces defined in enclosing XML
     */
    public function __construct($schema = '', $xml = '', $namespaces = [])
    {
        parent::__construct();
        $this->debug('Nusoap_xmlschema class instantiated, inside constructor');
        // files
        $this->schema = $schema;
        $this->xml    = $xml;
        // namespaces
        $this->enclosingNamespaces = $namespaces;
        $this->namespaces          = array_merge($this->namespaces, $namespaces);
        // parse schema file
        if ('' !== $schema) {
            $this->debug('initial schema file: ' . $schema);
            $this->parseFile($schema, 'schema');
        }

        // parse xml file
        if ('' !== $xml) {
            $this->debug('initial xml file: ' . $xml);
            $this->parseFile($xml, 'xml');
        }
    }

    /**
     * Parse an XML file
     *
     * @param string $xml  path/URL to XML file
     * @param string $type (schema | xml)
     * @return bool
     */
    public function parseFile($xml, $type)
    {
        // parse xml file
        if ('' !== $xml) {
            $xmlStr = @file_get_contents($xml);
            if ('' === $xmlStr) {
                $msg = 'Error reading XML from ' . $xml;
                $this->setError($msg);
                $this->debug($msg);

                return false;
            }

            $this->debug("parsing $xml");
            $this->parseString($xmlStr, $type);
            $this->debug("done parsing $xml");

            return true;
        }

        return false;
    }

    /**
     * Parse an XML string
     *
     * @param    string $xml  path or URL
     * @param    string $type (schema|xml)
     */
    private function parseString($xml, $type)
    {
        // parse xml string
        if ('' !== $xml) {
            // Create an XML parser.
            $this->parser = xml_parser_create();
            // Set the options for parsing the XML data.
            xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
            // Set the object for the parser.
            xml_set_object($this->parser, $this);
            // Set the element handlers for the parser.
            if ('schema' === $type) {
                xml_set_element_handler($this->parser, 'schemaStartElement', 'schemaEndElement');
                xml_set_character_data_handler($this->parser, 'schemaCharacterData');
            } elseif ('xml' === $type) {
                xml_set_element_handler($this->parser, 'xmlStartElement', 'xmlEndElement');
                xml_set_character_data_handler($this->parser, 'xmlCharacterData');
            }

            // Parse the XML file.
            if (!xml_parse($this->parser, $xml, true)) {
                // Display an error message.
                $errstr = sprintf('XML error parsing XML schema on line %d: %s', xml_get_current_line_number($this->parser), xml_error_string(xml_get_error_code($this->parser)));
                $this->debug($errstr);
                $this->debug("XML payload:\n" . $xml);
                $this->setError($errstr);
            }

            xml_parser_free($this->parser);
            unset($this->parser);
        } else {
            $this->debug('no xml passed to parseString()!!');
            $this->setError('no xml passed to parseString()!!');
        }
    }

    /**
     * Gets a type name for an unnamed type
     * @param    string  $ename  Element name
     * @return    string    A type name for an unnamed type
     */
    private function CreateTypeName($ename)
    {
        $scope = '';
        for ($i = 0, $iMax = count($this->complexTypeStack); $i < $iMax; ++$i) {
            $scope .= $this->complexTypeStack[$i] . '_';
        }

        return $scope . $ename . '_ContainedType';
    }

    /**
     * Start-element handler
     *
     * @param    string       $parser XML parser object
     * @param    string       $name   element name
     * @param    string|array $attrs  associative array of attributes
     */
    public function schemaStartElement($parser, $name, $attrs)

The parameter $parser is not used and could be removed.

    {
        // position in the total number of elements, starting from 0
        $eAttrs = [];
        $aname = '';
        $pos   = $this->position++;
        $depth = $this->depth++;
        // set self as current value for this depth
        $this->depth_array[$depth] = $pos;
        $this->message[$pos]       = ['cdata' => ''];
        if ($depth > 0) {
            $this->defaultNamespace[$pos] = $this->defaultNamespace[$this->depth_array[$depth - 1]];
        } else {
            $this->defaultNamespace[$pos] = false;
        }

        // get element prefix
        if (false !== ($prefix = $this->getPrefix($name))) {
            // get unqualified name
            $name = $this->getLocalPart($name);
        } else {
            $prefix = '';
        }

        // loop thru attributes, expanding, and registering namespace declarations
        if (is_array($attrs) && count($attrs) > 0) {
            foreach ($attrs as $k => $v) {
                // if ns declarations, add to class level array of valid namespaces
                if (preg_match('/^xmlns/', $k)) {
                    //$this->xdebug("$k: $v");
                    //$this->xdebug('ns_prefix: '.$this->getPrefix($k));
                    if (false !== ($ns_prefix = mb_substr(mb_strrchr($k, ':'), 1))) {
                        //$this->xdebug("Add namespace[$ns_prefix] = $v");
                        $this->namespaces[$ns_prefix] = $v;
                    } else {
                        $this->defaultNamespace[$pos] = $v;
                        if (!$this->getPrefixFromNamespace($v)) {
                            $this->namespaces['ns' . (count($this->namespaces) + 1)] = $v;
                        }
                    }
                    if ('http://www.w3.org/2001/XMLSchema' === $v || 'http://www.w3.org/1999/XMLSchema' === $v || 'http://www.w3.org/2000/10/XMLSchema' === $v) {
                        $this->XMLSchemaVersion  = $v;
                        $this->namespaces['xsi'] = $v . '-instance';
                    }
                }
            }
            foreach ($attrs as $k => $v) {
                // expand each attribute
                $k          = mb_strpos($k, ':') ? $this->expandQname($k) : $k;
                $v          = mb_strpos($v, ':') ? $this->expandQname($v) : $v;
                $eAttrs[$k] = $v;
            }
            $attrs = $eAttrs;
        } else {
            $attrs = [];
        }
        // find status, register data
        switch ($name) {
            case 'all':
           // (optional) compositor content for a complexType
            case 'choice':
            case 'group':
            case 'sequence':
                //$this->xdebug("compositor $name for currentComplexType: $this->currentComplexType and currentElement: $this->currentElement");

                $this->complexTypes[$this->currentComplexType]['compositor'] = $name;
                //if($name == 'all' || $name == 'sequence'){
                //	$this->complexTypes[$this->currentComplexType]['phpType'] = 'struct';
                //}

                break;
            case 'attribute':
            // complexType attribute
                //$this->xdebug("parsing attribute $attrs[name] $attrs[ref] of value: ".$attrs['http://schemas.xmlsoap.org/wsdl/:arrayType']);
                $this->xdebug('parsing attribute:');
                $this->appendDebug($this->varDump($attrs));
                if (!isset($attrs['form'])) {
                    // TODO: handle globals
                    $attrs['form'] = $this->schemaInfo['attributeFormDefault'];
                }
                if (isset($attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'])) {
                    $v = $attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'];
                    if (!mb_strpos($v, ':')) {
                        // no namespace in arrayType attribute value...
                        if ($this->defaultNamespace[$pos]) {
                            // ...so use the default
                            $attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'] = $this->defaultNamespace[$pos] . ':' . $attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'];
                        }
                    }
                }
                if (isset($attrs['name'])) {
                    $this->attributes[$attrs['name']] = $attrs;
                    $aname                            = $attrs['name'];
                } elseif (isset($attrs['ref']) && 'http://schemas.xmlsoap.org/soap/encoding/:arrayType' === $attrs['ref']) {
                    $aname = '';
                    if (isset($attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'])) {
                        $aname = $attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'];
                    }
                } elseif (isset($attrs['ref'])) {
                    $aname                           = $attrs['ref'];
                    $this->attributes[$attrs['ref']] = $attrs;
                }

                if ($this->currentComplexType) {
                    // This should *always* be
                    $this->complexTypes[$this->currentComplexType]['attrs'][$aname] = $attrs;
                }
                // arrayType attribute
                if (isset($attrs['http://schemas.xmlsoap.org/wsdl/:arrayType']) || 'arrayType' === $this->getLocalPart($aname)) {
                    $this->complexTypes[$this->currentComplexType]['phpType'] = 'array';
                    $prefix                                                   = $this->getPrefix($aname);

The assignment to $prefix is dead and can be removed.

                    $v                                                        = '';
                    if (isset($attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'])) {
                        $v = $attrs['http://schemas.xmlsoap.org/wsdl/:arrayType'];
                    }
                    if (mb_strpos($v, '[,]')) {
                        $this->complexTypes[$this->currentComplexType]['multidimensional'] = true;
                    }
                    $v = mb_substr($v, 0, mb_strpos($v, '[')); // clip the []
                    if (!mb_strpos($v, ':') && isset($this->typemap[$this->XMLSchemaVersion][$v])) {
                        $v = $this->XMLSchemaVersion . ':' . $v;
                    }
                    $this->complexTypes[$this->currentComplexType]['arrayType'] = $v;
                }

                break;
            case 'complexContent':
            // (optional) content for a complexType
                $this->xdebug("do nothing for element $name");

                break;
            case 'complexType':
                $this->complexTypeStack[] = $this->currentComplexType;
                if (isset($attrs['name'])) {
                    // TODO: what is the scope of named complexTypes that appear
                    //       nested within other c complexTypes?
                    $this->xdebug('processing named complexType ' . $attrs['name']);
                    //$this->currentElement = false;
                    $this->currentComplexType                                   = $attrs['name'];
                    $this->complexTypes[$this->currentComplexType]              = $attrs;
                    $this->complexTypes[$this->currentComplexType]['typeClass'] = 'complexType';
                    // This is for constructs like
                    //           <complexType name="ListOfString" base="soap:Array">
                    //                <sequence>
                    //                    <element name="string" type="xsd:string"
                    //                        minOccurs="0" maxOccurs="unbounded" >
                    //                </sequence>
                    //            </complexType>
                    if (isset($attrs['base']) && preg_match('/:Array$/', $attrs['base'])) {
                        $this->xdebug('complexType is unusual array');
                        $this->complexTypes[$this->currentComplexType]['phpType'] = 'array';
                    } else {
                        $this->complexTypes[$this->currentComplexType]['phpType'] = 'struct';
                    }
                } else {
                    $name = $this->CreateTypeName($this->currentElement);
                    $this->xdebug('processing unnamed complexType for element ' . $this->currentElement . ' named ' . $name);
                    $this->currentComplexType = $name;
                    //$this->currentElement = false;
                    $this->complexTypes[$this->currentComplexType]              = $attrs;
                    $this->complexTypes[$this->currentComplexType]['typeClass'] = 'complexType';
                    // This is for constructs like
                    //           <complexType name="ListOfString" base="soap:Array">
                    //                <sequence>
                    //                    <element name="string" type="xsd:string"
                    //                        minOccurs="0" maxOccurs="unbounded" >
                    //                </sequence>
                    //            </complexType>
                    if (isset($attrs['base']) && preg_match('/:Array$/', $attrs['base'])) {
                        $this->xdebug('complexType is unusual array');
                        $this->complexTypes[$this->currentComplexType]['phpType'] = 'array';
                    } else {
                        $this->complexTypes[$this->currentComplexType]['phpType'] = 'struct';
                    }
                }
                $this->complexTypes[$this->currentComplexType]['simpleContent'] = 'false';

                break;
            case 'element':
                $this->elementStack[] = $this->currentElement;
                if (!isset($attrs['form'])) {
                    if ($this->currentComplexType) {
                        $attrs['form'] = $this->schemaInfo['elementFormDefault'];
                    } else {
                        // global
                        $attrs['form'] = 'qualified';
                    }
                }
                if (isset($attrs['type'])) {
                    $this->xdebug('processing typed element ' . $attrs['name'] . ' of type ' . $attrs['type']);
                    if (!$this->getPrefix($attrs['type'])) {
                        if ($this->defaultNamespace[$pos]) {
                            $attrs['type'] = $this->defaultNamespace[$pos] . ':' . $attrs['type'];
                            $this->xdebug('used default namespace to make type ' . $attrs['type']);
                        }
                    }
                    // This is for constructs like
                    //           <complexType name="ListOfString" base="soap:Array">
                    //                <sequence>
                    //                    <element name="string" type="xsd:string"
                    //                        minOccurs="0" maxOccurs="unbounded" >
                    //                </sequence>
                    //            </complexType>
                    if ($this->currentComplexType && 'array' === $this->complexTypes[$this->currentComplexType]['phpType']) {
                        $this->xdebug('arrayType for unusual array is ' . $attrs['type']);
                        $this->complexTypes[$this->currentComplexType]['arrayType'] = $attrs['type'];
                    }
                    $this->currentElement = $attrs['name'];
                    $ename                = $attrs['name'];
                } elseif (isset($attrs['ref'])) {
                    $this->xdebug('processing element as ref to ' . $attrs['ref']);
                    $this->currentElement = 'ref to ' . $attrs['ref'];
                    $ename                = $this->getLocalPart($attrs['ref']);
                } else {
                    $type = $this->CreateTypeName($this->currentComplexType . '_' . $attrs['name']);
                    $this->xdebug('processing untyped element ' . $attrs['name'] . ' type ' . $type);
                    $this->currentElement = $attrs['name'];
                    $attrs['type']        = $this->schemaTargetNamespace . ':' . $type;
                    $ename                = $attrs['name'];
                }
                if (isset($ename) && $this->currentComplexType) {
                    $this->xdebug("add element $ename to complexType $this->currentComplexType");
                    $this->complexTypes[$this->currentComplexType]['elements'][$ename] = $attrs;
                } elseif (!isset($attrs['ref'])) {
                    $this->xdebug("add element $ename to elements array");
                    $this->elements[$attrs['name']]              = $attrs;
                    $this->elements[$attrs['name']]['typeClass'] = 'element';
                }

                break;
            case 'enumeration':
            //	restriction value list member
                $this->xdebug('enumeration ' . $attrs['value']);
                if ($this->currentSimpleType) {
                    $this->simpleTypes[$this->currentSimpleType]['enumeration'][] = $attrs['value'];
                } elseif ($this->currentComplexType) {
                    $this->complexTypes[$this->currentComplexType]['enumeration'][] = $attrs['value'];
                }

                break;
            case 'extension':
            // simpleContent or complexContent type extension
                $this->xdebug('extension ' . $attrs['base']);
                if ($this->currentComplexType) {
                    $ns = $this->getPrefix($attrs['base']);
                    if ('' === $ns) {
                        $this->complexTypes[$this->currentComplexType]['extensionBase'] = $this->schemaTargetNamespace . ':' . $attrs['base'];
                    } else {
                        $this->complexTypes[$this->currentComplexType]['extensionBase'] = $attrs['base'];
                    }
                } else {
                    $this->xdebug('no current complexType to set extensionBase');
                }

                break;
            case 'import':
                if (isset($attrs['schemaLocation'])) {
                    $this->xdebug('import namespace ' . $attrs['namespace'] . ' from ' . $attrs['schemaLocation']);
                    $this->imports[$attrs['namespace']][] = ['location' => $attrs['schemaLocation'], 'loaded' => false];
                } else {
                    $this->xdebug('import namespace ' . $attrs['namespace']);
                    $this->imports[$attrs['namespace']][] = ['location' => '', 'loaded' => true];
                    if (!$this->getPrefixFromNamespace($attrs['namespace'])) {
                        $this->namespaces['ns' . (count($this->namespaces) + 1)] = $attrs['namespace'];
                    }
                }

                break;
            case 'include':
                if (isset($attrs['schemaLocation'])) {
                    $this->xdebug('include into namespace ' . $this->schemaTargetNamespace . ' from ' . $attrs['schemaLocation']);
                    $this->imports[$this->schemaTargetNamespace][] = ['location' => $attrs['schemaLocation'], 'loaded' => false];
                } else {
                    $this->xdebug('ignoring invalid XML Schema construct: include without schemaLocation attribute');
                }

                break;
            case 'list':
            // simpleType value list
                $this->xdebug("do nothing for element $name");

                break;
            case 'restriction':
            // simpleType, simpleContent or complexContent value restriction
                $this->xdebug('restriction ' . $attrs['base']);
                if ($this->currentSimpleType) {
                    $this->simpleTypes[$this->currentSimpleType]['type'] = $attrs['base'];
                } elseif ($this->currentComplexType) {
                    $this->complexTypes[$this->currentComplexType]['restrictionBase'] = $attrs['base'];
                    if (':Array' === mb_strstr($attrs['base'], ':')) {
                        $this->complexTypes[$this->currentComplexType]['phpType'] = 'array';
                    }
                }

                break;
            case 'schema':
                $this->schemaInfo                  = $attrs;
                $this->schemaInfo['schemaVersion'] = $this->getNamespaceFromPrefix($prefix);
                if (isset($attrs['targetNamespace'])) {
                    $this->schemaTargetNamespace = $attrs['targetNamespace'];
                }
                if (!isset($attrs['elementFormDefault'])) {
                    $this->schemaInfo['elementFormDefault'] = 'unqualified';
                }
                if (!isset($attrs['attributeFormDefault'])) {
                    $this->schemaInfo['attributeFormDefault'] = 'unqualified';
                }

                break;
            case 'simpleContent':
            // (optional) content for a complexType
                if ($this->currentComplexType) {
                    // This should *always* be
                    $this->complexTypes[$this->currentComplexType]['simpleContent'] = 'true';
                } else {
                    $this->xdebug("do nothing for element $name because there is no current complexType");
                }

                break;
            case 'simpleType':
                $this->simpleTypeStack[] = $this->currentSimpleType;
                if (isset($attrs['name'])) {
                    $this->xdebug('processing simpleType for name ' . $attrs['name']);
                    $this->currentSimpleType                        = $attrs['name'];
                    $this->simpleTypes[$attrs['name']]              = $attrs;
                    $this->simpleTypes[$attrs['name']]['typeClass'] = 'simpleType';
                    $this->simpleTypes[$attrs['name']]['phpType']   = 'scalar';
                } else {
                    $name = $this->CreateTypeName($this->currentComplexType . '_' . $this->currentElement);
                    $this->xdebug('processing unnamed simpleType for element ' . $this->currentElement . ' named ' . $name);
                    $this->currentSimpleType = $name;
                    //$this->currentElement = false;
                    $this->simpleTypes[$this->currentSimpleType]            = $attrs;
                    $this->simpleTypes[$this->currentSimpleType]['phpType'] = 'scalar';
                }

                break;
            case 'union':
            // simpleType type list
                $this->xdebug("do nothing for element $name");

                break;
            default:
                $this->xdebug("do not have any logic to process element $name");
        }
    }

    /**
     * End-element handler
     *
     * @param    string $parser XML parser object
     * @param    string $name   element name
     */
    private function schemaEndElement($parser, $name)

The method schemaEndElement() is not used, and could be removed.

The parameter $parser is not used and could be removed.

    {
        // bring depth down a notch
        $this->depth--;
        // position of current element is equal to the last value left in depth_array for my depth
        if (isset($this->depth_array[$this->depth])) {
            $pos = $this->depth_array[$this->depth];

The assignment to $pos is dead and can be removed.

        }
        // get element prefix
        if (false !== ($prefix = $this->getPrefix($name))) {

The assignment to $prefix is dead and can be removed.

            // get unqualified name
            $name = $this->getLocalPart($name);
        } else {
            $prefix = '';
        }
        // move on...
        if ('complexType' === $name) {
            $this->xdebug('done processing complexType ' . ($this->currentComplexType ?: '(unknown)'));
            $this->xdebug($this->varDump($this->complexTypes[$this->currentComplexType]));
            $this->currentComplexType = array_pop($this->complexTypeStack);
            //$this->currentElement = false;
        }
        if ('element' === $name) {
            $this->xdebug('done processing element ' . ($this->currentElement ?: '(unknown)'));
            $this->currentElement = array_pop($this->elementStack);
        }
        if ('simpleType' === $name) {
            $this->xdebug('done processing simpleType ' . ($this->currentSimpleType ?: '(unknown)'));
            $this->xdebug($this->varDump($this->simpleTypes[$this->currentSimpleType]));
            $this->currentSimpleType = array_pop($this->simpleTypeStack);
        }
    }

    /**
     * Element content handler
     *
     * @param    string $parser XML parser object
     * @param    string $data   element content
     */
    private function schemaCharacterData($parser, $data)

The method schemaCharacterData() is not used, and could be removed.

The parameter $parser is not used and could be removed.

    {
        $pos                          = $this->depth_array[$this->depth - 1];
        $this->message[$pos]['cdata'] .= $data;
    }

    /**
     * Serialize the schema
     */
    public function serializeSchema()
    {
        $schemaPrefix = $this->getPrefixFromNamespace($this->XMLSchemaVersion);
        $xml          = '';
        // imports
        if (is_array($this->imports) && count($this->imports) > 0) {
            foreach ($this->imports as $ns => $list) {
                foreach ($list as $ii) {
                    if ('' !== $ii['location']) {
                        $xml .= " <$schemaPrefix:import location=\"" . $ii['location'] . '" namespace="' . $ns . "\" >\n";
                    } else {
                        $xml .= " <$schemaPrefix:import namespace=\"" . $ns . "\" >\n";
                    }
                }
            }
        }
        // complex types
        foreach ($this->complexTypes as $typeName => $attrs) {
            $contentStr = '';
            // serialize child elements
            if (isset($attrs['elements']) && (count($attrs['elements']) > 0)) {
                foreach ($attrs['elements'] as $element => $eParts) {
                    if (isset($eParts['ref'])) {
                        $contentStr .= "   <$schemaPrefix:element ref=\"$element\">\n";
                    } else {
                        $contentStr .= "   <$schemaPrefix:element name=\"$element\" type=\"" . $this->contractQName($eParts['type']) . '"';
                        foreach ($eParts as $aName => $aValue) {
                            // handle, e.g., abstract, default, form, minOccurs, maxOccurs, nillable
                            if ('name' !== $aName && 'type' !== $aName) {
                                $contentStr .= " $aName=\"$aValue\"";
                            }
                        }
                        $contentStr .= ">\n";
                    }
                }
                // compositor wraps elements
                if (isset($attrs['compositor']) && ('' !== $attrs['compositor'])) {
                    $contentStr = "  <$schemaPrefix:$attrs[compositor]>\n" . $contentStr . "  </$schemaPrefix:$attrs[compositor]>\n";
                }
            }
            // attributes
            if (isset($attrs['attrs']) && (count($attrs['attrs']) >= 1)) {
                foreach ($attrs['attrs'] as $attr => $aParts) {
                    $contentStr .= "    <$schemaPrefix:attribute";
                    foreach ($aParts as $a => $v) {
                        if ('ref' === $a || 'type' === $a) {
                            $contentStr .= " $a=\"" . $this->contractQName($v) . '"';
                        } elseif ('http://schemas.xmlsoap.org/wsdl/:arrayType' === $a) {
                            $this->usedNamespaces['wsdl'] = $this->namespaces['wsdl'];
                            $contentStr .= ' Wsdl:arrayType="' . $this->contractQName($v) . '"';
                        } else {
                            $contentStr .= " $a=\"$v\"";
                        }
                    }
                    $contentStr .= ">\n";
                }
            }
            // if restriction
            if (isset($attrs['restrictionBase']) && '' !== $attrs['restrictionBase']) {
                $contentStr = "   <$schemaPrefix:restriction base=\"" . $this->contractQName($attrs['restrictionBase']) . "\">\n" . $contentStr . "   </$schemaPrefix:restriction>\n";
                // complex or simple content
                if ((isset($attrs['elements']) && count($attrs['elements']) > 0) || (isset($attrs['attrs']) && count($attrs['attrs']) > 0)) {
                    $contentStr = "  <$schemaPrefix:complexContent>\n" . $contentStr . "  </$schemaPrefix:complexContent>\n";
                }
            }
            // finalize complex type
            if ('' !== $contentStr) {
                $contentStr = " <$schemaPrefix:complexType name=\"$typeName\">\n" . $contentStr . " </$schemaPrefix:complexType>\n";
            } else {
                $contentStr = " <$schemaPrefix:complexType name=\"$typeName\">\n";
            }
            $xml .= $contentStr;
        }
        // simple types
        if (isset($this->simpleTypes) && count($this->simpleTypes) > 0) {
            foreach ($this->simpleTypes as $typeName => $eParts) {
                $xml .= " <$schemaPrefix:simpleType name=\"$typeName\">\n  <$schemaPrefix:restriction base=\"" . $this->contractQName($eParts['type']) . "\">\n";
                if (isset($eParts['enumeration'])) {
                    foreach ($eParts['enumeration'] as $e) {
                        $xml .= "  <$schemaPrefix:enumeration value=\"$e\">\n";
                    }
                }
                $xml .= "  </$schemaPrefix:restriction>\n </$schemaPrefix:simpleType>";
            }
        }
        // elements
        if (isset($this->elements) && count($this->elements) > 0) {
            foreach ($this->elements as $element => $eParts) {
                $xml .= " <$schemaPrefix:element name=\"$element\" type=\"" . $this->contractQName($eParts['type']) . "\">\n";
            }
        }
        // attributes
        if (isset($this->attributes) && count($this->attributes) > 0) {
            foreach ($this->attributes as $attr => $aParts) {
                $xml .= " <$schemaPrefix:attribute name=\"$attr\" type=\"" . $this->contractQName($aParts['type']) . "\"\n>";
            }
        }
        // finish 'er up
        $attr = '';
        foreach ($this->schemaInfo as $k => $v) {
            if ('elementFormDefault' === $k || 'attributeFormDefault' === $k) {
                $attr .= " $k=\"$v\"";
            }
        }
        $el = "<$schemaPrefix:schema$attr targetNamespace=\"$this->schemaTargetNamespace\"\n";
        foreach (array_diff($this->usedNamespaces, $this->enclosingNamespaces) as $nsp => $ns) {
            $el .= " xmlns:$nsp=\"$ns\"";
        }
        $xml = $el . ">\n" . $xml . "</$schemaPrefix:schema>\n";

        return $xml;
    }

    /**
     * Adds debug data to the clas level debug string
     *
     * @param    string $string debug data
     */
    private function xdebug($string)
    {
        $this->debug('<' . $this->schemaTargetNamespace . '> ' . $string);
    }

    /**
     * Get the PHP type of a user defined type in the schema
     * PHP type is kind of a misnomer since it actually returns 'struct' for assoc. arrays
     * Returns false if no type exists, or not w/ the given namespace
     * Else returns a string that is either a native php type, or 'struct'
     *
     * @param string $type name of defined type
     * @param string $ns   namespace of type
     * @return mixed
     * @deprecated
     */
    public function getPHPType($type, $ns)
    {
        if (isset($this->typemap[$ns][$type])) {
            //print "found type '$type' and ns $ns in typemap<br>";
            return $this->typemap[$ns][$type];
        }

        if (isset($this->complexTypes[$type])) {
            //print "getting type '$type' and ns $ns from complexTypes array<br>";
            return $this->complexTypes[$type]['phpType'];
        }

        return false;
    }

    /**
     * Returns an associative array of information about a given type
     * Returns false if no type exists by the given name
     *
     *    For a complexType typeDef = array(
     *    'restrictionBase' => '',
     *    'phpType' => '',
     *    'compositor' => '(sequence|all)',
     *    'elements' => array(), // refs to elements array
     *    'attrs' => array() // refs to attributes array
     *    ... and so on (see addComplexType)
     *    )
     *
     *   For simpleType or element, the array has different keys.
     *
     * @param string $type
     * @return mixed
     * @see    addComplexType
     * @see    addSimpleType
     * @see    addElement
     */
    public function getTypeDef($type)
    {
        $typeDef = [];
        //$this->debug("in getTypeDef for type $type");
        if ('^' === mb_substr($type, -1)) {
            $is_element = 1;
            $type       = mb_substr($type, 0, -1);
        } else {
            $is_element = 0;
        }

        if ((!$is_element) && isset($this->complexTypes[$type])) {
            $this->xdebug("in getTypeDef, found complexType $type");

            return $this->complexTypes[$type];
        }

        if ((!$is_element) && isset($this->simpleTypes[$type])) {
            $this->xdebug("in getTypeDef, found simpleType $type");
            if (!isset($this->simpleTypes[$type]['phpType'])) {
                // get info for type to tack onto the simple type
                // TODO: can this ever really apply (i.e. what is a simpleType really?)
                $uqType = mb_substr($this->simpleTypes[$type]['type'], mb_strrpos($this->simpleTypes[$type]['type'], ':') + 1);
                $ns     = mb_substr($this->simpleTypes[$type]['type'], 0, mb_strrpos($this->simpleTypes[$type]['type'], ':'));

The assignment to $ns is dead and can be removed.

                $etype  = $this->getTypeDef($uqType);
                if ($etype) {
                    $this->xdebug("in getTypeDef, found type for simpleType $type:");
                    $this->xdebug($this->varDump($etype));
                    if (isset($etype['phpType'])) {
                        $this->simpleTypes[$type]['phpType'] = $etype['phpType'];
                    }
                    if (isset($etype['elements'])) {
                        $this->simpleTypes[$type]['elements'] = $etype['elements'];
                    }
                }
            }

            return $this->simpleTypes[$type];
        } elseif (isset($this->elements[$type])) {
            $this->xdebug("in getTypeDef, found element $type");
            if (!isset($this->elements[$type]['phpType'])) {
                // get info for type to tack onto the element
                $uqType = mb_substr($this->elements[$type]['type'], mb_strrpos($this->elements[$type]['type'], ':') + 1);
                $ns     = mb_substr($this->elements[$type]['type'], 0, mb_strrpos($this->elements[$type]['type'], ':'));
                $etype  = $this->getTypeDef($uqType);
                if ($etype) {
                    $this->xdebug("in getTypeDef, found type for element $type:");
                    $this->xdebug($this->varDump($etype));
                    if (isset($etype['phpType'])) {
                        $this->elements[$type]['phpType'] = $etype['phpType'];
                    }
                    if (isset($etype['elements'])) {
                        $this->elements[$type]['elements'] = $etype['elements'];
                    }
                    if (isset($etype['extensionBase'])) {
                        $this->elements[$type]['extensionBase'] = $etype['extensionBase'];
                    }
                } elseif ('http://www.w3.org/2001/XMLSchema' === $ns) {
                    $this->xdebug("in getTypeDef, element $type is an XSD type");
                    $this->elements[$type]['phpType'] = 'scalar';
                }
            }

            return $this->elements[$type];
        } elseif (isset($this->attributes[$type])) {
            $this->xdebug("in getTypeDef, found attribute $type");

            return $this->attributes[$type];
        } elseif (preg_match('/_ContainedType$/', $type)) {
            $this->xdebug("in getTypeDef, have an untyped element $type");
            $typeDef['typeClass'] = 'simpleType';
            $typeDef['phpType']   = 'scalar';
            $typeDef['type']      = 'http://www.w3.org/2001/XMLSchema:string';

            return $typeDef;
        }
        $this->xdebug("in getTypeDef, did not find $type");

        return false;
    }

    /**
     * Returns a sample serialization of a given type, or false if no type by the given name
     *
     * @param string $type name of type
     * @return mixed
     * @deprecated
     */
    public function serializeTypeDef($type)
    {
        $str = '';
        //print "in sTD() for type $type<br>";
        if (false !== ($typeDef = $this->getTypeDef($type))) {
            $str .= '<' . $type;
            if (is_array($typeDef['attrs'])) {
                foreach ($typeDef['attrs'] as $attName => $data) {
                    $str .= " $attName=\"{type = " . $data['type'] . '}"';
                }
            }
            $str .= ' xmlns="' . $this->schema['targetNamespace'] . '"';
            if (is_array($typeDef['elements']) && count($typeDef['elements']) > 0) {
                $str .= '>';
                foreach ($typeDef['elements'] as $element => $eData) {
                    $str .= $this->serializeTypeDef($element);

The function Nusoap_xmlschema::serializeTypeDef() has been deprecated.

                }
                $str .= "</$type>";
            } elseif ('element' === $typeDef['typeClass']) {
                $str .= "></$type>";
            } else {
                $str .= '>';
            }

            return $str;
        }

        return false;
    }

    /**
     * Returns HTML form elements that allow a user
     * to enter values for creating an instance of the given type.
     *
     * @param string $name name for type instance
     * @param string $type name of type
     * @return string
     * @deprecated
     */
    public function typeToForm($name, $type)
    {
        $buffer = '';
        // get typedef
        if (false !== ($typeDef = $this->getTypeDef($type))) {
            // if struct
            if ('struct' === $typeDef['phpType']) {
                $buffer .= '<table>';
                foreach ($typeDef['elements'] as $child => $childDef) {
                    $buffer .= "
					<tr><td align='right'>$childDef[name] (type: " . $this->getLocalPart($childDef['type']) . "):</td>
					<td><input type='text' name='parameters[" . $name . "][$childDef[name]]'></td></tr>";
                }
                $buffer .= '</table>';
            // if array
            } elseif ('array' === $typeDef['phpType']) {
                $buffer .= '<table>';
                for ($i = 0; $i < 3; ++$i) {
                    $buffer .= "
					<tr><td align='right'>array item (type: $typeDef[arrayType]):</td>
					<td><input type='text' name='parameters[" . $name . "][]'></td></tr>";
                }
                $buffer .= '</table>';
            // if scalar
            } else {
                $buffer .= "<input type='text' name='parameters[$name]'>";
            }
        } else {
            $buffer .= "<input type='text' name='parameters[$name]'>";
        }

        return $buffer;
    }

    /**
     * Adds a complex type to the schema
     *
     * Example: array
     *
     * addType(
     *    'ArrayOfstring',
     *    'complexType',
     *    'array',
     *    '',
     *    'SOAP-ENC:Array',
     *    array('ref'=>'SOAP-ENC:arrayType','Wsdl:arrayType'=>'string[]'),
     *    'xsd:string'
     * );
     *
     * Example: PHP associative array ( SOAP Struct )
     *
     * addType(
     *    'SOAPStruct',
     *    'complexType',
     *    'struct',
     *    'all',
     *    array('myVar'=> array('name'=>'myVar','type'=>'string')
     * );
     *
     * @param string $name
     * @param string $typeClass (complexType|simpleType|attribute)
     * @param string $phpType : currently supported are array and struct (php assoc array)
     * @param string $compositor      (all|sequence|choice)
     * @param string $restrictionBase namespace:name (http://schemas.xmlsoap.org/soap/encoding/:Array)
     * @param array  $elements        = array ( name = array(name=>'',type=>'') )
     * @param array  $attrs           = array(
     *                                array(
     *                                'ref' => "http://schemas.xmlsoap.org/soap/encoding/:arrayType",
     *                                "http://schemas.xmlsoap.org/wsdl/:arrayType" => "string[]"
     *                                )
     *                                )
     * @param string $arrayType : namespace:name (http://www.w3.org/2001/XMLSchema:string)
     */
    public function addComplexType($name, $typeClass = 'complexType', $phpType = 'array', $compositor = '', $restrictionBase = '', $elements = [], $attrs = [], $arrayType = '')
    {
        $this->complexTypes[$name] = [
            'name'            => $name,
            'typeClass'       => $typeClass,
            'phpType'         => $phpType,
            'compositor'      => $compositor,
            'restrictionBase' => $restrictionBase,
            'elements'        => $elements,
            'attrs'           => $attrs,
            'arrayType'       => $arrayType,
        ];
        $this->xdebug("addComplexType $name:");
        $this->appendDebug($this->varDump($this->complexTypes[$name]));
    }

    /**
     * Adds a simple type to the schema
     *
     * @param string $name
     * @param string $restrictionBase namespace:name (http://schemas.xmlsoap.org/soap/encoding/:Array)
     * @param string $typeClass       (should always be simpleType)
     * @param string $phpType         (should always be scalar)
     * @param array  $enumeration     array of values
     * @see    nusoap_xmlschema
     * @see    getTypeDef
     */
    public function addSimpleType($name, $restrictionBase = '', $typeClass = 'simpleType', $phpType = 'scalar', $enumeration = [])
    {
        $this->simpleTypes[$name] = [
            'name'        => $name,
            'typeClass'   => $typeClass,
            'phpType'     => $phpType,
            'type'        => $restrictionBase,
            'enumeration' => $enumeration,
        ];
        $this->xdebug("addSimpleType $name:");
        $this->appendDebug($this->varDump($this->simpleTypes[$name]));
    }

    /**
     * Adds an element to the schema
     *
     * @param array $attrs attributes that must include name and type
     * @see    nusoap_xmlschema
     */
    public function addElement($attrs)
    {
        if (!$this->getPrefix($attrs['type'])) {
            $attrs['type'] = $this->schemaTargetNamespace . ':' . $attrs['type'];
        }
        $this->elements[$attrs['name']]              = $attrs;
        $this->elements[$attrs['name']]['typeClass'] = 'element';
        $this->xdebug('addElement ' . $attrs['name']);
        $this->appendDebug($this->varDump($this->elements[$attrs['name']]));
    }
}

/**
 * Backward compatibility
 */
class XMLSchema extends Nusoap_xmlschema
{
}

/**
 * For creating serializable abstractions of native PHP types.  This class
 * allows element name/namespace, XSD type, and XML attributes to be
 * associated with a value.  This is extremely useful when WSDL is not
 * used, but is also useful when WSDL is used with polymorphic types, including
 * xsd:anyType and user-defined types.
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @version  $Id: nusoap.php,v 1.123 2010/04/26 20:15:08 snichol Exp $
 */
class Soapval extends Nusoap_base
{
    /**
     * The XML element name
     *
     * @var string
     */
    private $name;
    /**
     * The XML type name (string or false)
     *
     * @var mixed
     */
    public $type;
    /**
     * The PHP value
     *
     * @var mixed
     */
    public $value;
    /**
     * The XML element namespace (string or false)
     *
     * @var mixed
     */
    private $element_ns;
    /**
     * The XML type namespace (string or false)
     *
     * @var mixed
     */
    public $type_ns;
    /**
     * The XML element attributes (array or false)
     *
     * @var mixed
     */
    public $attributes;

    /**
     * Constructor
     *
     * @param    string $name       optional name
     * @param    mixed  $type       optional type name
     * @param    mixed  $value      optional value
     * @param    mixed  $element_ns optional namespace of value
     * @param    mixed  $type_ns    optional namespace of type
     * @param    mixed  $attributes associative array of attributes to add to element serialization
     */
    public function __construct($name = 'soapval', $type = false, $value = -1, $element_ns = false, $type_ns = false, $attributes = false)
    {
        parent::__construct();
        $this->name       = $name;
        $this->type       = $type;
        $this->value      = $value;
        $this->element_ns = $element_ns;
        $this->type_ns    = $type_ns;
        $this->attributes = $attributes;
    }

    /**
     * Return serialized value
     *
     * @param    string $use The WSDL use value (encoded|literal)
     * @return    string XML data
     */
    public function serialize($use = 'encoded')
    {
        return $this->serialize_val($this->value, $this->name, $this->type, $this->element_ns, $this->type_ns, $this->attributes, $use, true);
    }

    /**
     * Decodes a Soapval object into a PHP native type
     *
     * @return    mixed
     */
    public function decode()
    {
        return $this->value;
    }
}

/**
 * Transport class for sending/receiving data via HTTP and HTTPS
 * NOTE: PHP must be compiled with the CURL extension for HTTPS support
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @author   Scott Nichol <snichol@users.sourceforge.net>
 */
class Soap_transport_http extends Nusoap_base
{
    public $url                  = '';
    public $uri                  = '';
    public $digest_uri           = '';
    public $scheme               = '';
    public $host                 = '';
    public $port                 = 0;
    public $path                 = '';
    public $request_method       = 'POST';
    public $protocol_version     = '1.0';
    public $encoding             = '';
    public $outgoing_headers     = [];
    public $incoming_headers     = [];
    public $incoming_cookies     = [];
    public $outgoing_payload     = '';
    public $incoming_payload     = '';
    public $response_status_line;    // HTTP response status line
    public $useSOAPAction        = true;
    public $persistentConnection = false;
    public $ch                   = false;    // cURL handle
    public $ch_options           = [];    // cURL custom options
    public $use_curl             = false;        // force cURL use
    public $proxy;            // proxy information (associative array)
    public $username             = '';
    public $password             = '';
    public $authtype             = '';
    public $digestRequest        = [];
    public $certRequest          = [];
    public $tryagain;
    // keys must be cainfofile (optional), sslcertfile, sslkeyfile, passphrase, certpassword (optional), verifypeer (optional), verifyhost (optional)
    // cainfofile: certificate authority file, e.g. '$pathToPemFiles/rootca.pem'
    // sslcertfile: SSL certificate file, e.g. '$pathToPemFiles/mycert.pem'
    // sslkeyfile: SSL key file, e.g. '$pathToPemFiles/mykey.pem'
    // passphrase: SSL key password/passphrase
    // certpassword: SSL certificate password
    // verifypeer: default is 1
    // verifyhost: default is 1

    /**
     * Constructor
     *
     * @param string $url          The URL to which to connect
     * @param array  $curl_options User-specified cURL options
     * @param bool   $use_curl     Whether to try to force cURL use
     */
    public function __construct($url, $curl_options = null, $use_curl = false)
    {
        parent::__construct();
        $this->debug("ctor url=$url use_curl=$use_curl curl_options:");
        $this->appendDebug($this->varDump($curl_options));
        $this->setURL($url);
        if (is_array($curl_options)) {
            $this->ch_options = $curl_options;
        }
        $this->use_curl = $use_curl;
        preg_match('/\$Revisio' . 'n: ([^ ]+)/', $this->revision, $rev);
        $this->setHeader('User-Agent', $this->title . '/' . $this->version . ' (' . $rev[1] . ')');
    }

    /**
     * Sets a cURL option
     *
     * @param    mixed $option The cURL option (always integer?)
     * @param    mixed $value  The cURL option value
     */
    private function setCurlOption($option, $value)
    {
        $this->debug("setCurlOption option=$option, value=");
        $this->appendDebug($this->varDump($value));
        curl_setopt($this->ch, $option, $value);

$this->ch of type boolean is incompatible with the type resource expected by parameter $ch of curl_setopt().

    }

    /**
     * Sets an HTTP header
     *
     * @param string $name  The name of the header
     * @param string $value The value of the header
     */
    private function setHeader($name, $value)
    {
        $this->outgoing_headers[$name] = $value;
        $this->debug("set header $name: $value");
    }

    /**
     * Unsets an HTTP header
     *
     * @param string $name The name of the header
     */
    private function unsetHeader($name)
    {
        if (isset($this->outgoing_headers[$name])) {
            $this->debug("unset header $name");
            unset($this->outgoing_headers[$name]);
        }
    }

    /**
     * Sets the URL to which to connect
     *
     * @param string $url The URL to which to connect
     */
    private function setURL($url)
    {
        $this->url = $url;
        $u         = parse_url($url);
        foreach ($u as $k => $v) {
            $this->debug("parsed URL $k = $v");
            $this->$k = $v;
        }

        // add any GET params to path
        if (isset($u['query']) && '' !== $u['query']) {
            $this->path .= '?' . $u['query'];
        }

        // set default port
        if (!isset($u['port'])) {
            $this->port = 80;
            if ('https' === $u['scheme']) {
                $this->port = 443;
            }
        }

        $this->uri        = $this->path;
        $this->digest_uri = $this->uri;
        // build headers
        if (!isset($u['port'])) {
            $this->setHeader('Host', $this->host);
        } else {
            $this->setHeader('Host', $this->host . ':' . $this->port);
        }

        if (isset($u['user']) && '' !== $u['user']) {
            $this->setCredentials(urldecode($u['user']), isset($u['pass']) ? urldecode($u['pass']) : '');
        }
    }

    /**
     * Gets the I/O method to use
     *
     * @return    string    I/O method to use (socket|curl|unknown)
     */
    private function io_method()
    {
        if ($this->use_curl || ('https' === $this->scheme) || ('http' === $this->scheme && 'ntlm' === $this->authtype) || ('http' === $this->scheme && is_array($this->proxy) && 'ntlm' === $this->proxy['authtype'])) {
            return 'curl';
        }
        if (('http' === $this->scheme || 'ssl' === $this->scheme) && 'ntlm' !== $this->authtype && (!is_array($this->proxy) || 'ntlm' !== $this->proxy['authtype'])) {
            return 'socket';
        }

        return 'unknown';
    }

    /**
     * Establish an HTTP connection
     *
     * @param int $connection_timeout set connection timeout in seconds
     * @param int $response_timeout   set response timeout in seconds
     * @return bool true if connected, false if not
     */
    private function connect($connection_timeout = 0, $response_timeout = 30)
    {
        // For PHP 4.3 with OpenSSL, change https scheme to ssl, then treat like
        // "regular" socket.
        // TODO: disabled for now because OpenSSL must be *compiled* in (not just
        //       loaded), and until PHP5 stream_get_wrappers is not available.
        //	  	if ($this->scheme == 'https') {
        //          if (version_compare(PHP_VERSION, '4.3.0') >= 0) {
        //		  		if (extension_loaded('openssl')) {
        //		  			$this->scheme = 'ssl';
        //		  			$this->debug('Using SSL over OpenSSL');
        //		  		}
        //		  	}
        //		}
        $this->debug("connect connection_timeout $connection_timeout, response_timeout $response_timeout, scheme $this->scheme, host $this->host, port $this->port");
        if ('socket' === $this->io_method()) {
            if (!is_array($this->proxy)) {
                $host = $this->host;
                $port = $this->port;

The assignment to $port is dead and can be removed.

            } else {
                $host = $this->proxy['host'];
                $port = $this->proxy['port'];
            }

            // use persistent connection
            if ($this->persistentConnection && isset($this->fp) && is_resource($this->fp)) {
                if (!feof($this->fp)) {
                    $this->debug('Re-use persistent connection');

                    return true;
                }
                fclose($this->fp);
                $this->debug('Closed persistent connection at EOF');
            }

            // munge host if using OpenSSL
            if ('ssl' === $this->scheme) {
                $host = 'ssl://' . $host;
            }
            $this->debug('calling fsockopen with host ' . $host . ' connection_timeout ' . $connection_timeout);
            // open socket
            if ($connection_timeout > 0) {
                $this->fp = @fsockopen($host, $this->port, $this->errno, $this->error_str, $connection_timeout);

The property fp does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

The property errno does not exist on Soap_transport_http. Did you maybe forget to declare it?

            } else {
                $this->fp = @fsockopen($host, $this->port, $this->errno, $this->error_str);
            }

            // test pointer
            if (!$this->fp) {
                $msg = 'Couldn\'t open socket connection to server ' . $this->url;
                if ($this->errno) {
                    $msg .= ', Error (' . $this->errno . '): ' . $this->error_str;
                } else {
                    $msg .= ' prior to connect().  This is often a problem looking up the host name.';
                }
                $this->debug($msg);
                $this->setError($msg);

                return false;
            }

            // set response timeout
            $this->debug('set response timeout to ' . $response_timeout);
            stream_set_timeout($this->fp, $response_timeout);
            $this->debug('socket connected');

            return true;
        }
        if ('curl' === $this->io_method()) {
            if (!extension_loaded('curl')) {
                //			$this->setError('cURL Extension, or OpenSSL extension w/ PHP version >= 4.3 is required for HTTPS');
                $this->setError('The PHP cURL Extension is required for HTTPS or NLTM.  You will need to re-build or update your PHP to include cURL or change php.ini to load the PHP cURL extension.');

                return false;
            }
            // Avoid warnings when PHP does not have these options
            $CURLOPT_CONNECTIONTIMEOUT = 78;
            if (defined('CURLOPT_CONNECTIONTIMEOUT')) {
                $CURLOPT_CONNECTIONTIMEOUT = CURLOPT_CONNECTIONTIMEOUT;

The constant CURLOPT_CONNECTIONTIMEOUT was not found. Maybe you did not declare it correctly or list all dependencies?

            }
            $CURLOPT_HTTPAUTH = 107;
            if (defined('CURLOPT_HTTPAUTH')) {
                $CURLOPT_HTTPAUTH = CURLOPT_HTTPAUTH;
            }
            $CURLOPT_PROXYAUTH = 111;
            if (defined('CURLOPT_PROXYAUTH')) {
                $CURLOPT_PROXYAUTH = CURLOPT_PROXYAUTH;
            }
            $CURLAUTH_BASIC = 1;
            if (defined('CURLAUTH_BASIC')) {
                $CURLAUTH_BASIC = CURLAUTH_BASIC;
            }
            $CURLAUTH_DIGEST = 2;
            if (defined('CURLAUTH_DIGEST')) {
                $CURLAUTH_DIGEST = CURLAUTH_DIGEST;
            }
            $CURLAUTH_NTLM = 8;
            if (defined('CURLAUTH_NTLM')) {
                $CURLAUTH_NTLM = CURLAUTH_NTLM;
            }

            $this->debug('connect using cURL');
            // init CURL
            $this->ch = curl_init();
            // set url
            $hostURL = (0 !== $this->port) ? "$this->scheme://$this->host:$this->port" : "$this->scheme://$this->host";
            // add path
            $hostURL .= $this->path;
            $this->setCurlOption(CURLOPT_URL, $hostURL);
            // follow location headers (re-directs)
            $this->setCurlOption(CURLOPT_FOLLOWLOCATION, 1);
            // ask for headers in the response output
            $this->setCurlOption(CURLOPT_HEADER, 1);
            // ask for the response output as the return value
            $this->setCurlOption(CURLOPT_RETURNTRANSFER, 1);
            // encode
            // We manage this ourselves through headers and encoding
            //		if(function_exists('gzuncompress')){
            //			$this->setCurlOption(CURLOPT_ENCODING, 'deflate');
            //		}
            // persistent connection
            if ($this->persistentConnection) {
                // I believe the following comment is now bogus, having applied to
                // the code when it used CURLOPT_CUSTOMREQUEST to send the request.
                // The way we send data, we cannot use persistent connections, since
                // there will be some "junk" at the end of our request.
                //$this->setCurlOption(CURL_HTTP_VERSION_1_1, true);
                $this->persistentConnection = false;
                $this->setHeader('Connection', 'close');
            }
            // set timeouts
            if (0 !== $connection_timeout) {
                $this->setCurlOption($CURLOPT_CONNECTIONTIMEOUT, $connection_timeout);
            }
            if (0 !== $response_timeout) {
                $this->setCurlOption(CURLOPT_TIMEOUT, $response_timeout);
            }

            if ('https' === $this->scheme) {
                $this->debug('set cURL SSL verify options');
                // recent versions of cURL turn on peer/host checking by default,
                // while PHP binaries are not compiled with a default location for the
                // CA cert bundle, so disable peer/host checking.
                //$this->setCurlOption(CURLOPT_CAINFO, 'f:\php-4.3.2-win32\extensions\curl-ca-bundle.crt');
                $this->setCurlOption(CURLOPT_SSL_VERIFYPEER, 0);
                $this->setCurlOption(CURLOPT_SSL_VERIFYHOST, 0);
                // support client certificates (thanks Tobias Boes, Doug Anarino, Eryan Ariobowo)
                if ('certificate' === $this->authtype) {
                    $this->debug('set cURL certificate options');
                    if (isset($this->certRequest['cainfofile'])) {
                        $this->setCurlOption(CURLOPT_CAINFO, $this->certRequest['cainfofile']);
                    }
                    if (isset($this->certRequest['verifypeer'])) {
                        $this->setCurlOption(CURLOPT_SSL_VERIFYPEER, $this->certRequest['verifypeer']);
                    } else {
                        $this->setCurlOption(CURLOPT_SSL_VERIFYPEER, 1);
                    }
                    if (isset($this->certRequest['verifyhost'])) {
                        $this->setCurlOption(CURLOPT_SSL_VERIFYHOST, $this->certRequest['verifyhost']);
                    } else {
                        $this->setCurlOption(CURLOPT_SSL_VERIFYHOST, 1);
                    }
                    if (isset($this->certRequest['sslcertfile'])) {
                        $this->setCurlOption(CURLOPT_SSLCERT, $this->certRequest['sslcertfile']);
                    }
                    if (isset($this->certRequest['sslkeyfile'])) {
                        $this->setCurlOption(CURLOPT_SSLKEY, $this->certRequest['sslkeyfile']);
                    }
                    if (isset($this->certRequest['passphrase'])) {
                        $this->setCurlOption(CURLOPT_SSLKEYPASSWD, $this->certRequest['passphrase']);
                    }
                    if (isset($this->certRequest['certpassword'])) {
                        $this->setCurlOption(CURLOPT_SSLCERTPASSWD, $this->certRequest['certpassword']);
                    }
                }
            }
            if ($this->authtype && ('certificate' !== $this->authtype)) {
                if ($this->username) {
                    $this->debug('set cURL username/password');
                    $this->setCurlOption(CURLOPT_USERPWD, "$this->username:$this->password");
                }
                if ('basic' === $this->authtype) {
                    $this->debug('set cURL for Basic authentication');
                    $this->setCurlOption($CURLOPT_HTTPAUTH, $CURLAUTH_BASIC);
                }
                if ('digest' === $this->authtype) {
                    $this->debug('set cURL for digest authentication');
                    $this->setCurlOption($CURLOPT_HTTPAUTH, $CURLAUTH_DIGEST);
                }
                if ('ntlm' === $this->authtype) {
                    $this->debug('set cURL for NTLM authentication');
                    $this->setCurlOption($CURLOPT_HTTPAUTH, $CURLAUTH_NTLM);
                }
            }
            if (is_array($this->proxy)) {
                $this->debug('set cURL proxy options');
                if ('' !== $this->proxy['port']) {
                    $this->setCurlOption(CURLOPT_PROXY, $this->proxy['host'] . ':' . $this->proxy['port']);
                } else {
                    $this->setCurlOption(CURLOPT_PROXY, $this->proxy['host']);
                }
                if ($this->proxy['username'] || $this->proxy['password']) {
                    $this->debug('set cURL proxy authentication options');
                    $this->setCurlOption(CURLOPT_PROXYUSERPWD, $this->proxy['username'] . ':' . $this->proxy['password']);
                    if ('basic' === $this->proxy['authtype']) {
                        $this->setCurlOption($CURLOPT_PROXYAUTH, $CURLAUTH_BASIC);
                    }
                    if ('ntlm' === $this->proxy['authtype']) {
                        $this->setCurlOption($CURLOPT_PROXYAUTH, $CURLAUTH_NTLM);
                    }
                }
            }
            $this->debug('cURL connection set up');

            return true;
        }
            $this->setError('Unknown scheme ' . $this->scheme);
            $this->debug('Unknown scheme ' . $this->scheme);

            return false;
        }

    /**
     * Sends the SOAP request and gets the SOAP response via HTTP[S]
     *
     * @param    string $data             message data
     * @param int       $timeout          set connection timeout in seconds
     * @param int       $response_timeout set response timeout in seconds
     * @param    array  $cookies          cookies to send
     * @return    string|bool data
     */
    public function send($data, $timeout = 0, $response_timeout = 30, $cookies = null)
    {
        $this->debug('entered send() with data of length: ' . mb_strlen($data));
        $this->tryagain = true;
        $tries          = 0;
        $respdata = '';
        while ($this->tryagain) {
            $this->tryagain = false;
            if (++$tries < 2) {
                // make connnection
                if (!$this->connect($timeout, $response_timeout)) {
                    return false;
                }

                // send request
                if (!$this->sendRequest($data, $cookies)) {
                    return false;
                }

                // get response
                $respdata = $this->getResponse();
            } else {
                $this->setError("Too many tries to get an OK response ($this->response_status_line)");
            }
        }
        $this->debug('end of send()');

        return $respdata;
    }

    /**
     * Sends the SOAP request and gets the SOAP response via HTTPS using CURL
     *
     * @param    string $data             message data
     * @param int       $timeout          set connection timeout in seconds
     * @param int       $response_timeout set response timeout in seconds
     * @param    array  $cookies          cookies to send
     * @return    string|bool data
     * @deprecated
     */
    public function sendHTTPS($data, $timeout = 0, $response_timeout = 30, $cookies = [])
    {
        return $this->send($data, $timeout, $response_timeout, $cookies);
    }

    /**
     * If authenticating, set user credentials here
     *
     * @param    string $username
     * @param    string $password
     * @param    string $authtype      (basic|digest|certificate|ntlm)
     * @param    array  $digestRequest (keys must be nonce, nc, realm, qop)
     * @param    array  $certRequest   (keys must be cainfofile (optional), sslcertfile, sslkeyfile, passphrase, certpassword (optional), verifypeer (optional), verifyhost (optional): see corresponding options in cURL docs)
     */
    public function setCredentials($username, $password, $authtype = 'basic', $digestRequest = [], $certRequest = [])
    {
        $this->debug("setCredentials username=$username authtype=$authtype digestRequest=");
        $this->appendDebug($this->varDump($digestRequest));
        $this->debug('certRequest=');
        $this->appendDebug($this->varDump($certRequest));
        // cf. RFC 2617
        if ('basic' === $authtype) {
            $this->setHeader('Authorization', 'Basic ' . base64_encode(str_replace(':', '', $username) . ':' . $password));
        } elseif ('digest' === $authtype) {
            if (isset($digestRequest['nonce'])) {
                $digestRequest['nc'] = isset($digestRequest['nc']) ? $digestRequest['nc']++ : 1;
                // calculate the Digest hashes (calculate code based on digest implementation found at: http://www.rassoc.com/gregr/weblog/stories/2002/07/09/webServicesSecurityHttpDigestAuthenticationWithoutActiveDirectory.html)

                // A1 = unq(username-value) ":" unq(realm-value) ":" passwd
                $A1 = $username . ':' . (isset($digestRequest['realm']) ? $digestRequest['realm'] : '') . ':' . $password;

                // H(A1) = MD5(A1)
                $HA1 = md5($A1);
                // A2 = Method ":" digest-uri-value
                $A2 = $this->request_method . ':' . $this->digest_uri;

Are you sure $this->digest_uri of type mixed can be used in concatenation?

                // H(A2)
                $HA2 = md5($A2);
                // KD(secret, data) = H(concat(secret, ":", data))
                // if qop == auth:
                // request-digest  = <"> < KD ( H(A1),     unq(nonce-value)
                //                              ":" nc-value
                //                              ":" unq(cnonce-value)
                //                              ":" unq(qop-value)
                //                              ":" H(A2)
                //                            ) <">
                // if qop is missing,
                // request-digest  = <"> < KD ( H(A1), unq(nonce-value) ":" H(A2) ) > <">

                $unhashedDigest = '';
                $nonce          = isset($digestRequest['nonce']) ? $digestRequest['nonce'] : '';
                $cnonce         = $nonce;
                if ('' !== $digestRequest['qop']) {
                    $unhashedDigest = $HA1 . ':' . $nonce . ':' . sprintf('%08d', $digestRequest['nc']) . ':' . $cnonce . ':' . $digestRequest['qop'] . ':' . $HA2;
                } else {
                    $unhashedDigest = $HA1 . ':' . $nonce . ':' . $HA2;
                }

                $hashedDigest = md5($unhashedDigest);
                $opaque       = '';
                if (isset($digestRequest['opaque'])) {
                    $opaque = ', opaque="' . $digestRequest['opaque'] . '"';
                }

                $this->setHeader('Authorization', 'Digest username="'
                                                  . $username
                                                  . '", realm="'
                                                  . $digestRequest['realm']
                                                  . '", nonce="'
                                                  . $nonce
                                                  . '", uri="'
                                                  . $this->digest_uri
                                                  . $opaque
                                                  . '", cnonce="'
                                                  . $cnonce
                                                  . '", nc='
                                                  . sprintf('%08x', $digestRequest['nc'])
                                                  . ', qop="'
                                                  . $digestRequest['qop']
                                                  . '", response="'
                                                  . $hashedDigest
                                                  . '"');
            }
        } elseif ('certificate' === $authtype) {
            $this->certRequest = $certRequest;
            $this->debug('Authorization header not set for certificate');
        } elseif ('ntlm' === $authtype) {
            // do nothing
            $this->debug('Authorization header not set for ntlm');
        }
        $this->username      = $username;
        $this->password      = $password;
        $this->authtype      = $authtype;
        $this->digestRequest = $digestRequest;
    }

    /**
     * Set the soapaction value
     *
     * @param    string $soapaction
     */
    public function setSOAPAction($soapaction)
    {
        $this->setHeader('SOAPAction', '"' . $soapaction . '"');
    }

    /**
     * Use http encoding
     *
     * @param    string $enc encoding style. supported values: gzip, deflate, or both
     */
    public function setEncoding($enc = 'gzip, deflate')
    {
        if (function_exists('gzdeflate')) {
            $this->protocol_version = '1.1';
            $this->setHeader('Accept-Encoding', $enc);
            if (!isset($this->outgoing_headers['Connection'])) {
                $this->setHeader('Connection', 'close');
                $this->persistentConnection = false;
            }
            // deprecated as of PHP 5.3.0
            //set_magic_quotes_runtime(0);
            $this->encoding = $enc;
        }
    }

    /**
     * Set proxy info here
     *
     * @param    bool|string $proxyhost     use an empty string to remove proxy
     * @param    bool|string $proxyport
     * @param    bool|string $proxyusername
     * @param    bool|string $proxypassword
     * @param    bool|string $proxyauthtype (basic|ntlm)
     */
    public function setProxy($proxyhost, $proxyport, $proxyusername = '', $proxypassword = '', $proxyauthtype = 'basic')
    {
        if ($proxyhost) {
            $this->proxy = [
                'host'     => $proxyhost,
                'port'     => $proxyport,
                'username' => $proxyusername,
                'password' => $proxypassword,
                'authtype' => $proxyauthtype,
            ];
            if ('' !== $proxyusername && '' !== $proxypassword && $proxyauthtype = 'basic') {

The assignment to $proxyauthtype is dead and can be removed.

                $this->setHeader('Proxy-Authorization', ' Basic ' . base64_encode($proxyusername . ':' . $proxypassword));
            }
        } else {
            $this->debug('remove proxy');
            $proxy = null;

The assignment to $proxy is dead and can be removed.

            $this->unsetHeader('Proxy-Authorization');
        }
    }

    /**
     * Test if the given string starts with a header that is to be skipped.
     * Skippable headers result from chunked transfer and proxy requests.
     *
     * @param    string $data The string to check.
     * @returns    boolean    Whether a skippable header was found.
     * @return bool
     */
    private function isSkippableCurlHeader(&$data)
    {
        $skipHeaders = [
            'HTTP/1.1 100',
            'HTTP/1.0 301',
            'HTTP/1.1 301',
            'HTTP/1.0 302',
            'HTTP/1.1 302',
            'HTTP/1.0 401',
            'HTTP/1.1 401',
            'HTTP/1.0 200 Connection established',
        ];
        foreach ($skipHeaders as $hd) {
            $prefix = mb_substr($data, 0, mb_strlen($hd));
            if ($prefix === $hd) {
                return true;
            }
        }

        return false;
    }

    /**
     * Decode a string that is encoded w/ "chunked' transfer encoding
     * as defined in RFC2068 19.4.6
     *
     * @param    string $buffer
     * @param    string $lb
     * @returns    string
     * @deprecated
     * @return string
     */
    public function decodeChunked($buffer, $lb)
    {
        // length := 0
        $length = 0;
        $new    = '';
        // read chunk-size, chunk-extension (if any) and CRLF
        // get the position of the linebreak
        $chunkend = mb_strpos($buffer, $lb);
        if (false === $chunkend) {
            $this->debug('no linebreak found in decodeChunked');

            return $new;
        }
        $temp       = mb_substr($buffer, 0, $chunkend);
        $chunk_size = hexdec(trim($temp));
        $chunkstart = $chunkend + mb_strlen($lb);
        // while (chunk-size > 0) {
        while ($chunk_size > 0) {
            $this->debug("chunkstart: $chunkstart chunk_size: $chunk_size");
            $chunkend = mb_strpos($buffer, $lb, $chunkstart + $chunk_size);

$chunkstart + $chunk_size of type double is incompatible with the type integer expected by parameter $offset of mb_strpos().

            // Just in case we got a broken connection
            if (false === $chunkend) {
                $chunk = mb_substr($buffer, $chunkstart);
                // append chunk-data to entity-body
                $new    .= $chunk;
                $length += mb_strlen($chunk);
                break;
            }

            // read chunk-data and CRLF
            $chunk = mb_substr($buffer, $chunkstart, $chunkend - $chunkstart);
            // append chunk-data to entity-body
            $new .= $chunk;
            // length := length + chunk-size
            $length += mb_strlen($chunk);
            // read chunk-size and CRLF
            $chunkstart = $chunkend + mb_strlen($lb);
            $chunkend   = mb_strpos($buffer, $lb, $chunkstart) + mb_strlen($lb);
            if (false === $chunkend) {
                break; //Just in case we got a broken connection
            }
            $temp       = mb_substr($buffer, $chunkstart, $chunkend - $chunkstart);
            $chunk_size = hexdec(trim($temp));
            $chunkstart = $chunkend;
        }

        return $new;
    }

    /**
     * Writes the payload, including HTTP headers, to $this->outgoing_payload.
     *
     * @param    string $data       HTTP body
     * @param    string $cookie_str data for HTTP Cookie header
     */
    private function buildPayload($data, $cookie_str = '')
    {
        // Note: for cURL connections, $this->outgoing_payload is ignored,
        // as is the Content-Length header, but these are still created as
        // debugging guides.

        // add content-length header
        if ('GET' !== $this->request_method) {
            $this->setHeader('Content-Length', mb_strlen($data));
        }

        // start building outgoing payload:
        if ($this->proxy) {
            $uri = $this->url;
        } else {
            $uri = $this->uri;
        }
        $req = "$this->request_method $uri HTTP/$this->protocol_version";
        $this->debug("HTTP request: $req");
        $this->outgoing_payload = "$req\r\n";
        // loop thru headers, serializing
        foreach ($this->outgoing_headers as $k => $v) {
            $hdr = $k . ': ' . $v;
            $this->debug("HTTP header: $hdr");
            $this->outgoing_payload .= "$hdr\r\n";
        }

        // add any cookies
        if ('' !== $cookie_str) {
            $hdr = 'Cookie: ' . $cookie_str;
            $this->debug("HTTP header: $hdr");
            $this->outgoing_payload .= "$hdr\r\n";
        }

        // header/body separator
        $this->outgoing_payload .= "\r\n";
        // add data
        $this->outgoing_payload .= $data;
    }

    /**
     * Sends the SOAP request via HTTP[S]
     *
     * @param    string $data    message data
     * @param    array  $cookies cookies to send
     * @return bool    true if OK, false if problem
     */
    private function sendRequest($data, $cookies = null)
    {
        // build cookie string
        $cookie_str = $this->getCookiesForRequest($cookies, ('ssl' === $this->scheme) || ('https' === $this->scheme));
        // build payload
        $this->buildPayload($data, $cookie_str);
        if ('socket' === $this->io_method()) {
            // send payload
            if (!fwrite($this->fp, $this->outgoing_payload, mb_strlen($this->outgoing_payload))) {
                $this->setError('couldn\'t write message data to socket');
                $this->debug('couldn\'t write message data to socket');

                return false;
            }
            $this->debug('wrote data to socket, length = ' . mb_strlen($this->outgoing_payload));

            return true;
        }

        if ('curl' === $this->io_method()) {
            // set payload
            // cURL does say this should only be the verb, and in fact it
            // turns out that the URI and HTTP version are appended to this, which
            // some servers refuse to work with (so we no longer use this method!)
            //$this->setCurlOption(CURLOPT_CUSTOMREQUEST, $this->outgoing_payload);
            $curl_headers = [];
            foreach ($this->outgoing_headers as $k => $v) {
                if ('Connection' === $k || 'Content-Length' === $k || 'Host' === $k || 'Authorization' === $k || 'Proxy-Authorization' === $k) {
                    $this->debug("Skip cURL header $k: $v");
                } else {
                    $curl_headers[] = "$k: $v";
                }
            }
            if ('' !== $cookie_str) {
                $curl_headers[] = 'Cookie: ' . $cookie_str;
            }
            $this->setCurlOption(CURLOPT_HTTPHEADER, $curl_headers);
            $this->debug('set cURL HTTP headers');
            if ('POST' === $this->request_method) {
                $this->setCurlOption(CURLOPT_POST, 1);
                $this->setCurlOption(CURLOPT_POSTFIELDS, $data);
                $this->debug('set cURL POST data');
            }

            // insert custom user-set cURL options
            foreach ($this->ch_options as $key => $val) {
                $this->setCurlOption($key, $val);
            }

            $this->debug('set cURL payload');

            return true;
        }
    }

    /**
     * Gets the SOAP response via HTTP[S]
     *
     * @return    string|bool the response (also sets member variables like incoming_payload)
     */
    private function getResponse()
    {
        $header_array = [];
        $this->incoming_payload = '';
        if ('socket' === $this->io_method()) {
            // loop until headers have been retrieved
            $data = '';
            while (!isset($lb)) {
                // We might EOF during header read.
                if (feof($this->fp)) {
                    $this->incoming_payload = $data;
                    $this->debug('found no headers before EOF after length ' . mb_strlen($data));
                    $this->debug("received before EOF:\n" . $data);
                    $this->setError('server failed to send headers');

                    return false;
                }

                $tmp    = fgets($this->fp, 256);
                $tmplen = mb_strlen($tmp);
                $this->debug("read line of $tmplen bytes: " . trim($tmp));
                if (0 === $tmplen) {
                    $this->incoming_payload = $data;
                    $this->debug('socket read of headers timed out after length ' . mb_strlen($data));
                    $this->debug('read before timeout: ' . $data);
                    $this->setError('socket read of headers timed out');

                    return false;
                }

                $data .= $tmp;
                $pos  = mb_strpos($data, "\r\n\r\n");
                if ($pos > 1) {
                    $lb = "\r\n";
                } else {
                    $pos = mb_strpos($data, "\n\n");
                    if ($pos > 1) {
                        $lb = "\n";
                    }
                }
                // remove 100 headers
                if (isset($lb) && preg_match('/^HTTP\/1.1 100/', $data)) {
                    unset($lb);
                    $data = '';
                }
            }
            // store header data
            $this->incoming_payload .= $data;
            $this->debug('found end of headers after length ' . mb_strlen($data));
            // process headers
            $header_data            = trim(mb_substr($data, 0, $pos));

The variable $pos does not seem to be defined for all execution paths leading up to this point.

            $header_array           = explode($lb, $header_data);

The variable $lb does not seem to be defined for all execution paths leading up to this point.

            $this->incoming_headers = [];
            $this->incoming_cookies = [];
            foreach ($header_array as $header_line) {
                $arr = explode(':', $header_line, 2);
                if (is_array($arr) && count($arr) > 1) {
                    $header_name                          = mb_strtolower(trim($arr[0]));
                    $this->incoming_headers[$header_name] = trim($arr[1]);
                    if ('set-cookie' === $header_name) {
                        // TODO: allow multiple cookies from parseCookie
                        $cookie = $this->parseCookie(trim($arr[1]));
                        if ($cookie) {
                            $this->incoming_cookies[] = $cookie;
                            $this->debug('found cookie: ' . $cookie['name'] . ' = ' . $cookie['value']);
                        } else {
                            $this->debug('did not find cookie in ' . trim($arr[1]));
                        }
                    }
                } elseif (isset($header_name)) {
                    // append continuation line to previous header
                    $this->incoming_headers[$header_name] .= $lb . ' ' . $header_line;
                }
            }

            // loop until msg has been received
            if (isset($this->incoming_headers['transfer-encoding']) && 'chunked' === mb_strtolower($this->incoming_headers['transfer-encoding'])) {
                $content_length = 2147483647;    // ignore any content-length header
                $chunked        = true;
                $this->debug('want to read chunked content');
            } elseif (isset($this->incoming_headers['content-length'])) {
                $content_length = $this->incoming_headers['content-length'];
                $chunked        = false;
                $this->debug("want to read content of length $content_length");
            } else {
                $content_length = 2147483647;
                $chunked        = false;
                $this->debug('want to read content to EOF');
            }
            $data = '';
            do {
                if ($chunked) {
                    $tmp    = fgets($this->fp, 256);
                    $tmplen = mb_strlen($tmp);
                    $this->debug("read chunk line of $tmplen bytes");
                    if (0 === $tmplen) {
                        $this->incoming_payload = $data;
                        $this->debug('socket read of chunk length timed out after length ' . mb_strlen($data));
                        $this->debug("read before timeout:\n" . $data);
                        $this->setError('socket read of chunk length timed out');

                        return false;
                    }
                    $content_length = hexdec(trim($tmp));
                    $this->debug("chunk length $content_length");
                }
                $strlen = 0;
                while (($strlen < $content_length) && (!feof($this->fp))) {
                    $readlen = min(8192, $content_length - $strlen);
                    $tmp     = fread($this->fp, $readlen);
                    $tmplen  = mb_strlen($tmp);
                    $this->debug("read buffer of $tmplen bytes");
                    if ((0 === $tmplen) && (!feof($this->fp))) {
                        $this->incoming_payload = $data;
                        $this->debug('socket read of body timed out after length ' . mb_strlen($data));
                        $this->debug("read before timeout:\n" . $data);
                        $this->setError('socket read of body timed out');

                        return false;
                    }
                    $strlen += $tmplen;
                    $data   .= $tmp;
                }
                if ($chunked && ($content_length > 0)) {
                    $tmp    = fgets($this->fp, 256);
                    $tmplen = mb_strlen($tmp);
                    $this->debug("read chunk terminator of $tmplen bytes");
                    if (0 === $tmplen) {
                        $this->incoming_payload = $data;
                        $this->debug('socket read of chunk terminator timed out after length ' . mb_strlen($data));
                        $this->debug("read before timeout:\n" . $data);
                        $this->setError('socket read of chunk terminator timed out');

                        return false;
                    }
                }
            } while ($chunked && ($content_length > 0) && (!feof($this->fp)));
            if (feof($this->fp)) {
                $this->debug('read to EOF');
            }
            $this->debug('read body of length ' . mb_strlen($data));
            $this->incoming_payload .= $data;
            $this->debug('received a total of ' . mb_strlen($this->incoming_payload) . ' bytes of data from server');
            // close filepointer
            if ((isset($this->incoming_headers['connection']) && 'close' === mb_strtolower($this->incoming_headers['connection'])) || (!$this->persistentConnection) || feof($this->fp)) {
                fclose($this->fp);
                $this->fp = false;

The property fp does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                $this->debug('closed socket');
            }

            // connection was closed unexpectedly
            if ('' === $this->incoming_payload) {
                $this->setError('no response from server');

                return false;
            }

            // decode transfer-encoding
            //		if(isset($this->incoming_headers['transfer-encoding']) && strtolower($this->incoming_headers['transfer-encoding']) == 'chunked'){
            //			if(!$data = $this->decodeChunked($data, $lb)){
            //				$this->setError('Decoding of chunked data failed');
            //				return false;
            //			}
            //print "<pre>\nde-chunked:\n---------------\n$data\n\n---------------\n</pre>";
            // set decoded payload
            //			$this->incoming_payload = $header_data.$lb.$lb.$data;
            //		}
        } elseif ('curl' === $this->io_method()) {
            // send and receive
            $this->debug('send and receive with cURL');
            $this->incoming_payload = curl_exec($this->ch);

$this->ch of type boolean is incompatible with the type resource expected by parameter $ch of curl_exec().

            $data                   = $this->incoming_payload;
            $cErr                   = curl_error($this->ch);

$this->ch of type boolean is incompatible with the type resource expected by parameter $ch of curl_error().

            if ('' !== $cErr) {
                $err = 'cURL ERROR: ' . curl_errno($this->ch) . ': ' . $cErr . '<br>';

$this->ch of type boolean is incompatible with the type resource expected by parameter $ch of curl_errno().

                // TODO: there is a PHP bug that can cause this to SEGV for CURLINFO_CONTENT_TYPE
                foreach (curl_getinfo($this->ch) as $k => $v) {

$this->ch of type boolean is incompatible with the type resource expected by parameter $ch of curl_getinfo().

                    $err .= "$k: $v<br>";
                }
                $this->debug($err);
                $this->setError($err);
                curl_close($this->ch);

$this->ch of type boolean is incompatible with the type resource expected by parameter $ch of curl_close().

                return false;
            }

            //echo '<pre>';
            //var_dump(curl_getinfo($this->ch));
            //echo '</pre>';
            // close curl
            $this->debug('No cURL error, closing cURL');
            curl_close($this->ch);
            // try removing skippable headers
            $savedata = $data;
            while ($this->isSkippableCurlHeader($data)) {
                $this->debug('Found HTTP header to skip');
                if (false !== ($pos = mb_strpos($data, "\r\n\r\n"))) {
                    $data = ltrim(mb_substr($data, $pos));
                } elseif (false !== ($pos = mb_strpos($data, "\n\n"))) {
                    $data = ltrim(mb_substr($data, $pos));
                }
            }

            if ('' === $data) {
                // have nothing left; just remove 100 header(s)
                $data = $savedata;
                while (preg_match('/^HTTP\/1.1 100/', $data)) {
                    if (false !== ($pos = mb_strpos($data, "\r\n\r\n"))) {
                        $data = ltrim(mb_substr($data, $pos));
                    } elseif (false !== ($pos = mb_strpos($data, "\n\n"))) {
                        $data = ltrim(mb_substr($data, $pos));
                    }
                }
            }

            // separate content from HTTP headers
            if (false !== ($pos = mb_strpos($data, "\r\n\r\n"))) {
                $lb = "\r\n";
            } elseif (false !== ($pos = mb_strpos($data, "\n\n"))) {
                $lb = "\n";
            } else {
                $this->debug('no proper separation of headers and document');
                $this->setError('no proper separation of headers and document');

                return false;
            }
            $header_data  = trim(mb_substr($data, 0, $pos));
            $header_array = explode($lb, $header_data);
            $data         = ltrim(mb_substr($data, $pos));
            $this->debug('found proper separation of headers and document');
            $this->debug('cleaned data, stringlen: ' . mb_strlen($data));
            // clean headers
            foreach ($header_array as $header_line) {
                $arr = explode(':', $header_line, 2);
                if (is_array($arr) && count($arr) > 1) {
                    $header_name                          = mb_strtolower(trim($arr[0]));
                    $this->incoming_headers[$header_name] = trim($arr[1]);
                    if ('set-cookie' === $header_name) {
                        // TODO: allow multiple cookies from parseCookie
                        $cookie = $this->parseCookie(trim($arr[1]));
                        if ($cookie) {
                            $this->incoming_cookies[] = $cookie;
                            $this->debug('found cookie: ' . $cookie['name'] . ' = ' . $cookie['value']);
                        } else {
                            $this->debug('did not find cookie in ' . trim($arr[1]));
                        }
                    }
                } elseif (isset($header_name)) {
                    // append continuation line to previous header
                    $this->incoming_headers[$header_name] .= $lb . ' ' . $header_line;
                }
            }
        }

        $this->response_status_line = $header_array[0];
        $arr                        = explode(' ', $this->response_status_line, 3);
        $http_version               = $arr[0];

The assignment to $http_version is dead and can be removed.

        $http_status                = (int)$arr[1];
        $http_reason                = count($arr) > 2 ? $arr[2] : '';
        // see if we need to resend the request with http digest authentication
        if (isset($this->incoming_headers['location']) && (301 === $http_status || 302 === $http_status)) {
            $this->debug("Got $http_status $http_reason with Location: " . $this->incoming_headers['location']);
            $this->setURL($this->incoming_headers['location']);
            $this->tryagain = true;

            return false;
        }

        // see if we need to resend the request with http digest authentication
        if (isset($this->incoming_headers['www-authenticate']) && 401 === $http_status) {
            $this->debug("Got 401 $http_reason with WWW-Authenticate: " . $this->incoming_headers['www-authenticate']);
            if (false !== mb_strpos($this->incoming_headers['www-authenticate'], 'Digest ')) {
                $this->debug('Server wants digest authentication');
                // remove "Digest " from our elements
                $digestString = str_replace('Digest ', '', $this->incoming_headers['www-authenticate']);
                // parse elements into array
                $digestElements = explode(',', $digestString);
                foreach ($digestElements as $val) {
                    $tempElement                    = explode('=', trim($val), 2);
                    $digestRequest[$tempElement[0]] = str_replace('"', '', $tempElement[1]);
                }

                // should have (at least) qop, realm, nonce
                if (isset($digestRequest['nonce'])) {
                    $this->setCredentials($this->username, $this->password, 'digest', $digestRequest);

The variable $digestRequest seems to be defined by a foreach iteration on line 3288. Are you sure the iterator is never empty, otherwise this variable is not defined?

                    $this->tryagain = true;

                    return false;
                }
            }
            $this->debug('HTTP authentication failed');
            $this->setError('HTTP authentication failed');

            return false;
        }

        if (($http_status >= 300 && $http_status <= 307) || ($http_status >= 400 && $http_status <= 417) || ($http_status >= 501 && $http_status <= 505)) {
            $this->setError("Unsupported HTTP response status $http_status $http_reason (soapclient->response has contents of the response)");

            return false;
        }

        // decode content-encoding
        if (isset($this->incoming_headers['content-encoding']) && '' !== $this->incoming_headers['content-encoding']) {
            if ('deflate' === mb_strtolower($this->incoming_headers['content-encoding']) || 'gzip' === mb_strtolower($this->incoming_headers['content-encoding'])) {
                // if decoding works, use it. else assume data wasn't gzencoded
                if (function_exists('gzinflate')) {
                    //$timer->setMarker('starting decoding of gzip/deflated content');
                    // IIS 5 requires gzinflate instead of gzuncompress (similar to IE 5 and gzdeflate v. gzcompress)
                    // this means there are no Zlib headers, although there should be
                    $this->debug('The gzinflate function exists');
                    $datalen = mb_strlen($data);

The variable $data does not seem to be defined for all execution paths leading up to this point.

                    if ('deflate' === $this->incoming_headers['content-encoding']) {
                        if (false !== ($degzdata = @gzinflate($data))) {
                            $data = $degzdata;
                            $this->debug('The payload has been inflated to ' . mb_strlen($data) . ' bytes');
                            if (mb_strlen($data) < $datalen) {
                                // test for the case that the payload has been compressed twice
                                $this->debug('The inflated payload is smaller than the gzipped one; try again');
                                if (false !== ($degzdata = @gzinflate($data))) {
                                    $data = $degzdata;
                                    $this->debug('The payload has been inflated again to ' . mb_strlen($data) . ' bytes');
                                }
                            }
                        } else {
                            $this->debug('Error using gzinflate to inflate the payload');
                            $this->setError('Error using gzinflate to inflate the payload');
                        }
                    } elseif ('gzip' === $this->incoming_headers['content-encoding']) {
                        if (false !== ($degzdata = @gzinflate(mb_substr($data, 10)))) {
                            // do our best
                            $data = $degzdata;
                            $this->debug('The payload has been un-gzipped to ' . mb_strlen($data) . ' bytes');
                            if (mb_strlen($data) < $datalen) {
                                // test for the case that the payload has been compressed twice
                                $this->debug('The un-gzipped payload is smaller than the gzipped one; try again');
                                if (false !== ($degzdata = @gzinflate(mb_substr($data, 10)))) {
                                    $data = $degzdata;
                                    $this->debug('The payload has been un-gzipped again to ' . mb_strlen($data) . ' bytes');
                                }
                            }
                        } else {
                            $this->debug('Error using gzinflate to un-gzip the payload');
                            $this->setError('Error using gzinflate to un-gzip the payload');
                        }
                    }
                    //$timer->setMarker('finished decoding of gzip/deflated content');
                    //print "<xmp>\nde-inflated:\n---------------\n$data\n-------------\n</xmp>";
                    // set decoded payload
                    $this->incoming_payload = $header_data . $lb . $lb . $data;

The variable $header_data does not seem to be defined for all execution paths leading up to this point.

                } else {
                    $this->debug('The server sent compressed data. Your php install must have the Zlib extension compiled in to support this.');
                    $this->setError('The server sent compressed data. Your php install must have the Zlib extension compiled in to support this.');
                }
            } else {
                $this->debug('Unsupported Content-Encoding ' . $this->incoming_headers['content-encoding']);
                $this->setError('Unsupported Content-Encoding ' . $this->incoming_headers['content-encoding']);
            }
        } else {
            $this->debug('No Content-Encoding header');
        }

        if ('' === $data) {
            $this->debug('no data after headers!');
            $this->setError('no data present after HTTP headers');

            return false;
        }

        return $data;
    }

    /**
     * Sets the content-type for the SOAP message to be sent
     *
     * @param    string $type    the content type, MIME style
     * @param    mixed  $charset character set used for encoding (or false)
     */
    public function setContentType($type, $charset = false)
    {
        $this->setHeader('Content-Type', $type . ($charset ? '; charset=' . $charset : ''));
    }

    /**
     * Specifies that an HTTP persistent connection should be used
     *
     * @return bool whether the request was honored by this method.
     */
    public function usePersistentConnection()
    {
        if (isset($this->outgoing_headers['Accept-Encoding'])) {
            return false;
        }
        $this->protocol_version     = '1.1';
        $this->persistentConnection = true;
        $this->setHeader('Connection', 'Keep-Alive');

        return true;
    }

    /**
     * Parse an incoming Cookie into it's parts
     *
     * @param    string $cookie_str content of cookie
     * @return    bool|array with data of that cookie
     */
    /*
     * TODO: allow a Set-Cookie string to be parsed into multiple cookies
     */
    private function parseCookie($cookie_str)
    {
        $cookie_str   = str_replace('; ', ';', $cookie_str) . ';';
        $data         = preg_split('/;/', $cookie_str);
        $value_str    = $data[0];
        $cookie_param = 'domain=';
        $start        = mb_strpos($cookie_str, $cookie_param);
        if ($start > 0) {
            $domain = mb_substr($cookie_str, $start + mb_strlen($cookie_param));
            $domain = mb_substr($domain, 0, mb_strpos($domain, ';'));
        } else {
            $domain = '';
        }

        $cookie_param = 'expires=';
        $start        = mb_strpos($cookie_str, $cookie_param);
        if ($start > 0) {
            $expires = mb_substr($cookie_str, $start + mb_strlen($cookie_param));
            $expires = mb_substr($expires, 0, mb_strpos($expires, ';'));
        } else {
            $expires = '';
        }

        $cookie_param = 'path=';
        $start        = mb_strpos($cookie_str, $cookie_param);
        if ($start > 0) {
            $path = mb_substr($cookie_str, $start + mb_strlen($cookie_param));
            $path = mb_substr($path, 0, mb_strpos($path, ';'));
        } else {
            $path = '/';
        }

        $cookie_param = ';secure;';
        $secure       = false;
        if (false !== mb_strpos($cookie_str, $cookie_param)) {
            $secure = true;
        }

        $sep_pos = mb_strpos($value_str, '=');
        if ($sep_pos) {
            $name   = mb_substr($value_str, 0, $sep_pos);
            $value  = mb_substr($value_str, $sep_pos + 1);
            $cookie = [
                'name'    => $name,
                'value'   => $value,
                'domain'  => $domain,
                'path'    => $path,
                'expires' => $expires,
                'secure'  => $secure,
            ];

            return $cookie;
        }

        return false;
    }

    /**
     * Sort out cookies for the current request
     *
     * @param    array|null $cookies array with all cookies
     * @param    bool       $secure  is the send-content secure or not?
     * @return    string for Cookie-HTTP-Header
     */
    private function getCookiesForRequest($cookies, $secure = false)
    {
        $cookie_str = '';
        if ((null !== $cookies) && is_array($cookies)) {
            foreach ($cookies as $cookie) {
                if (!is_array($cookie)) {
                    continue;
                }
                $this->debug('check cookie for validity: ' . $cookie['name'] . '=' . $cookie['value']);
                if (isset($cookie['expires']) && !empty($cookie['expires'])) {
                    if (strtotime($cookie['expires']) <= time()) {
                        $this->debug('cookie has expired');
                        continue;
                    }
                }
                if (isset($cookie['domain']) && !empty($cookie['domain'])) {
                    $domain = preg_quote($cookie['domain']);
                    if (!preg_match("'.*$domain$'i", $this->host)) {
                        $this->debug('cookie has different domain');
                        continue;
                    }
                }
                if (isset($cookie['path']) && !empty($cookie['path'])) {
                    $path = preg_quote($cookie['path']);
                    if (!preg_match("'^$path.*'i", $this->path)) {
                        $this->debug('cookie is for a different path');
                        continue;
                    }
                }
                if ((!$secure) && !empty($cookie['secure'])) {
                    $this->debug('cookie is secure, transport is not');
                    continue;
                }
                $cookie_str .= $cookie['name'] . '=' . $cookie['value'] . '; ';
                $this->debug('add cookie to Cookie-String: ' . $cookie['name'] . '=' . $cookie['value']);
            }
        }

        return $cookie_str;
    }
}

/**
 * Nusoap_server allows the user to create a SOAP server
 * that is capable of receiving messages and returning responses
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @author   Scott Nichol <snichol@users.sourceforge.net>
 */
class Nusoap_server extends Nusoap_base
{
    /**
     * HTTP headers of request
     *
     * @var array
     */
    private $headers = [];
    /**
     * HTTP request
     *
     * @var string
     */
    private $request = '';
    /**
     * SOAP headers from request (incomplete namespace resolution; special characters not escaped) (text)
     *
     * @var string
     */
    public $requestHeaders = '';
    /**
     * SOAP Headers from request (parsed)
     *
     * @var mixed
     */
    public $requestHeader;
    /**
     * SOAP body request portion (incomplete namespace resolution; special characters not escaped) (text)
     *
     * @var string
     */
    public $document = '';
    /**
     * SOAP payload for request (text)
     *
     * @var string
     */
    public $requestSOAP = '';
    /**
     * Requested method namespace URI
     *
     * @var string
     */
    private $methodURI = '';
    /**
     * Name of method requested
     *
     * @var string
     */
    private $methodname = '';
    /**
     * Method parameters from request
     *
     * @var array
     */
    private $methodparams = [];
    /**
     * SOAP Action from request
     *
     * @var string
     */
    private $SOAPAction = '';
    /**
     * Character set encoding of incoming (request) messages
     *
     * @var string
     */
    public $xml_encoding = '';
    /**
     * Toggles whether the parser decodes element content w/ utf8_decode()
     *
     * @var bool
     */
    public $decode_utf8 = true;
    /**
     * HTTP headers of response
     *
     * @var array
     */
    public $outgoing_headers = [];
    /**
     * HTTP response
     *
     * @var string
     */
    private $response = '';
    /**
     * SOAP headers for response (text or array of Soapval or associative array)
     *
     * @var mixed
     */
    public $responseHeaders = '';
    /**
     * SOAP payload for response (text)
     *
     * @var string
     */
    private $responseSOAP = '';
    /**
     * Method return value to place in response
     *
     * @var mixed
     */
    private $methodreturn = false;
    /**
     * Whether $methodreturn is a string of literal XML
     *
     * @var bool
     */
    public $methodreturnisliteralxml = false;
    /**
     * SOAP fault for response (or false)
     *
     * @var mixed
     */
    private $fault = false;
    /**
     * Text indication of result (for debugging)
     *
     * @var string
     */
    private $result = 'successful';
    /**
     * Assoc array of operations => opData; operations are added by the register()
     * method or by parsing an external WSDL definition
     *
     * @var array
     */
    private $operations = [];
    /**
     * Wsdl instance (if one)
     *
     * @var mixed
     */
    private $wsdl = false;
    /**
     * URL for WSDL (if one)
     *
     * @var mixed
     */
    private $externalWSDLURL = false;
    /**
     * Whether to append debug to response as XML comment
     *
     * @var bool
     */
    public $debug_flag = false;

    /**
     * Constructor
     * the optional parameter is a path to a WSDL file that you'd like to bind the server instance to.
     *
     * @param mixed $wsdl file path or URL (string), or Wsdl instance (object)
     */
    public function __construct($wsdl = false)
    {
        parent::__construct();
        // turn on debugging?
        global $debug;
        global $_SERVER;
        if (null !== $_SERVER) {
            $this->debug('_SERVER is defined:');
            $this->appendDebug($this->varDump($_SERVER));
        } else {
            $this->debug('_SERVER is not defined.');
        }

        if (isset($debug)) {
            $this->debug("In nusoap_server, set debug_flag=$debug based on global flag");
            $this->debug_flag = $debug;
        } elseif (isset($_SERVER['QUERY_STRING'])) {
            $qs = explode('&', $_SERVER['QUERY_STRING']);
            foreach ($qs as $v) {
                if (0 === mb_strpos($v, 'debug=')) {
                    $this->debug('In nusoap_server, set debug_flag=' . mb_substr($v, 6) . ' based on query string #1');
                    $this->debug_flag = mb_substr($v, 6);

The property $debug_flag was declared of type boolean, but mb_substr($v, 6) is of type string. Maybe add a type cast?

                }
            }
        }

        // Wsdl
        if ($wsdl) {
            $this->debug('In nusoap_server, WSDL is specified');
            if (is_object($wsdl) && ('Wsdl' === get_class($wsdl))) {
                $this->wsdl            = $wsdl;
                $this->externalWSDLURL = $this->wsdl->wsdl;
                $this->debug('Use existing Wsdl instance from ' . $this->externalWSDLURL);
            } else {
                $this->debug('Create Wsdl from ' . $wsdl);
                $this->wsdl = new Wsdl($wsdl);
                $this->externalWSDLURL = $wsdl;
            }
            $this->appendDebug($this->wsdl->getDebug());
            $this->wsdl->clearDebug();
            if (false !== ($err = $this->wsdl->getError())) {
                die('WSDL ERROR: ' . $err);

Using exit here is not recommended.

            }
        }
    }

    /**
     * Processes request and returns response
     *
     * @param    string $data usually is the value of $HTTP_RAW_POST_DATA
     */
    public function service($data)
    {
        global $_SERVER;
        if (isset($_SERVER['REQUEST_METHOD'])) {
            $rm = $_SERVER['REQUEST_METHOD'];
        } else {
            $rm = '';
        }

        if (isset($_SERVER['QUERY_STRING'])) {
            $qs = $_SERVER['QUERY_STRING'];
        } else {
            $qs = '';
        }
        $this->debug("In service, request method=$rm query string=$qs strlen(\$data)=" . mb_strlen($data));
        if ('POST' === $rm) {
            $this->debug('In service, invoke the request');
            $this->parse_request($data);
            if (!$this->fault) {
                $this->invoke_method();
            }
            if (!$this->fault) {
                $this->serialize_return();
            }
            $this->send_response();
        } elseif (preg_match('/wsdl/', $qs)) {
            $this->debug('In service, this is a request for WSDL');
            if ($this->externalWSDLURL) {
                if (false !== mb_strpos($this->externalWSDLURL, 'http://')) {
                    // assume URL
                    $this->debug('In service, re-direct for WSDL');
                    header('Location: ' . $this->externalWSDLURL);
                } else {
                    // assume file
                    $this->debug('In service, use file passthru for WSDL');
                    header("Content-Type: text/xml\r\n");
                    $pos = mb_strpos($this->externalWSDLURL, 'file://');
                    if (false === $pos) {
                        $filename = $this->externalWSDLURL;

The assignment to $filename is dead and can be removed.

                    } else {
                        $filename = mb_substr($this->externalWSDLURL, $pos + 7);
                    }
                    $fp = fopen($this->externalWSDLURL, 'rb');
                    fpassthru($fp);

It seems like $fp can also be of type false; however, parameter $handle of fpassthru() does only seem to accept resource, maybe add an additional type check?

                }
            } elseif ($this->wsdl) {
                $this->debug('In service, serialize WSDL');
                header("Content-Type: text/xml; charset=ISO-8859-1\r\n");
                print $this->wsdl->serialize($this->debug_flag);
                if ($this->debug_flag) {
                    $this->debug('Wsdl:');
                    $this->appendDebug($this->varDump($this->wsdl));
                    print $this->getDebugAsXMLComment();
                }
            } else {
                $this->debug('In service, there is no WSDL');
                header("Content-Type: text/html; charset=ISO-8859-1\r\n");
                print 'This service does not provide WSDL';
            }
        } elseif ($this->wsdl) {
            $this->debug('In service, return Web description');
            print $this->wsdl->webDescription();
        } else {
            $this->debug('In service, no Web description');
            header("Content-Type: text/html; charset=ISO-8859-1\r\n");
            print 'This service does not provide a Web description';
        }
    }

    /**
     * Parses HTTP request headers.
     *
     * The following fields are set by this function (when successful)
     *
     * headers
     * request
     * xml_encoding
     * SOAPAction
     */
    private function parse_http_headers()
    {
        global $_SERVER;
        $this->request    = '';
        $this->SOAPAction = '';
        if (function_exists('getallheaders')) {
            $this->debug('In parse_http_headers, use getallheaders');
            $headers = getallheaders();
            foreach ($headers as $k => $v) {
                $k                 = mb_strtolower($k);
                $this->headers[$k] = $v;
                $this->request     .= "$k: $v\r\n";
                $this->debug("$k: $v");
            }
            // get SOAPAction header
            if (isset($this->headers['soapaction'])) {
                $this->SOAPAction = str_replace('"', '', $this->headers['soapaction']);
            }
            // get the character encoding of the incoming request
            if (isset($this->headers['content-type']) && mb_strpos($this->headers['content-type'], '=')) {
                $enc                = str_replace('"', '', mb_substr(mb_strstr($this->headers['content-type'], '='), 1));
                $this->xml_encoding = 'US-ASCII';
                if (preg_match('/^(ISO-8859-1|US-ASCII|UTF-8)$/i', $enc)) {
                    $this->xml_encoding = mb_strtoupper($enc);
                }
            } else {
                // should be US-ASCII for HTTP 1.0 or ISO-8859-1 for HTTP 1.1
                $this->xml_encoding = 'ISO-8859-1';
            }
        } elseif (null !== $_SERVER && is_array($_SERVER)) {
            $this->debug('In parse_http_headers, use _SERVER');
            foreach ($_SERVER as $k => $v) {
                if (0 === mb_strpos($k, 'HTTP_')) {
                    $k = str_replace(' ', '-', mb_strtolower(str_replace('_', ' ', mb_substr($k, 5))));
                } else {
                    $k = str_replace(' ', '-', mb_strtolower(str_replace('_', ' ', $k)));
                }
                if ('soapaction' === $k) {
                    // get SOAPAction header
                    $k                = 'SOAPAction';
                    $v                = str_replace('"', '', $v);
                    $v                = str_replace('\\', '', $v);
                    $this->SOAPAction = $v;
                } elseif ('content-type' === $k) {
                    // get the character encoding of the incoming request
                    if (mb_strpos($v, '=')) {
                        $enc                = mb_substr(mb_strstr($v, '='), 1);
                        $enc                = str_replace('"', '', $enc);
                        $enc                = str_replace('\\', '', $enc);
                        $this->xml_encoding = 'US-ASCII';
                        if (preg_match('/^(ISO-8859-1|US-ASCII|UTF-8)$/i', $enc)) {
                            $this->xml_encoding = mb_strtoupper($enc);
                        }
                    } else {
                        // should be US-ASCII for HTTP 1.0 or ISO-8859-1 for HTTP 1.1
                        $this->xml_encoding = 'ISO-8859-1';
                    }
                }
                $this->headers[$k] = $v;
                $this->request     .= "$k: $v\r\n";
                $this->debug("$k: $v");
            }
        } else {
            $this->debug('In parse_http_headers, HTTP headers not accessible');
            $this->setError('HTTP headers not accessible');
        }
    }

    /**
     * Parses a request
     *
     * The following fields are set by this function (when successful)
     *
     * headers
     * request
     * xml_encoding
     * SOAPAction
     * request
     * requestSOAP
     * methodURI
     * methodname
     * methodparams
     * requestHeaders
     * document
     *
     * This sets the fault field on error
     *
     * @param    string $data XML string
     */
    private function parse_request($data = '')
    {
        $this->debug('entering parse_request()');
        $this->parse_http_headers();
        $this->debug('got character encoding: ' . $this->xml_encoding);
        // uncompress if necessary
        if (isset($this->headers['content-encoding']) && '' !== $this->headers['content-encoding']) {
            $this->debug('got content encoding: ' . $this->headers['content-encoding']);
            if ('deflate' === $this->headers['content-encoding'] || 'gzip' === $this->headers['content-encoding']) {
                // if decoding works, use it. else assume data wasn't gzencoded
                if (function_exists('gzuncompress')) {
                    if ('deflate' === $this->headers['content-encoding'] && $degzdata = @gzuncompress($data)) {
                        $data = $degzdata;
                    } elseif ('gzip' === $this->headers['content-encoding'] && $degzdata = gzinflate(mb_substr($data, 10))) {
                        $data = $degzdata;
                    } else {
                        $this->fault('SOAP-ENV:Client', 'Errors occurred when trying to decode the data');

                        return;
                    }
                } else {
                    $this->fault('SOAP-ENV:Client', 'This Server does not support compressed data');

                    return;
                }
            }
        }
        $this->request     .= "\r\n" . $data;
        $data              = $this->parseRequest($this->headers, $data);
        $this->requestSOAP = $data;

It seems like $data can also be of type false. However, the property $requestSOAP is declared as type string. Maybe add an additional type check?

        $this->debug('leaving parse_request');
    }

    /**
     * Invokes a PHP function for the requested SOAP method
     *
     * The following fields are set by this function (when successful)
     *
     * methodreturn
     *
     * Note that the PHP function that is called may also set the following
     * fields to affect the response sent to the client
     *
     * responseHeaders
     * outgoing_headers
     *
     * This sets the fault field on error
     */
    private function invoke_method()
    {
        $this->debug('in invoke_method, methodname=' . $this->methodname . ' methodURI=' . $this->methodURI . ' SOAPAction=' . $this->SOAPAction);
        //
        // if you are debugging in this area of the code, your service uses a class to implement methods,
        // you use SOAP RPC, and the client is .NET, please be aware of the following...
        // when the .NET wsdl.exe utility generates a proxy, it will remove the '.' or '..' from the
        // method name.  that is fine for naming the .NET methods.  it is not fine for properly constructing
        // the XML request and reading the XML response.  you need to add the RequestElementName and
        // ResponseElementName to the System.Web.Services.Protocols.SoapRpcMethodAttribute that wsdl.exe
        // generates for the method.  these parameters are used to specify the correct XML element names
        // for .NET to use, i.e. the names with the '.' in them.
        //
        $orig_methodname = $this->methodname;
        if ($this->wsdl) {
            if (false !== ($this->opData = $this->wsdl->getOperationData($this->methodname))) {

The property opData does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                $this->debug('in invoke_method, found WSDL operation=' . $this->methodname);
                $this->appendDebug('opData=' . $this->varDump($this->opData));
            } elseif (false !== ($this->opData = $this->wsdl->getOperationDataForSoapAction($this->SOAPAction))) {
                // Note: hopefully this case will only be used for doc/lit, since rpc services should have wrapper element
                $this->debug('in invoke_method, found WSDL soapAction=' . $this->SOAPAction . ' for operation=' . $this->opData['name']);
                $this->appendDebug('opData=' . $this->varDump($this->opData));
                $this->methodname = $this->opData['name'];
            } else {
                $this->debug('in invoke_method, no WSDL for operation=' . $this->methodname);
                $this->fault('SOAP-ENV:Client', "Operation '" . $this->methodname . "' is not defined in the WSDL for this service");

                return;
            }
        } else {
            $this->debug('in invoke_method, no WSDL to validate method');
        }

        // if a . is present in $this->methodname, we see if there is a class in scope,
        // which could be referred to. We will also distinguish between two deliminators,
        // to allow methods to be called a the class or an instance
        $delim = '';
        if (mb_strpos($this->methodname, '..') > 0) {
            $delim = '..';
        } elseif (mb_strpos($this->methodname, '.') > 0) {
            $delim = '.';
        }
        $this->debug("in invoke_method, delim=$delim");
        $class  = '';
        $method = '';
        if (mb_strlen($delim) > 0 && 1 === mb_substr_count($this->methodname, $delim)) {
            $try_class = mb_substr($this->methodname, 0, mb_strpos($this->methodname, $delim));
            if (class_exists($try_class)) {
                // get the class and method name
                $class  = $try_class;
                $method = mb_substr($this->methodname, mb_strpos($this->methodname, $delim) + mb_strlen($delim));
                $this->debug("in invoke_method, class=$class method=$method delim=$delim");
            } else {
                $this->debug("in invoke_method, class=$try_class not found");
            }
        } elseif (mb_strlen($delim) > 0 && mb_substr_count($this->methodname, $delim) > 1) {
            $split  = explode($delim, $this->methodname);
            $method = array_pop($split);
            $class  = implode('\\', $split);
        } else {
            $try_class = '';
            $this->debug('in invoke_method, no class to try');
        }

        // does method exist?
        if ('' === $class) {
            if (!function_exists($this->methodname)) {
                $this->debug("in invoke_method, function '$this->methodname' not found!");
                $this->result = 'fault: method not found';
                $this->fault('SOAP-ENV:Client', "method '$this->methodname'('$orig_methodname') not defined in service('$try_class' '$delim')");

The variable $try_class does not seem to be defined for all execution paths leading up to this point.

                return;
            }
        } else {
            $method_to_compare = (0 === mb_strpos(PHP_VERSION, '4.')) ? mb_strtolower($method) : $method;
            if (!in_array($method_to_compare, get_class_methods($class), true)) {
                $this->debug("in invoke_method, method '$this->methodname' not found in class '$class'!");
                $this->result = 'fault: method not found';
                $this->fault('SOAP-ENV:Client', "method '$this->methodname'/'$method_to_compare'('$orig_methodname') not defined in service/'$class'('$try_class' '$delim')");

                return;
            }
        }

        // evaluate message, getting back parameters
        // verify that request parameters match the method's signature
        if (!$this->verify_method($this->methodname, $this->methodparams)) {
            // debug
            $this->debug('ERROR: request not verified against method signature');
            $this->result = 'fault: request failed validation against method signature';
            // return fault
            $this->fault('SOAP-ENV:Client', "Operation '$this->methodname' not defined in service.");

            return;
        }

        // if there are parameters to pass
        $this->debug('in invoke_method, params:');
        $this->appendDebug($this->varDump($this->methodparams));
        $this->debug("in invoke_method, calling '$this->methodname'");
        if (!function_exists('call_user_func_array')) {
            if ('' === $class) {
                $this->debug('in invoke_method, calling function using eval()');
                $funcCall = "\$this->methodreturn = $this->methodname(";
            } else {
                if ('..' === $delim) {
                    $this->debug('in invoke_method, calling class method using eval()');
                    $funcCall = '$this->methodreturn = ' . $class . '::' . $method . '(';
                } else {
                    $this->debug('in invoke_method, calling instance method using eval()');
                    // generate unique instance name
                    $instname = '$inst_' . time();
                    $funcCall = $instname . ' = new ' . $class . '(); ';
                    $funcCall .= '$this->methodreturn = ' . $instname . '->' . $method . '(';
                }
            }
            if ($this->methodparams) {

The expression $this->methodparams of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.

                foreach ($this->methodparams as $param) {
                    if (is_array($param) || is_object($param)) {
                        $this->fault('SOAP-ENV:Client', 'NuSOAP does not handle complexType parameters correctly when using eval; call_user_func_array must be available');

                        return;
                    }
                    $funcCall .= "\"$param\",";
                }
                $funcCall = mb_substr($funcCall, 0, -1);
            }
            $funcCall .= ');';
            $this->debug('in invoke_method, function call: ' . $funcCall);
            @eval($funcCall);

The use of eval() is discouraged.

        } else {
            if ('' === $class) {
                $this->debug('in invoke_method, calling function using call_user_func_array()');
                $call_arg = $this->methodname;
            // straight assignment changes $this->methodname to lower case after call_user_func_array()
            } elseif ('..' === $delim) {
                $this->debug('in invoke_method, calling class method using call_user_func_array()');
                $call_arg = [$class, $method];
            } else {
                $this->debug('in invoke_method, calling instance method using call_user_func_array()');
                $instance = new $class();
                $call_arg = [&$instance, $method];
            }
            if (is_array($this->methodparams) && count($this->methodparams) > 0) {
                $this->methodreturn = call_user_func_array($call_arg, array_values($this->methodparams));
            } else {
                $this->methodreturn = call_user_func_array($call_arg, []);
            }
        }
        $this->debug('in invoke_method, methodreturn:');
        $this->appendDebug($this->varDump($this->methodreturn));
        $this->debug("in invoke_method, called method $this->methodname, received data of type " . gettype($this->methodreturn));
    }

    /**
     * Serializes the return value from a PHP function into a full SOAP Envelope
     *
     * The following fields are set by this function (when successful)
     *
     * responseSOAP
     *
     * This sets the fault field on error
     */
    private function serialize_return()
    {
        $this->debug('Entering serialize_return methodname: ' . $this->methodname . ' methodURI: ' . $this->methodURI);
        // if fault
        if (isset($this->methodreturn) && is_object($this->methodreturn) && (('soap_fault' === get_class($this->methodreturn)) || ('Nusoap_fault' === get_class($this->methodreturn)))) {
            $this->debug('got a fault object from method');
            $this->fault = $this->methodreturn;

            return;
        }

        if ($this->methodreturnisliteralxml) {
            $return_val = $this->methodreturn;
        // returned value(s)
        } else {
            $this->debug('got a(n) ' . gettype($this->methodreturn) . ' from method');
            $this->debug('serializing return value');
            if ($this->wsdl) {
                if (is_array($this->opData['output']['parts']) && count($this->opData['output']['parts']) > 1) {
                    $this->debug('more than one output part, so use the method return unchanged');
                    $opParams = $this->methodreturn;
                } elseif (1 === count($this->opData['output']['parts'])) {
                    $this->debug('exactly one output part, so wrap the method return in a simple array');
                    // TODO: verify that it is not already wrapped!
                    //foreach ($this->opData['output']['parts'] as $name => $type) {
                    //	$this->debug('wrap in element named ' . $name);
                    //}
                    $opParams = [$this->methodreturn];
                }
                $return_val = $this->wsdl->serializeRPCParameters($this->methodname, 'output', $opParams);

The variable $opParams does not seem to be defined for all execution paths leading up to this point.

                $this->appendDebug($this->wsdl->getDebug());
                $this->wsdl->clearDebug();
                if (false !== ($errstr = $this->wsdl->getError())) {
                    $this->debug('got Wsdl error: ' . $errstr);
                    $this->fault('SOAP-ENV:Server', 'unable to serialize result');

                    return;
                }
            } else {
                if (isset($this->methodreturn)) {
                    $return_val = $this->serialize_val($this->methodreturn, 'return');
                } else {
                    $return_val = '';
                    $this->debug('in absence of WSDL, assume void return for backward compatibility');
                }
            }
        }
        $this->debug('return value:');
        $this->appendDebug($this->varDump($return_val));
        $this->debug('serializing response');
        if ($this->wsdl) {
            $this->debug('have WSDL for serialization: style is ' . $this->opData['style']);
            if ('rpc' === $this->opData['style']) {
                $this->debug('style is rpc for serialization: use is ' . $this->opData['output']['use']);
                if ('literal' === $this->opData['output']['use']) {
                    // http://www.ws-i.org/Profiles/BasicProfile-1.1-2004-08-24.html R2735 says rpc/literal accessor elements should not be in a namespace
                    if ($this->methodURI) {
                        $payload = '<ns1:' . $this->methodname . 'Response xmlns:ns1="' . $this->methodURI . '">' . $return_val . '</ns1:' . $this->methodname . 'Response>';
                    } else {
                        $payload = '<' . $this->methodname . 'Response>' . $return_val . '</' . $this->methodname . 'Response>';
                    }
                } else {
                    if ($this->methodURI) {
                        $payload = '<ns1:' . $this->methodname . 'Response xmlns:ns1="' . $this->methodURI . '">' . $return_val . '</ns1:' . $this->methodname . 'Response>';
                    } else {
                        $payload = '<' . $this->methodname . 'Response>' . $return_val . '</' . $this->methodname . 'Response>';
                    }
                }
            } else {
                $this->debug('style is not rpc for serialization: assume document');
                $payload = $return_val;
            }
        } else {
            $this->debug('do not have WSDL for serialization: assume rpc/encoded');
            $payload = '<ns1:' . $this->methodname . 'Response xmlns:ns1="' . $this->methodURI . '">' . $return_val . '</ns1:' . $this->methodname . 'Response>';
        }
        $this->result = 'successful';
        if ($this->wsdl) {
            //if($this->debug_flag){
            $this->appendDebug($this->wsdl->getDebug());
            //	}
            $encodingStyle = '';
            if (isset($this->opData['output']['encodingStyle'])) {
                $encodingStyle = $this->opData['output']['encodingStyle'];
            }
            // Added: In case we use a WSDL, return a serialized env. WITH the usedNamespaces.
            $this->responseSOAP = $this->serializeEnvelope($payload, $this->responseHeaders, $this->wsdl->usedNamespaces, $this->opData['style'], $this->opData['output']['use'], $encodingStyle);
        } else {
            $this->responseSOAP = $this->serializeEnvelope($payload, $this->responseHeaders);
        }
        $this->debug('Leaving serialize_return');
    }

    /**
     * Sends an HTTP response
     *
     * The following fields are set by this function (when successful)
     *
     * outgoing_headers
     * response
     */
    private function send_response()
    {
        $this->debug('Enter send_response');
        if ($this->fault) {
            $payload                  = $this->fault->serialize();
            $this->outgoing_headers[] = 'HTTP/1.0 500 Internal Server Error';
            $this->outgoing_headers[] = 'Status: 500 Internal Server Error';
        } else {
            $payload = $this->responseSOAP;
            // Some combinations of PHP+Web server allow the Status
            // to come through as a header.  Since OK is the default
            // just do nothing.
            // $this->outgoing_headers[] = "HTTP/1.0 200 OK";
            // $this->outgoing_headers[] = "Status: 200 OK";
        }
        // add debug data if in debug mode
        if (!empty($this->debug_flag)) {
            $payload .= $this->getDebugAsXMLComment();
        }
        $this->outgoing_headers[] = "Server: $this->title Server v$this->version";
        preg_match('/\$Revisio' . 'n: ([^ ]+)/', $this->revision, $rev);
        $this->outgoing_headers[] = "X-SOAP-Server: $this->title/$this->version (" . $rev[1] . ')';
        // Let the Web server decide about this
        //$this->outgoing_headers[] = "Connection: Close\r\n";
        $payload                  = $this->getHTTPBody($payload);
        $type                     = $this->getHTTPContentType();
        $charset                  = $this->getHTTPContentTypeCharset();
        $this->outgoing_headers[] = "Content-Type: $type" . ($charset ? '; charset=' . $charset : '');
        //begin code to compress payload - by John
        // NOTE: there is no way to know whether the Web server will also compress
        // this data.
        if (mb_strlen($payload) > 1024 && isset($this->headers) && isset($this->headers['accept-encoding'])) {
            if (false !== mb_strpos($this->headers['accept-encoding'], 'gzip')) {
                if (function_exists('gzencode')) {
                    if (!empty($this->debug_flag)) {
                        $payload .= '<!-- Content being gzipped -->';
                    }
                    $this->outgoing_headers[] = 'Content-Encoding: gzip';
                    $payload                  = gzencode($payload);
                } else {
                    if (!empty($this->debug_flag)) {
                        $payload .= '<!-- Content will not be gzipped: no gzencode -->';
                    }
                }
            } elseif (false !== mb_strpos($this->headers['accept-encoding'], 'deflate')) {
                // Note: MSIE requires gzdeflate output (no Zlib header and checksum),
                // instead of gzcompress output,
                // which conflicts with HTTP 1.1 spec (http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.5)
                if (function_exists('gzdeflate')) {
                    if (!empty($this->debug_flag)) {
                        $payload .= '<!-- Content being deflated -->';
                    }
                    $this->outgoing_headers[] = 'Content-Encoding: deflate';
                    $payload                  = gzdeflate($payload);
                } else {
                    if (!empty($this->debug_flag)) {
                        $payload .= '<!-- Content will not be deflated: no gzcompress -->';
                    }
                }
            }
        }
        //end code
        $this->outgoing_headers[] = 'Content-Length: ' . mb_strlen($payload);
        reset($this->outgoing_headers);
        foreach ($this->outgoing_headers as $hdr) {
            header($hdr, false);
        }
        print $payload;
        $this->response = implode("\r\n", $this->outgoing_headers) . "\r\n\r\n" . $payload;
    }

    /**
     * Takes the value that was created by parsing the request
     * and compares to the method's signature, if available.
     *
     * @param    string $operation The operation to be invoked
     * @param    array  $request   The array of parameter values
     * @return bool    Whether the operation was found
     */
    private function verify_method($operation, $request)

The parameter $request is not used and could be removed.

    {
        if (isset($this->wsdl) && is_object($this->wsdl)) {
            if ($this->wsdl->getOperationData($operation)) {
                return true;
            }
        } elseif (isset($this->operations[$operation])) {
            return true;
        }

        return false;
    }

    /**
     * Processes SOAP message received from client
     *
     * @param    array  $headers The HTTP headers
     * @param    string $data    unprocessed request data from client
     * @return    mixed    value of the message, decoded into a PHP type
     */
    private function parseRequest($headers, $data)
    {
        $this->debug('Entering parseRequest() for data of length ' . mb_strlen($data) . ' headers:');
        $this->appendDebug($this->varDump($headers));
        if (!isset($headers['content-type'])) {
            $this->setError('Request not of type text/xml (no content-type header)');

            return false;
        }
        if (false === mb_strpos($headers['content-type'], 'text/xml')) {
            $this->setError('Request not of type text/xml');

            return false;
        }
        if (mb_strpos($headers['content-type'], '=')) {
            $enc = str_replace('"', '', mb_substr(mb_strstr($headers['content-type'], '='), 1));
            $this->debug('Got response encoding: ' . $enc);
            $this->xml_encoding = 'US-ASCII';
            if (preg_match('/^(ISO-8859-1|US-ASCII|UTF-8)$/i', $enc)) {
                $this->xml_encoding = mb_strtoupper($enc);
            }
        } else {
            // should be US-ASCII for HTTP 1.0 or ISO-8859-1 for HTTP 1.1
            $this->xml_encoding = 'ISO-8859-1';
        }
        $this->debug('Use encoding: ' . $this->xml_encoding . ' when creating nusoap_parser');
        // parse response, get soap parser obj
        $parser = new Nusoap_parser($data, $this->xml_encoding, '', $this->decode_utf8);
        // parser debug
        $this->debug("parser debug: \n" . $parser->getDebug());
        // if fault occurred during message parsing
        if (false !== ($err = $parser->getError())) {
            $this->result = 'fault: error in msg parsing: ' . $err;
            $this->fault('SOAP-ENV:Client', "error in msg parsing:\n" . $err);
        // else successfully parsed request into Soapval object
        } else {
            // get/set methodname
            $this->methodURI  = $parser->root_struct_namespace;
            $this->methodname = $parser->root_struct_name;
            $this->debug('methodname: ' . $this->methodname . ' methodURI: ' . $this->methodURI);
            $this->debug('calling parser->get_soapbody()');
            $this->methodparams = $parser->get_soapbody();
            // get SOAP headers
            $this->requestHeaders = $parser->getHeaders();
            // get SOAP Header
            $this->requestHeader = $parser->get_soapheader();
            // add document for doclit support
            $this->document = $parser->document;
        }
    }

    /**
     * Gets the HTTP body for the current response.
     *
     * @param string $soapmsg The SOAP payload
     * @return string The HTTP body, which includes the SOAP payload
     */
    private function getHTTPBody($soapmsg)
    {
        return $soapmsg;
    }

    /**
     * Gets the HTTP content type for the current response.
     *
     * Note: getHTTPBody must be called before this.
     *
     * @return string the HTTP content type for the current response.
     */
    private function getHTTPContentType()
    {
        return 'text/xml';
    }

    /**
     * Gets the HTTP content type charset for the current response.
     * Returns false for non-text content types.
     *
     * Note: getHTTPBody must be called before this.
     *
     * @return string the HTTP content type charset for the current response.
     */
    private function getHTTPContentTypeCharset()
    {
        return $this->soap_defencoding;
    }

    /**
     * Add a method to the dispatch map (this has been replaced by the register method)
     *
     * @param    string $methodname
     * @param    string $in  array of input values
     * @param    string $out array of output values
     * @deprecated
     */
    public function add_to_map($methodname, $in, $out)
    {
        $this->operations[$methodname] = ['name' => $methodname, 'in' => $in, 'out' => $out];
    }

    /**
     * Register a service function with the server
     *
     * @param    string $name          the name of the PHP function, class.method or class..method
     * @param    array  $in            assoc array of input values: key = param name, value = param type
     * @param    array  $out           assoc array of output values: key = param name, value = param type
     * @param    mixed  $namespace     the element namespace for the method or false
     * @param    mixed  $soapaction    the soapaction for the method or false
     * @param    mixed  $style         optional (rpc|document) or false Note: when 'document' is specified, parameter and return wrappers are created for you automatically
     * @param    mixed  $use           optional (encoded|literal) or false
     * @param    string $documentation optional Description to include in WSDL
     * @param    string $encodingStyle optional (usually 'http://schemas.xmlsoap.org/soap/encoding/' for encoded)
     * @return bool
     */
    public function register($name, $in = [], $out = [], $namespace = false, $soapaction = false, $style = false, $use = false, $documentation = '', $encodingStyle = '')
    {
        global $_SERVER;
        if ($this->externalWSDLURL) {
            die('You cannot bind to an external WSDL file, and register methods outside of it! Please choose either WSDL or no WSDL.');

Using exit here is not recommended.

        }
        if (!$name) {
            die('You must specify a name when you register an operation');

Using exit here is not recommended.

        }
        if (!is_array($in)) {

The condition is_array($in) is always true.

            die('You must provide an array for operation inputs');

Using exit here is not recommended.

        }
        if (!is_array($out)) {

The condition is_array($out) is always true.

            die('You must provide an array for operation outputs');

Using exit here is not recommended.

        }
        if (false === $namespace) {
        }
        if (false === $soapaction) {
            if (null !== $_SERVER) {
                $SERVER_NAME = $_SERVER['SERVER_NAME'];
                $SCRIPT_NAME = isset($_SERVER['PHP_SELF']) ? $_SERVER['PHP_SELF'] : $_SERVER['SCRIPT_NAME'];
                $HTTPS = isset($_SERVER['HTTPS']) ? : 'off';
            } else {
                $this->setError(' _SERVER  is not available');
            }
            $SCHEME = 'http';
            if ('1' === $HTTPS || 'on' === $HTTPS) {

The variable $HTTPS does not seem to be defined for all execution paths leading up to this point.

                $SCHEME = 'https';
            }
            $soapaction = "$SCHEME://$SERVER_NAME$SCRIPT_NAME/$name";

The variable $SERVER_NAME does not seem to be defined for all execution paths leading up to this point.

The variable $SCRIPT_NAME does not seem to be defined for all execution paths leading up to this point.

        }
        if (false === $style) {
            $style = 'rpc';
        }
        if (false === $use) {
            $use = 'encoded';
        }
        if ('encoded' === $use && '' === $encodingStyle) {
            $encodingStyle = 'http://schemas.xmlsoap.org/soap/encoding/';
        }

        $this->operations[$name] = [
            'name'       => $name,
            'in'         => $in,
            'out'        => $out,
            'namespace'  => $namespace,
            'soapaction' => $soapaction,
            'style'      => $style,
        ];
        if ($this->wsdl) {
            $this->wsdl->addOperation($name, $in, $out, $namespace, $soapaction, $style, $use, $documentation, $encodingStyle);
        }

        return true;
    }

    /**
     * Specify a fault to be returned to the client.
     * This also acts as a flag to the server that a fault has occured.
     *
     * @param    string $faultcode
     * @param    string $faultstring
     * @param    string $faultactor
     * @param    string $faultdetail
     */
    public function fault($faultcode, $faultstring, $faultactor = '', $faultdetail = '')
    {
        if ('' === $faultdetail && $this->debug_flag) {
            $faultdetail = $this->getDebug();
        }
        $this->fault                   = new Nusoap_fault($faultcode, $faultactor, $faultstring, $faultdetail);
        $this->fault->soap_defencoding = $this->soap_defencoding;
    }

    /**
     * Sets up Wsdl object.
     * Acts as a flag to enable internal WSDL generation
     *
     * @param string $serviceName           , name of the service
     * @param mixed  $namespace             optional 'tns' service namespace or false
     * @param mixed  $endpoint              optional URL of service endpoint or false
     * @param string $style                 optional (rpc|document) WSDL style (also specified by operation)
     * @param string $transport             optional SOAP transport
     * @param mixed  $schemaTargetNamespace optional 'types' targetNamespace for service schema or false
     */
    public function configureWSDL($serviceName, $namespace = false, $endpoint = false, $style = 'rpc', $transport = 'http://schemas.xmlsoap.org/soap/http', $schemaTargetNamespace = false)
    {
        global $_SERVER;

        if (null !== $_SERVER) {
            $SERVER_NAME = $_SERVER['SERVER_NAME'];
            $SERVER_PORT = $_SERVER['SERVER_PORT'];
            $SCRIPT_NAME = isset($_SERVER['PHP_SELF']) ? $_SERVER['PHP_SELF'] : $_SERVER['SCRIPT_NAME'];
            $HTTPS = isset($_SERVER['HTTPS']) ?: 'off';
        } else {
            $this->setError(' $_SERVER is not available');
        }
        // If server name has port number attached then strip it (else port number gets duplicated in WSDL output) (occurred using lighttpd and FastCGI)
        $colon = mb_strpos($SERVER_NAME, ':');

The variable $SERVER_NAME does not seem to be defined for all execution paths leading up to this point.

        if ($colon) {
            $SERVER_NAME = mb_substr($SERVER_NAME, 0, $colon);
        }
        if (80 === $SERVER_PORT) {

The variable $SERVER_PORT does not seem to be defined for all execution paths leading up to this point.

            $SERVER_PORT = '';
        } else {
            $SERVER_PORT = ':' . $SERVER_PORT;
        }
        if (false === $namespace) {
            $namespace = "http://$SERVER_NAME/soap/$serviceName";
        }

        if (false === $endpoint) {
            $SCHEME = 'http';
            if ('1' === $HTTPS || 'on' === $HTTPS) {

The variable $HTTPS does not seem to be defined for all execution paths leading up to this point.

                $SCHEME = 'https';
            }
            $endpoint = "$SCHEME://$SERVER_NAME$SERVER_PORT$SCRIPT_NAME";

The variable $SCRIPT_NAME does not seem to be defined for all execution paths leading up to this point.

        }

        if (false === $schemaTargetNamespace) {
            $schemaTargetNamespace = $namespace;
        }

        $this->wsdl = new Wsdl();
        $this->wsdl->serviceName        = $serviceName;

The property serviceName does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

        $this->wsdl->endpoint           = $endpoint;
        $this->wsdl->namespaces['tns']  = $namespace;
        $this->wsdl->namespaces['soap'] = 'http://schemas.xmlsoap.org/wsdl/soap/';
        $this->wsdl->namespaces['Wsdl'] = 'http://schemas.xmlsoap.org/wsdl/';
        if ($schemaTargetNamespace !== $namespace) {
            $this->wsdl->namespaces['types'] = $schemaTargetNamespace;
        }
        $this->wsdl->schemas[$schemaTargetNamespace][0] = new Nusoap_xmlschema('', '', $this->wsdl->namespaces);
        if ('document' === $style) {
            $this->wsdl->schemas[$schemaTargetNamespace][0]->schemaInfo['elementFormDefault'] = 'qualified';
        }
        $this->wsdl->schemas[$schemaTargetNamespace][0]->schemaTargetNamespace                                   = $schemaTargetNamespace;
        $this->wsdl->schemas[$schemaTargetNamespace][0]->imports['http://schemas.xmlsoap.org/soap/encoding/'][0] = ['location' => '', 'loaded' => true];
        $this->wsdl->schemas[$schemaTargetNamespace][0]->imports['http://schemas.xmlsoap.org/wsdl/'][0]          = ['location' => '', 'loaded' => true];
        $this->wsdl->bindings[$serviceName . 'Binding']                                                          = [
            'name'      => $serviceName . 'Binding',
            'style'     => $style,
            'transport' => $transport,
            'portType'  => $serviceName . 'PortType',
        ];
        $this->wsdl->ports[$serviceName . 'Port']                                                                = [
            'binding'     => $serviceName . 'Binding',
            'location'    => $endpoint,
            'bindingType' => 'http://schemas.xmlsoap.org/wsdl/soap/',
        ];
    }
}

/**
 * Backward compatibility
 */
class Soap_server extends Nusoap_server
{
}

/**
 * Parses a WSDL file, allows access to it's data, other utility methods.
 * also builds WSDL structures programmatically.
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @author   Scott Nichol <snichol@users.sourceforge.net>
 */
class Wsdl extends Nusoap_base
{
    // URL or filename of the root of this WSDL
    public $wsdl;
    // define internal arrays of bindings, ports, operations, messages, etc.
    public $schemas       = [];
    public $currentSchema;
    public $message       = [];
    public $complexTypes  = [];
    public $messages      = [];
    public $currentMessage;
    public $currentOperation;
    public $portTypes     = [];
    public $currentPortType;
    public $bindings      = [];
    public $currentBinding;
    public $ports         = [];
    public $currentPort;
    public $opData        = [];
    public $status        = '';
    public $documentation = false;
    public $endpoint      = '';
    // array of Wsdl docs to import
    public $import = [];
    // parser vars
    public $parser;
    public $position    = 0;
    public $depth       = 0;
    public $depth_array = [];
    // for getting Wsdl
    public $proxyhost        = '';
    public $proxyport        = '';
    public $proxyusername    = '';
    public $proxypassword    = '';
    public $timeout          = 0;
    public $response_timeout = 30;
    public $curl_options     = [];    // User-specified cURL options
    public $use_curl         = false;            // whether to always try to use cURL
    // for HTTP authentication
    public $username    = '';                // Username for HTTP authentication
    public $password    = '';                // Password for HTTP authentication
    public $authtype    = '';                // Type of HTTP authentication
    public $certRequest = [];        // Certificate for HTTP SSL authentication

    /**
     * Constructor
     *
     * @param string      $wsdl             WSDL document URL
     * @param bool|string $proxyhost
     * @param bool|string $proxyport
     * @param bool|string $proxyusername
     * @param bool|string $proxypassword
     * @param int         $timeout          set the connection timeout
     * @param int         $response_timeout set the response timeout
     * @param array       $curl_options     user-specified cURL options
     * @param bool        $use_curl         try to use cURL
     */
    public function __construct($wsdl = '', $proxyhost = false, $proxyport = false, $proxyusername = false, $proxypassword = false, $timeout = 0, $response_timeout = 30, $curl_options = null, $use_curl = false)
    {
        parent::__construct();
        $this->debug("ctor Wsdl=$wsdl timeout=$timeout response_timeout=$response_timeout");
        $this->proxyhost        = $proxyhost;
        $this->proxyport        = $proxyport;
        $this->proxyusername    = $proxyusername;
        $this->proxypassword    = $proxypassword;
        $this->timeout          = $timeout;
        $this->response_timeout = $response_timeout;
        if (is_array($curl_options)) {
            $this->curl_options = $curl_options;
        }
        $this->use_curl = $use_curl;
        $this->fetchWSDL($wsdl);
    }

    /**
     * Fetches the WSDL document and parses it
     *
     * @param $wsdl
     */
    public function fetchWSDL($wsdl)
    {
        $this->debug("parse and process WSDL path=$wsdl");
        $this->wsdl = $wsdl;
        // parse Wsdl file
        if ('' !== $this->wsdl) {
            $this->parseWSDL($this->wsdl);
        }
        // imports
        // TODO: handle imports more properly, grabbing them in-line and nesting them
        $imported_urls = [];
        $imported      = 1;
        while ($imported > 0) {
            $imported = 0;
            // Schema imports
            foreach ($this->schemas as $ns => $list) {
                foreach ($list as $xs) {
                    $wsdlparts = parse_url($this->wsdl);    // this is bogusly simple!
                    foreach ($xs->imports as $ns2 => $list2) {
                        for ($ii = 0, $iiMax = count($list2); $ii < $iiMax; ++$ii) {
                            if (!$list2[$ii]['loaded']) {
                                $this->schemas[$ns][$ns2]->imports[$ns2][$ii]['loaded'] = true;
                                $url                                                    = $list2[$ii]['location'];
                                if ('' !== $url) {
                                    $urlparts = parse_url($url);
                                    if (!isset($urlparts['host'])) {
                                        $url = $wsdlparts['scheme'] . '://' . $wsdlparts['host'] . (isset($wsdlparts['port']) ? ':' . $wsdlparts['port'] : '') . mb_substr($wsdlparts['path'], 0, mb_strrpos($wsdlparts['path'], '/') + 1) . $urlparts['path'];
                                    }
                                    if (!in_array($url, $imported_urls, true)) {
                                        $this->parseWSDL($url);
                                        ++$imported;
                                        $imported_urls[] = $url;
                                    }
                                } else {
                                    $this->debug('Unexpected scenario: empty URL for unloaded import');
                                }
                            }
                        }
                    }
                }
            }
            // WSDL imports
            $wsdlparts = parse_url($this->wsdl);    // this is bogusly simple!
            foreach ($this->import as $ns => $list) {
                for ($ii = 0, $iiMax = count($list); $ii < $iiMax; ++$ii) {
                    if (!$list[$ii]['loaded']) {
                        $this->import[$ns][$ii]['loaded'] = true;
                        $url                              = $list[$ii]['location'];
                        if ('' !== $url) {
                            $urlparts = parse_url($url);
                            if (!isset($urlparts['host'])) {
                                $url = $wsdlparts['scheme'] . '://' . $wsdlparts['host'] . (isset($wsdlparts['port']) ? ':' . $wsdlparts['port'] : '') . mb_substr($wsdlparts['path'], 0, mb_strrpos($wsdlparts['path'], '/') + 1) . $urlparts['path'];
                            }
                            if (!in_array($url, $imported_urls, true)) {
                                $this->parseWSDL($url);
                                ++$imported;
                                $imported_urls[] = $url;
                            }
                        } else {
                            $this->debug('Unexpected scenario: empty URL for unloaded import');
                        }
                    }
                }
            }
        }
        // add new data to operation data
        foreach ($this->bindings as $binding => $bindingData) {
            if (isset($bindingData['operations']) && is_array($bindingData['operations'])) {
                foreach ($bindingData['operations'] as $operation => $data) {
                    $this->debug('post-parse data gathering for ' . $operation);
                    $this->bindings[$binding]['operations'][$operation]['input']  = isset($this->bindings[$binding]['operations'][$operation]['input']) ? array_merge($this->bindings[$binding]['operations'][$operation]['input'], $this->portTypes[$bindingData['portType']][$operation]['input']) : $this->portTypes[$bindingData['portType']][$operation]['input'];
                    $this->bindings[$binding]['operations'][$operation]['output'] = isset($this->bindings[$binding]['operations'][$operation]['output']) ? array_merge($this->bindings[$binding]['operations'][$operation]['output'], $this->portTypes[$bindingData['portType']][$operation]['output']) : $this->portTypes[$bindingData['portType']][$operation]['output'];
                    if (isset($this->messages[$this->bindings[$binding]['operations'][$operation]['input']['message']])) {
                        $this->bindings[$binding]['operations'][$operation]['input']['parts'] = $this->messages[$this->bindings[$binding]['operations'][$operation]['input']['message']];
                    }
                    if (isset($this->messages[$this->bindings[$binding]['operations'][$operation]['output']['message']])) {
                        $this->bindings[$binding]['operations'][$operation]['output']['parts'] = $this->messages[$this->bindings[$binding]['operations'][$operation]['output']['message']];
                    }
                    // Set operation style if necessary, but do not override one already provided
                    if (isset($bindingData['style']) && !isset($this->bindings[$binding]['operations'][$operation]['style'])) {
                        $this->bindings[$binding]['operations'][$operation]['style'] = $bindingData['style'];
                    }
                    $this->bindings[$binding]['operations'][$operation]['transport']     = isset($bindingData['transport']) ? $bindingData['transport'] : '';
                    $this->bindings[$binding]['operations'][$operation]['documentation'] = isset($this->portTypes[$bindingData['portType']][$operation]['documentation']) ? $this->portTypes[$bindingData['portType']][$operation]['documentation'] : '';
                    $this->bindings[$binding]['operations'][$operation]['endpoint']      = isset($bindingData['endpoint']) ? $bindingData['endpoint'] : '';
                }
            }
        }
    }

    /**
     * Parses the Wsdl document
     *
     * @param string $wsdl path or URL
     * @return bool
     */
    private function parseWSDL($wsdl = '')
    {
        $this->debug("parse WSDL at path=$wsdl");
        if ('' === $wsdl) {
            $this->debug('no Wsdl passed to parseWSDL()!!');
            $this->setError('no Wsdl passed to parseWSDL()!!');

            return false;
        }

        // parse $wsdl for url format
        $wsdl_props = parse_url($wsdl);
        if (isset($wsdl_props['scheme']) && ('http' === $wsdl_props['scheme'] || 'https' === $wsdl_props['scheme'])) {
            $this->debug('getting WSDL http(s) URL ' . $wsdl);
            // get Wsdl
            $tr                 = new Soap_transport_http($wsdl, $this->curl_options, $this->use_curl);
            $tr->request_method = 'GET';
            $tr->useSOAPAction  = false;
            if ($this->proxyhost && $this->proxyport) {
                $tr->setProxy($this->proxyhost, $this->proxyport, $this->proxyusername, $this->proxypassword);
            }
            if ('' !== $this->authtype) {
                $tr->setCredentials($this->username, $this->password, $this->authtype, [], $this->certRequest);
            }
            $tr->setEncoding('gzip, deflate');
            $wsdl_string = $tr->send('', $this->timeout, $this->response_timeout);
            //$this->debug("WSDL request\n" . $tr->outgoing_payload);
            //$this->debug("WSDL response\n" . $tr->incoming_payload);
            $this->appendDebug($tr->getDebug());
            // catch errors
            if (false !== ($err = $tr->getError())) {
                $errstr = 'Getting ' . $wsdl . ' - HTTP ERROR: ' . $err;
                $this->debug($errstr);
                $this->setError($errstr);
                unset($tr);

                return false;
            }
            unset($tr);
            $this->debug('got WSDL URL');
        } else {
            // $wsdl is not http(s), so treat it as a file URL or plain file path
            $path = $wsdl;
            if (isset($wsdl_props['scheme']) && ('file' === $wsdl_props['scheme']) && isset($wsdl_props['path'])) {
                $path = isset($wsdl_props['host']) ? ($wsdl_props['host'] . ':' . $wsdl_props['path']) : $wsdl_props['path'];
            }
            $this->debug('getting WSDL file ' . $path);
            if (false !== ($fp = @fopen($path, 'rb'))) {
                $wsdl_string = '';
                while (false !== ($data = fread($fp, 32768))) {
                    $wsdl_string .= $data;
                }
                fclose($fp);
            } else {
                $errstr = "Bad path to WSDL file $path";
                $this->debug($errstr);
                $this->setError($errstr);

                return false;
            }
        }
        $this->debug('Parse WSDL');
        // end new code added
        // Create an XML parser.
        $this->parser = xml_parser_create();
        // Set the options for parsing the XML data.
        // xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
        xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
        // Set the object for the parser.
        xml_set_object($this->parser, $this);
        // Set the element handlers for the parser.
        xml_set_element_handler($this->parser, 'start_element', 'end_element');
        xml_set_character_data_handler($this->parser, 'character_data');
        // Parse the XML file.
        if (!xml_parse($this->parser, $wsdl_string, true)) {
            // Display an error message.
            $errstr = sprintf('XML error parsing WSDL from %s on line %d: %s', $wsdl, xml_get_current_line_number($this->parser), xml_error_string(xml_get_error_code($this->parser)));
            $this->debug($errstr);
            $this->debug("XML payload:\n" . $wsdl_string);
            $this->setError($errstr);
            xml_parser_free($this->parser);
            unset($this->parser);

            return false;
        }
        // free the parser
        xml_parser_free($this->parser);
        unset($this->parser);
        $this->debug('Parsing WSDL done');
        // catch Wsdl parse errors
        if ($this->getError()) {
            return false;
        }

        return true;
    }

    /**
     * Start-element handler
     *
     * @param string       $parser XML parser object
     * @param string       $name   element name
     * @param string|array $attrs  associative array of attributes
     */
    private function start_element($parser, $name, $attrs)

The method start_element() is not used, and could be removed.

    {
        if ('schema' === $this->status) {
            $this->currentSchema->schemaStartElement($parser, $name, $attrs);
            $this->appendDebug($this->currentSchema->getDebug());
            $this->currentSchema->clearDebug();
        } elseif (preg_match('/schema$/', $name)) {
            $this->debug('Parsing WSDL schema');
            // $this->debug("startElement for $name ($attrs[name]). status = $this->status (".$this->getLocalPart($name).")");
            $this->status        = 'schema';
            $this->currentSchema = new Nusoap_xmlschema('', '', $this->namespaces);
            $this->currentSchema->schemaStartElement($parser, $name, $attrs);
            $this->appendDebug($this->currentSchema->getDebug());
            $this->currentSchema->clearDebug();
        } else {
            // position in the total number of elements, starting from 0
            $pos   = $this->position++;
            $depth = $this->depth++;
            // set self as current value for this depth
            $this->depth_array[$depth] = $pos;
            $this->message[$pos]       = ['cdata' => ''];
            // process attributes
            if (is_array($attrs) && count($attrs) > 0) {
                // register namespace declarations
                foreach ($attrs as $k => $v) {
                    if (preg_match('/^xmlns/', $k)) {
                        if (false !== ($ns_prefix = mb_substr(mb_strrchr($k, ':'), 1))) {
                            $this->namespaces[$ns_prefix] = $v;
                        } else {
                            $this->namespaces['ns' . (count($this->namespaces) + 1)] = $v;
                        }
                        if ('http://www.w3.org/2001/XMLSchema' === $v || 'http://www.w3.org/1999/XMLSchema' === $v || 'http://www.w3.org/2000/10/XMLSchema' === $v) {
                            $this->XMLSchemaVersion  = $v;
                            $this->namespaces['xsi'] = $v . '-instance';
                        }
                    }
                }
                // expand each attribute prefix to its namespace
                foreach ($attrs as $k => $v) {
                    $k = mb_strpos($k, ':') ? $this->expandQname($k) : $k;
                    if ('location' !== $k && 'soapAction' !== $k && 'namespace' !== $k) {
                        $v = mb_strpos($v, ':') ? $this->expandQname($v) : $v;
                    }
                    $eAttrs[$k] = $v;
                }
                $attrs = $eAttrs;

The variable $eAttrs seems to be defined by a foreach iteration on line 4915. Are you sure the iterator is never empty, otherwise this variable is not defined?

            } else {
                $attrs = [];
            }
            // Set default prefix and namespace
            // to prevent error Undefined variable $prefix and $namespace if (preg_match('/:/', $name)) return 0 or FALSE
            $prefix    = '';
            $namespace = '';
            // get element prefix, namespace and name
            if (preg_match('/:/', $name)) {
                // get ns prefix
                $prefix = mb_substr($name, 0, mb_strpos($name, ':'));
                // get ns
                $namespace = isset($this->namespaces[$prefix]) ? $this->namespaces[$prefix] : '';
                // get unqualified name
                $name = mb_substr(mb_strstr($name, ':'), 1);
            }
            // process attributes, expanding any prefixes to namespaces
            // find status, register data
            switch ($this->status) {
                case 'message':
                    if ('part' === $name) {
                        if (isset($attrs['type'])) {
                            $this->debug('msg ' . $this->currentMessage . ": found part (with type) $attrs[name]: " . implode(',', $attrs));
                            $this->messages[$this->currentMessage][$attrs['name']] = $attrs['type'];
                        }
                        if (isset($attrs['element'])) {
                            $this->debug('msg ' . $this->currentMessage . ": found part (with element) $attrs[name]: " . implode(',', $attrs));
                            $this->messages[$this->currentMessage][$attrs['name']] = $attrs['element'] . '^';
                        }
                    }

                    break;
                case 'portType':
                    switch ($name) {
                        case 'operation':
                            $this->currentPortOperation = $attrs['name'];

The property currentPortOperation does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                            $this->debug("portType $this->currentPortType operation: $this->currentPortOperation");
                            if (isset($attrs['parameterOrder'])) {
                                $this->portTypes[$this->currentPortType][$attrs['name']]['parameterOrder'] = $attrs['parameterOrder'];
                            }

                            break;
                        case 'documentation':
                            $this->documentation = true;

                            break;
                        // merge input/output data
                        default:
                            $m                                                                                      = isset($attrs['message']) ? $this->getLocalPart($attrs['message']) : '';
                            $this->portTypes[$this->currentPortType][$this->currentPortOperation][$name]['message'] = $m;

                            break;
                    }

                    break;
                case 'binding':
                    switch ($name) {
                        case 'binding':
                            // get ns prefix

                            if (isset($attrs['style'])) {
                                $this->bindings[$this->currentBinding]['prefix'] = $prefix;
                            }
                            $this->bindings[$this->currentBinding] = array_merge($this->bindings[$this->currentBinding], $attrs);

                            break;
                        case 'header':
                            $this->bindings[$this->currentBinding]['operations'][$this->currentOperation][$this->opStatus]['headers'][] = $attrs;

                            break;
                        case 'operation':
                            if (isset($attrs['soapAction'])) {
                                $this->bindings[$this->currentBinding]['operations'][$this->currentOperation]['soapAction'] = $attrs['soapAction'];
                            }
                            if (isset($attrs['style'])) {
                                $this->bindings[$this->currentBinding]['operations'][$this->currentOperation]['style'] = $attrs['style'];
                            }
                            if (isset($attrs['name'])) {
                                $this->currentOperation = $attrs['name'];
                                $this->debug("current binding operation: $this->currentOperation");
                                $this->bindings[$this->currentBinding]['operations'][$this->currentOperation]['name']     = $attrs['name'];
                                $this->bindings[$this->currentBinding]['operations'][$this->currentOperation]['binding']  = $this->currentBinding;
                                $this->bindings[$this->currentBinding]['operations'][$this->currentOperation]['endpoint'] = isset($this->bindings[$this->currentBinding]['endpoint']) ? $this->bindings[$this->currentBinding]['endpoint'] : '';
                            }

                            break;
                        case 'input':
                            $this->opStatus = 'input';

The property opStatus does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                            break;
                        case 'output':
                            $this->opStatus = 'output';

                            break;
                        case 'body':
                            if (isset($this->bindings[$this->currentBinding]['operations'][$this->currentOperation][$this->opStatus])) {
                                $this->bindings[$this->currentBinding]['operations'][$this->currentOperation][$this->opStatus] = array_merge($this->bindings[$this->currentBinding]['operations'][$this->currentOperation][$this->opStatus], $attrs);
                            } else {
                                $this->bindings[$this->currentBinding]['operations'][$this->currentOperation][$this->opStatus] = $attrs;
                            }

                            break;
                    }

                    break;
                case 'service':
                    switch ($name) {
                        case 'port':
                            $this->currentPort = $attrs['name'];
                            $this->debug('current port: ' . $this->currentPort);
                            $this->ports[$this->currentPort]['binding'] = $this->getLocalPart($attrs['binding']);

                            break;
                        case 'address':
                            $this->ports[$this->currentPort]['location']                                = $attrs['location'];
                            $this->ports[$this->currentPort]['bindingType']                             = $namespace;
                            $this->bindings[$this->ports[$this->currentPort]['binding']]['bindingType'] = $namespace;
                            $this->bindings[$this->ports[$this->currentPort]['binding']]['endpoint']    = $attrs['location'];

                            break;
                    }

                    break;
            }
            // set status
            switch ($name) {
                case 'import':
                    if (isset($attrs['location'])) {
                        $this->import[$attrs['namespace']][] = ['location' => $attrs['location'], 'loaded' => false];
                        $this->debug('parsing import ' . $attrs['namespace'] . ' - ' . $attrs['location'] . ' (' . count($this->import[$attrs['namespace']]) . ')');
                    } else {
                        $this->import[$attrs['namespace']][] = ['location' => '', 'loaded' => true];
                        if (!$this->getPrefixFromNamespace($attrs['namespace'])) {
                            $this->namespaces['ns' . (count($this->namespaces) + 1)] = $attrs['namespace'];
                        }
                        $this->debug('parsing import ' . $attrs['namespace'] . ' - [no location] (' . count($this->import[$attrs['namespace']]) . ')');
                    }

                    break;
                //wait for schema
                //case 'types':
                //	$this->status = 'schema';
                //	break;
                case 'message':
                    $this->status                   = 'message';
                    $this->messages[$attrs['name']] = [];
                    $this->currentMessage           = $attrs['name'];

                    break;
                case 'portType':
                    $this->status                    = 'portType';
                    $this->portTypes[$attrs['name']] = [];
                    $this->currentPortType           = $attrs['name'];

                    break;
                case 'binding':
                    if (isset($attrs['name'])) {
                        // get binding name
                        if (mb_strpos($attrs['name'], ':')) {
                            $this->currentBinding = $this->getLocalPart($attrs['name']);
                        } else {
                            $this->currentBinding = $attrs['name'];
                        }
                        $this->status                                      = 'binding';
                        $this->bindings[$this->currentBinding]['portType'] = $this->getLocalPart($attrs['type']);
                        $this->debug("current binding: $this->currentBinding of portType: " . $attrs['type']);
                    }

                    break;
                case 'service':
                    $this->serviceName = $attrs['name'];

The property serviceName does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                    $this->status      = 'service';
                    $this->debug('current service: ' . $this->serviceName);

                    break;
                case 'definitions':
                    foreach ($attrs as $name => $value) {

$name is overwriting one of the parameters of this function.

                        $this->wsdl_info[$name] = $value;

The property wsdl_info does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                    }

                    break;
            }
        }
    }

    /**
     * End-element handler
     *
     * @param string $parser XML parser object
     * @param string $name   element name
     */
    private function end_element($parser, $name)

The method end_element() is not used, and could be removed.

    {
        // unset schema status
        if (/*preg_match('/types$/', $name) ||*/
        preg_match('/schema$/', $name)) {
            $this->status = '';
            $this->appendDebug($this->currentSchema->getDebug());
            $this->currentSchema->clearDebug();
            $this->schemas[$this->currentSchema->schemaTargetNamespace][] = $this->currentSchema;
            $this->debug('Parsing WSDL schema done');
        }
        if ('schema' === $this->status) {
            $this->currentSchema->schemaEndElement($parser, $name);
        } else {
            // bring depth down a notch
            $this->depth--;
        }
        // end documentation
        if ($this->documentation) {
            //TODO: track the node to which documentation should be assigned; it can be a part, message, etc.
            //$this->portTypes[$this->currentPortType][$this->currentPortOperation]['documentation'] = $this->documentation;
            $this->documentation = false;
        }
    }

    /**
     * Element content handler
     *
     * @param string $parser XML parser object
     * @param string $data   element content
     */
    private function character_data($parser, $data)

The method character_data() is not used, and could be removed.

The parameter $parser is not used and could be removed.

    {
        $pos = isset($this->depth_array[$this->depth]) ? $this->depth_array[$this->depth] : 0;
        if (isset($this->message[$pos]['cdata'])) {
            $this->message[$pos]['cdata'] .= $data;
        }
        if ($this->documentation) {
            $this->documentation .= $data;
        }
    }

    /**
     * If authenticating, set user credentials here
     *
     * @param    string $username
     * @param    string $password
     * @param    string $authtype    (basic|digest|certificate|ntlm)
     * @param    array  $certRequest (keys must be cainfofile (optional), sslcertfile, sslkeyfile, passphrase, certpassword (optional), verifypeer (optional), verifyhost (optional): see corresponding options in cURL docs)
     */
    public function setCredentials($username, $password, $authtype = 'basic', $certRequest = [])
    {
        $this->debug("setCredentials username=$username authtype=$authtype certRequest=");
        $this->appendDebug($this->varDump($certRequest));
        $this->username    = $username;
        $this->password    = $password;
        $this->authtype    = $authtype;
        $this->certRequest = $certRequest;
    }

    /**
     * @param $binding
     * @return mixed
     */
    public function getBindingData($binding)
    {
        if (is_array($this->bindings[$binding])) {
            return $this->bindings[$binding];
        }
    }

    /**
     * Returns an assoc array of operation names => operation data
     *
     * @param string $portName    WSDL port name
     * @param string $bindingType eg: soap, smtp, dime (only soap and soap12 are currently supported)
     * @return array
     */
    public function getOperations($portName = '', $bindingType = 'soap')
    {
        $ops = [];
        if ('soap' === $bindingType) {
            $bindingType = 'http://schemas.xmlsoap.org/wsdl/soap/';
        } elseif ('soap12' === $bindingType) {
            $bindingType = 'http://schemas.xmlsoap.org/wsdl/soap12/';
        } else {
            $this->debug("getOperations bindingType $bindingType may not be supported");
        }
        $this->debug("getOperations for port '$portName' bindingType $bindingType");
        // loop thru ports
        foreach ($this->ports as $port => $portData) {
            $this->debug("getOperations checking port $port bindingType " . $portData['bindingType']);
            if ('' === $portName || $port === $portName) {
                // binding type of port matches parameter
                if ($portData['bindingType'] === $bindingType) {
                    $this->debug("getOperations found port $port bindingType $bindingType");
                    //$this->debug("port data: " . $this->varDump($portData));
                    //$this->debug("bindings: " . $this->varDump($this->bindings[ $portData['binding'] ]));
                    // merge bindings
                    if (isset($this->bindings[$portData['binding']]['operations'])) {
                        $ops = array_merge($ops, $this->bindings[$portData['binding']]['operations']);
                    }
                }
            }
        }
        if (0 === count($ops)) {
            $this->debug("getOperations found no operations for port '$portName' bindingType $bindingType");
        }

        return $ops;
    }

    /**
     * Returns an associative array of data necessary for calling an operation
     *
     * @param string $operation   name of operation
     * @param string $bindingType type of binding eg: soap, soap12
     * @return array
     */
    public function getOperationData($operation, $bindingType = 'soap')
    {
        if ('soap' === $bindingType) {
            $bindingType = 'http://schemas.xmlsoap.org/wsdl/soap/';
        } elseif ('soap12' === $bindingType) {
            $bindingType = 'http://schemas.xmlsoap.org/wsdl/soap12/';
        }
        // loop thru ports
        foreach ($this->ports as $port => $portData) {
            // binding type of port matches parameter
            if ($portData['bindingType'] === $bindingType) {
                // get binding
                //foreach($this->bindings[ $portData['binding'] ]['operations'] as $bOperation => $opData) {
                foreach (array_keys($this->bindings[$portData['binding']]['operations']) as $bOperation) {
                    // note that we could/should also check the namespace here
                    if ($operation === $bOperation) {
                        $opData = $this->bindings[$portData['binding']]['operations'][$operation];

                        return $opData;
                    }
                }
            }
        }
    }

    /**
     * Returns an associative array of data necessary for calling an operation
     *
     * @param string $soapAction  soapAction for operation
     * @param string $bindingType type of binding eg: soap, soap12
     * @return array
     */
    public function getOperationDataForSoapAction($soapAction, $bindingType = 'soap')
    {
        if ('soap' === $bindingType) {
            $bindingType = 'http://schemas.xmlsoap.org/wsdl/soap/';
        } elseif ('soap12' === $bindingType) {
            $bindingType = 'http://schemas.xmlsoap.org/wsdl/soap12/';
        }
        // loop thru ports
        foreach ($this->ports as $port => $portData) {
            // binding type of port matches parameter
            if ($portData['bindingType'] === $bindingType) {
                // loop through operations for the binding
                foreach ($this->bindings[$portData['binding']]['operations'] as $bOperation => $opData) {
                    if ($opData['soapAction'] === $soapAction) {
                        return $opData;
                    }
                }
            }
        }
    }

    /**
     * Returns an array of information about a given type
     * Returns false if no type exists by the given name
     *
     *     typeDef = array(
     *     'elements' => array(), // refs to elements array
     *    'restrictionBase' => '',
     *    'phpType' => '',
     *    'order' => '(sequence|all)',
     *    'attrs' => array() // refs to attributes array
     *    )
     *
     * @param string $type the type
     * @param string $ns   namespace (not prefix) of the type
     * @return mixed
     * @see    Nusoap_xmlschema
     */
    public function getTypeDef($type, $ns)
    {
        $this->debug("in getTypeDef: type=$type, ns=$ns");
        if ((!$ns) && isset($this->namespaces['tns'])) {
            $ns = $this->namespaces['tns'];
            $this->debug("in getTypeDef: type namespace forced to $ns");
        }
        if (!isset($this->schemas[$ns])) {
            foreach ($this->schemas as $ns0 => $schema0) {
                if (0 === strcasecmp($ns, $ns0)) {
                    $this->debug("in getTypeDef: replacing schema namespace $ns with $ns0");
                    $ns = $ns0;
                    break;
                }
            }
        }
        if (isset($this->schemas[$ns])) {
            $this->debug("in getTypeDef: have schema for namespace $ns");
            for ($i = 0, $iMax = count($this->schemas[$ns]); $i < $iMax; ++$i) {
                $xs = $this->schemas[$ns][$i];
                $t  = $xs->getTypeDef($type);
                $this->appendDebug($xs->getDebug());
                $xs->clearDebug();
                if ($t) {
                    $this->debug("in getTypeDef: found type $type");
                    if (!isset($t['phpType'])) {
                        // get info for type to tack onto the element
                        $uqType = mb_substr($t['type'], mb_strrpos($t['type'], ':') + 1);
                        $ns     = mb_substr($t['type'], 0, mb_strrpos($t['type'], ':'));
                        $etype  = $this->getTypeDef($uqType, $ns);
                        if ($etype) {
                            $this->debug("found type for [element] $type:");
                            $this->debug($this->varDump($etype));
                            if (isset($etype['phpType'])) {
                                $t['phpType'] = $etype['phpType'];
                            }
                            if (isset($etype['elements'])) {
                                $t['elements'] = $etype['elements'];
                            }
                            if (isset($etype['attrs'])) {
                                $t['attrs'] = $etype['attrs'];
                            }
                        } else {
                            $this->debug("did not find type for [element] $type");
                        }
                    }

                    return $t;
                }
            }
            $this->debug("in getTypeDef: did not find type $type");
        } else {
            $this->debug("in getTypeDef: do not have schema for namespace $ns");
        }

        return false;
    }

    /**
     * Prints html description of services
     */
    public function webDescription()
    {
        global $_SERVER;
        if (null !== $_SERVER) {
            $PHP_SELF = $_SERVER['PHP_SELF'];
        } else {
            $this->setError(' _SERVER is not available');
        }

        $b = '
		<html><head><title>NuSOAP: ' . $this->serviceName . '</title>
		<style type="text/css">
		    body    { font-family: arial sans-serif; color: #000000; background-color: #ffffff; margin: 0px 0px 0px 0px; }
		    p       { font-family: arial sans-serif; color: #000000; margin-top: 0px; margin-bottom: 12px; }
		    pre { background-color: silver; padding: 5px; font-family: Courier New; font-size: x-small; color: #000000;}
		    ul      { margin-top: 10px; margin-left: 20px; }
		    li      { list-style-type: none; margin-top: 10px; color: #000000; }
		    .content{
			margin-left: 0px; padding-bottom: 2em; }
		    .nav {
			padding-top: 10px; padding-bottom: 10px; padding-left: 15px; font-size: .70em;
			margin-top: 10px; margin-left: 0px; color: #000000;
			background-color: #ccccff; width: 20%; margin-left: 20px; margin-top: 20px; }
		    .title {
			font-family: arial sans-serif; font-size: 26px; color: #ffffff;
			background-color: #999999; width: 100%;
			margin-left: 0px; margin-right: 0px;
			padding-top: 10px; padding-bottom: 10px;}
		    .hidden {
			position: absolute; visibility: hidden; z-index: 200; left: 250px; top: 100px;
			font-family: arial sans-serif; overflow: hidden; width: 600;
			padding: 20px; font-size: 10px; background-color: #999999;
			layer-background-color:#FFFFFF; }
		    a,a:active  { color: charcoal; font-weight: bold; }
		    a:visited   { color: #666666; font-weight: bold; }
		    a:hover     { color: cc3300; font-weight: bold; }
		</style>
		<script language="JavaScript" type="text/javascript">
		<!--
		// POP-UP CAPTIONS...
		function lib_bwcheck(){ //Browsercheck (needed)
		    this.ver=navigator.appVersion
		    this.agent=navigator.userAgent
		    this.dom=document.getElementById?1:0
		    this.opera5=this.agent.indexOf("Opera 5")>-1
		    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0;
		    this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
		    this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
		    this.ie=this.ie4||this.ie5||this.ie6
		    this.mac=this.agent.indexOf("Mac")>-1
		    this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0;
		    this.ns4=(document.layers && !this.dom)?1:0;
		    this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5)
		    return this
		}
		var bw = new lib_bwcheck()
		//Makes crossbrowser object.
		function makeObj(obj){
		    this.evnt=bw.dom? document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?document.layers[obj]:0;
		    if(!this.evnt) return false
		    this.css=bw.dom||bw.ie4?this.evnt.style:bw.ns4?this.evnt:0;
		    this.wref=bw.dom||bw.ie4?this.evnt:bw.ns4?this.css.document:0;
		    this.writeIt=b_writeIt;
		    return this
		}
		// A unit of measure that will be added when setting the position of a layer.
		//var px = bw.ns4||window.opera?"":"px";
		function b_writeIt(text){
		    if (bw.ns4){this.wref.write(text);this.wref.close()}
		    else this.wref.innerHTML = text
		}
		//Shows the messages
		var oDesc;
		function popup(divid){
		    if(oDesc = new makeObj(divid)){
			oDesc.css.visibility = "visible"
		    }
		}
		function popout(){ // Hides message
		    if(oDesc) oDesc.css.visibility = "hidden"
		}
		//-->
		</script>
		</head>
		<body>
		<div class=content>
			<br><br>
			<div class=title>' . $this->serviceName . '</div>
			<div class=nav>
				<p>View the <a href="' . $PHP_SELF . '?wsdl">WSDL</a> for the service.

The variable $PHP_SELF does not seem to be defined for all execution paths leading up to this point.

				Click on an operation name to view it&apos;s details.</p>
				<ul>';
        foreach ($this->getOperations() as $op => $data) {
            $b .= "<li><a href='#' onclick=\"popout();popup('$op')\">$op</a></li>";
            // create hidden div
            $b .= "<div id='$op' class='hidden'>
                    <a href='#' onclick='popout()'><span style='color: #ffffff; '>Close</span></a><br><br>";
            foreach ($data as $donnie => $marie) {
                // loop through opdata
                if ('input' === $donnie || 'output' === $donnie) {
                    // show input/output data
                    $b .= "<font color='white'>" . ucfirst($donnie) . ':</font><br>';
                    foreach ($marie as $captain => $tenille) {
                        // loop through data
                        if ('parts' === $captain) {
                            // loop thru parts
                            $b .= "&nbsp;&nbsp;$captain:<br>";
                            //if(is_array($tenille)){
                            foreach ($tenille as $joanie => $chachi) {
                                $b .= "&nbsp;&nbsp;&nbsp;&nbsp;$joanie: $chachi<br>";
                            }
                            //}
                        } else {
                            $b .= "&nbsp;&nbsp;$captain: $tenille<br>";
                        }
                    }
                } else {
                    $b .= "<font color='white'>" . ucfirst($donnie) . ":</font> $marie<br>";
                }
            }
            $b .= '</div>';
        }
        $b .= '
				<ul>
			</div>
		</div></body></html>';

        return $b;
    }

    /**
     * Serialize the parsed Wsdl
     *
     * @param mixed $debug whether to put debug=1 in endpoint URL
     * @return string serialization of WSDL
     */
    public function serialize($debug = 0)
    {
        $xml = '<?xml version="1.0" encoding="ISO-8859-1"?>';
        $xml .= "\n<definitions";
        foreach ($this->namespaces as $k => $v) {
            $xml .= " xmlns:$k=\"$v\"";
        }
        // 10.9.02 - add poulter fix for Wsdl and tns declarations
        if (isset($this->namespaces['Wsdl'])) {
            $xml .= ' xmlns="' . $this->namespaces['Wsdl'] . '"';
        }
        if (isset($this->namespaces['tns'])) {
            $xml .= ' targetNamespace="' . $this->namespaces['tns'] . '"';
        }
        $xml .= '>';
        // imports
        if (is_array($this->import) && count($this->import) > 0) {
            foreach ($this->import as $ns => $list) {
                foreach ($list as $ii) {
                    if ('' !== $ii['location']) {
                        $xml .= '<import location="' . $ii['location'] . '" namespace="' . $ns . '" >';
                    } else {
                        $xml .= '<import namespace="' . $ns . '" >';
                    }
                }
            }
        }
        // types
        if (is_array($this->schemas) && count($this->schemas) >= 1) {
            $xml .= "\n<types>\n";
            foreach ($this->schemas as $ns => $list) {
                foreach ($list as $xs) {
                    $xml .= $xs->serializeSchema();
                }
            }
            $xml .= '</types>';
        }
        // messages
        if (is_array($this->messages) && count($this->messages) >= 1) {
            foreach ($this->messages as $msgName => $msgParts) {
                $xml .= "\n<message name=\"" . $msgName . '">';
                if (is_array($msgParts)) {
                    foreach ($msgParts as $partName => $partType) {
                        // print 'serializing '.$partType.', sv: '.$this->XMLSchemaVersion.'<br>';
                        if (mb_strpos($partType, ':')) {
                            $typePrefix = $this->getPrefixFromNamespace($this->getPrefix($partType));

It seems like $this->getPrefix($partType) can also be of type false; however, parameter $ns of Nusoap_base::getPrefixFromNamespace() does only seem to accept string, maybe add an additional type check?

                        } elseif (isset($this->typemap[$this->namespaces['xsd']][$partType])) {
                            // print 'checking typemap: '.$this->XMLSchemaVersion.'<br>';
                            $typePrefix = 'xsd';
                        } else {
                            foreach ($this->typemap as $ns => $types) {
                                if (isset($types[$partType])) {
                                    $typePrefix = $this->getPrefixFromNamespace($ns);
                                }
                            }
                            if (!isset($typePrefix)) {
                                die("$partType has no namespace!");

Using exit here is not recommended.

                            }
                        }
                        $ns        = $this->getNamespaceFromPrefix($typePrefix);
                        $localPart = $this->getLocalPart($partType);
                        $typeDef   = $this->getTypeDef($localPart, $ns);

It seems like $ns can also be of type false; however, parameter $ns of Wsdl::getTypeDef() does only seem to accept string, maybe add an additional type check?

                        if ('element' === $typeDef['typeClass']) {
                            $elementortype = 'element';
                            if ('^' === mb_substr($localPart, -1)) {
                                $localPart = mb_substr($localPart, 0, -1);
                            }
                        } else {
                            $elementortype = 'type';
                        }
                        $xml .= "\n" . '  <part name="' . $partName . '" ' . $elementortype . '="' . $typePrefix . ':' . $localPart . '" >';
                    }
                }
                $xml .= '</message>';
            }
        }
        // bindings & porttypes
        if (is_array($this->bindings) && count($this->bindings) >= 1) {
            $binding_xml  = '';
            $portType_xml = '';
            foreach ($this->bindings as $bindingName => $attrs) {
                $binding_xml  .= "\n<binding name=\"" . $bindingName . '" type="tns:' . $attrs['portType'] . '">';
                $binding_xml  .= "\n" . '  <soap:binding style="' . $attrs['style'] . '" transport="' . $attrs['transport'] . '">';
                $portType_xml .= "\n<portType name=\"" . $attrs['portType'] . '">';
                foreach ($attrs['operations'] as $opName => $opParts) {
                    $binding_xml .= "\n" . '  <operation name="' . $opName . '">';
                    $binding_xml .= "\n" . '    <soap:operation soapAction="' . $opParts['soapAction'] . '" style="' . $opParts['style'] . '">';
                    $enc_style   = '';
                    if (isset($opParts['input']['encodingStyle']) && '' !== $opParts['input']['encodingStyle']) {
                        $enc_style = ' encodingStyle="' . $opParts['input']['encodingStyle'] . '"';
                    }
                    $binding_xml .= "\n" . '    <input><soap:body use="' . $opParts['input']['use'] . '" namespace="' . $opParts['input']['namespace'] . '"' . $enc_style . '></input>';
                    $enc_style   = '';
                    if (isset($opParts['output']['encodingStyle']) && '' !== $opParts['output']['encodingStyle']) {
                        $enc_style = ' encodingStyle="' . $opParts['output']['encodingStyle'] . '"';
                    }
                    $binding_xml  .= "\n" . '    <output><soap:body use="' . $opParts['output']['use'] . '" namespace="' . $opParts['output']['namespace'] . '"' . $enc_style . '></output>';
                    $binding_xml  .= "\n" . '  </operation>';
                    $portType_xml .= "\n" . '  <operation name="' . $opParts['name'] . '"';
                    if (isset($opParts['parameterOrder'])) {
                        $portType_xml .= ' parameterOrder="' . $opParts['parameterOrder'] . '"';
                    }
                    $portType_xml .= '>';
                    if (isset($opParts['documentation']) && '' !== $opParts['documentation']) {
                        $portType_xml .= "\n" . '    <documentation>' . htmlspecialchars($opParts['documentation']) . '</documentation>';
                    }
                    $portType_xml .= "\n" . '    <input message="tns:' . $opParts['input']['message'] . '">';
                    $portType_xml .= "\n" . '    <output message="tns:' . $opParts['output']['message'] . '">';
                    $portType_xml .= "\n" . '  </operation>';
                }
                $portType_xml .= "\n" . '</portType>';
                $binding_xml  .= "\n" . '</binding>';
            }
            $xml .= $portType_xml . $binding_xml;
        }
        // services
        $xml .= "\n<service name=\"" . $this->serviceName . '">';
        if (is_array($this->ports) && count($this->ports) >= 1) {
            foreach ($this->ports as $pName => $attrs) {
                $xml .= "\n" . '  <port name="' . $pName . '" binding="tns:' . $attrs['binding'] . '">';
                $xml .= "\n" . '    <soap:address location="' . $attrs['location'] . ($debug ? '?debug=1' : '') . '">';
                $xml .= "\n" . '  </port>';
            }
        }
        $xml .= "\n" . '</service>';

        return $xml . "\n</definitions>";
    }

    /**
     * Determine whether a set of parameters are unwrapped
     * when they are expect to be wrapped, Microsoft-style.
     *
     * @param string $type       the type (element name) of the wrapper
     * @param array  $parameters the parameter values for the SOAP call
     * @return bool whether they parameters are unwrapped (and should be wrapped)
     */
    private function parametersMatchWrapped($type, &$parameters)
    {
        $this->debug("in parametersMatchWrapped type=$type, parameters=");
        $this->appendDebug($this->varDump($parameters));
        // split type into namespace:unqualified-type
        if (mb_strpos($type, ':')) {
            $uqType = mb_substr($type, mb_strrpos($type, ':') + 1);
            $ns     = mb_substr($type, 0, mb_strrpos($type, ':'));
            $this->debug("in parametersMatchWrapped: got a prefixed type: $uqType, $ns");
            if ($this->getNamespaceFromPrefix($ns)) {
                $ns = $this->getNamespaceFromPrefix($ns);
                $this->debug("in parametersMatchWrapped: expanded prefixed type: $uqType, $ns");
            }
        } else {
            // TODO: should the type be compared to types in XSD, and the namespace
            // set to XSD if the type matches?
            $this->debug("in parametersMatchWrapped: No namespace for type $type");
            $ns     = '';
            $uqType = $type;
        }

        // get the type information
        if (!$typeDef = $this->getTypeDef($uqType, $ns)) {
            $this->debug("in parametersMatchWrapped: $type ($uqType) is not a supported type.");

            return false;
        }
        $this->debug('in parametersMatchWrapped: found typeDef=');
        $this->appendDebug($this->varDump($typeDef));
        if ('^' === mb_substr($uqType, -1)) {
            $uqType = mb_substr($uqType, 0, -1);
        }
        $phpType   = $typeDef['phpType'];
        $arrayType = (isset($typeDef['arrayType']) ? $typeDef['arrayType'] : '');
        $this->debug("in parametersMatchWrapped: uqType: $uqType, ns: $ns, phptype: $phpType, arrayType: $arrayType");
        // we expect a complexType or element of complexType
        if ('struct' !== $phpType) {
            $this->debug('in parametersMatchWrapped: not a struct');

            return false;
        }

        // see whether the parameter names match the elements
        if (isset($typeDef['elements']) && is_array($typeDef['elements'])) {
            $elements = 0;
            $matches  = 0;
            foreach ($typeDef['elements'] as $name => $attrs) {
                if (isset($parameters[$name])) {
                    $this->debug("in parametersMatchWrapped: have parameter named $name");
                    ++$matches;
                } else {
                    $this->debug("in parametersMatchWrapped: do not have parameter named $name");
                }
                ++$elements;
            }

            $this->debug("in parametersMatchWrapped: $matches parameter names match $elements wrapped parameter names");
            if (0 === $matches) {
                return false;
            }

            return true;
        }

        // since there are no elements for the type, if the user passed no
        // parameters, the parameters match wrapped.
        $this->debug("in parametersMatchWrapped: no elements type $ns:$uqType");

        return 0 === count($parameters);
    }

    /**
     * Serialize PHP values according to a WSDL message definition
     * contrary to the method name, this is not limited to RPC
     *
     * TODO
     * - multi-ref serialization
     * - validate PHP values against type definitions, return errors if invalid
     *
     * @param string $operation   operation name
     * @param string $direction   (input|output)
     * @param mixed  $parameters  parameter value(s)
     * @param string $bindingType (soap|soap12)
     * @return mixed parameters serialized as XML or false on error (e.g. operation not found)
     */
    public function serializeRPCParameters($operation, $direction, $parameters, $bindingType = 'soap')
    {
        $this->debug("in serializeRPCParameters: operation=$operation, direction=$direction, XMLSchemaVersion=$this->XMLSchemaVersion, bindingType=$bindingType");
        $this->appendDebug('parameters=' . $this->varDump($parameters));
        if ('input' !== $direction && 'output' !== $direction) {
            $this->debug('The value of the \$direction argument needs to be either "input" or "output"');
            $this->setError('The value of the \$direction argument needs to be either "input" or "output"');

            return false;
        }
        if (!$opData = $this->getOperationData($operation, $bindingType)) {
            $this->debug('Unable to retrieve WSDL data for operation: ' . $operation . ' bindingType: ' . $bindingType);
            $this->setError('Unable to retrieve WSDL data for operation: ' . $operation . ' bindingType: ' . $bindingType);

            return false;
        }
        $this->debug('in serializeRPCParameters: opData:');
        $this->appendDebug($this->varDump($opData));
        // Get encoding style for output and set to current
        $encodingStyle = 'http://schemas.xmlsoap.org/soap/encoding/';
        if (('input' === $direction) && isset($opData['output']['encodingStyle']) && ($opData['output']['encodingStyle'] !== $encodingStyle)) {
            $encodingStyle = $opData['output']['encodingStyle'];
            $enc_style     = $encodingStyle;

The assignment to $enc_style is dead and can be removed.

        }

        // set input params
        $xml = '';
        if (isset($opData[$direction]['parts']) && count($opData[$direction]['parts']) > 0) {
            $parts      = &$opData[$direction]['parts'];
            $part_count = count($parts);
            $style      = $opData['style'];
            $use        = $opData[$direction]['use'];
            $this->debug("have $part_count part(s) to serialize using $style/$use");
            if (is_array($parameters)) {
                $parametersArrayType = $this->isArraySimpleOrStruct($parameters);
                $parameter_count     = count($parameters);
                $this->debug("have $parameter_count parameter(s) provided as $parametersArrayType to serialize");
                // check for Microsoft-style wrapped parameters
                if ('document' === $style && 'literal' === $use && 1 === $part_count && isset($parts['parameters'])) {
                    $this->debug('check whether the caller has wrapped the parameters');
                    if ('output' === $direction && 'arraySimple' === $parametersArrayType && 1 === $parameter_count) {
                        // TODO: consider checking here for double-wrapping, when
                        // service function wraps, then NuSOAP wraps again
                        $this->debug("change simple array to associative with 'parameters' element");
                        $parameters['parameters'] = $parameters[0];
                        unset($parameters[0]);
                    }
                    if (('arrayStruct' === $parametersArrayType || 0 === $parameter_count) && !isset($parameters['parameters'])) {
                        $this->debug('check whether caller\'s parameters match the wrapped ones');
                        if ($this->parametersMatchWrapped($parts['parameters'], $parameters)) {
                            $this->debug('wrap the parameters for the caller');
                            $parameters      = ['parameters' => $parameters];
                            $parameter_count = 1;

The assignment to $parameter_count is dead and can be removed.

                        }
                    }
                }
                foreach ($parts as $name => $type) {
                    $this->debug("serializing part $name of type $type");
                    // Track encoding style
                    if (isset($opData[$direction]['encodingStyle']) && $encodingStyle !== $opData[$direction]['encodingStyle']) {
                        $encodingStyle = $opData[$direction]['encodingStyle'];
                        $enc_style     = $encodingStyle;
                    } else {
                        $enc_style = false;
                    }
                    // NOTE: add error handling here
                    // if serializeType returns false, then catch global error and fault
                    if ('arraySimple' === $parametersArrayType) {
                        $p = array_shift($parameters);
                        $this->debug('calling serializeType w/indexed param');
                        $xml .= $this->serializeType($name, $type, $p, $use, $enc_style);
                    } elseif (isset($parameters[$name])) {
                        $this->debug('calling serializeType w/named param');
                        $xml .= $this->serializeType($name, $type, $parameters[$name], $use, $enc_style);
                    } else {
                        // TODO: only send nillable
                        $this->debug('calling serializeType w/null param');
                        $xml .= $this->serializeType($name, $type, null, $use, $enc_style);
                    }
                }
            } else {
                $this->debug('no parameters passed.');
            }
        }
        $this->debug("serializeRPCParameters returning: $xml");

        return $xml;
    }

    /**
     * Serialize a PHP value according to a WSDL message definition
     *
     * TODO
     * - multi-ref serialization
     * - validate PHP values against type definitions, return errors if invalid
     *
     * @param string $operation  operation name
     * @param string $direction  (input|output)
     * @param mixed  $parameters parameter value(s)
     * @return mixed parameters serialized as XML or false on error (e.g. operation not found)
     * @deprecated
     */
    public function serializeParameters($operation, $direction, $parameters)
    {
        $this->debug("in serializeParameters: operation=$operation, direction=$direction, XMLSchemaVersion=$this->XMLSchemaVersion");
        $this->appendDebug('parameters=' . $this->varDump($parameters));
        if ('input' !== $direction && 'output' !== $direction) {
            $this->debug('The value of the \$direction argument needs to be either "input" or "output"');
            $this->setError('The value of the \$direction argument needs to be either "input" or "output"');

            return false;
        }
        if (!$opData = $this->getOperationData($operation)) {
            $this->debug('Unable to retrieve WSDL data for operation: ' . $operation);
            $this->setError('Unable to retrieve WSDL data for operation: ' . $operation);

            return false;
        }
        $this->debug('opData:');
        $this->appendDebug($this->varDump($opData));
        // Get encoding style for output and set to current
        $encodingStyle = 'http://schemas.xmlsoap.org/soap/encoding/';
        if (('input' === $direction) && isset($opData['output']['encodingStyle']) && ($opData['output']['encodingStyle'] !== $encodingStyle)) {
            $encodingStyle = $opData['output']['encodingStyle'];
            $enc_style     = $encodingStyle;

The assignment to $enc_style is dead and can be removed.

        }

        // set input params
        $xml = '';
        if (isset($opData[$direction]['parts']) && count($opData[$direction]['parts']) > 0) {
            $use = $opData[$direction]['use'];
            $this->debug("use=$use");
            $this->debug('got ' . count($opData[$direction]['parts']) . ' part(s)');
            if (is_array($parameters)) {
                $parametersArrayType = $this->isArraySimpleOrStruct($parameters);
                $this->debug('have ' . $parametersArrayType . ' parameters');
                foreach ($opData[$direction]['parts'] as $name => $type) {
                    $this->debug('serializing part "' . $name . '" of type "' . $type . '"');
                    // Track encoding style
                    if (isset($opData[$direction]['encodingStyle']) && $encodingStyle !== $opData[$direction]['encodingStyle']) {
                        $encodingStyle = $opData[$direction]['encodingStyle'];
                        $enc_style     = $encodingStyle;
                    } else {
                        $enc_style = false;
                    }
                    // NOTE: add error handling here
                    // if serializeType returns false, then catch global error and fault
                    if ('arraySimple' === $parametersArrayType) {
                        $p = array_shift($parameters);
                        $this->debug('calling serializeType w/indexed param');
                        $xml .= $this->serializeType($name, $type, $p, $use, $enc_style);
                    } elseif (isset($parameters[$name])) {
                        $this->debug('calling serializeType w/named param');
                        $xml .= $this->serializeType($name, $type, $parameters[$name], $use, $enc_style);
                    } else {
                        // TODO: only send nillable
                        $this->debug('calling serializeType w/null param');
                        $xml .= $this->serializeType($name, $type, null, $use, $enc_style);
                    }
                }
            } else {
                $this->debug('no parameters passed.');
            }
        }
        $this->debug("serializeParameters returning: $xml");

        return $xml;
    }

    /**
     * Serializes a PHP value according a given type definition
     *
     * @param string      $name          name of value (part or element)
     * @param string      $type          XML schema type of value (type or element)
     * @param mixed       $value         a native PHP value (parameter value)
     * @param string      $use           use for part (encoded|literal)
     * @param bool|string $encodingStyle SOAP encoding style for the value (if different than the enclosing style)
     * @param bool        $unqualified   a kludge for what should be XML namespace form handling
     * @return string value serialized as an XML string
     */
    private function serializeType($name, $type, $value, $use = 'encoded', $encodingStyle = false, $unqualified = false)
    {
        $this->debug("in serializeType: name=$name, type=$type, use=$use, encodingStyle=$encodingStyle, unqualified=" . ($unqualified ? 'unqualified' : 'qualified'));
        $this->appendDebug('value=' . $this->varDump($value));
        if ('encoded' === $use && $encodingStyle) {
            $encodingStyle = ' SOAP-ENV:encodingStyle="' . $encodingStyle . '"';

Are you sure $encodingStyle of type string|true can be used in concatenation?

        }

        // if a Soapval has been supplied, let its type override the WSDL
        if (is_object($value) && 'soapval' === get_class($value)) {
            if ($value->type_ns) {
                $type      = $value->type_ns . ':' . $value->type;
                $forceType = true;
                $this->debug("in serializeType: Soapval overrides type to $type");
            } elseif ($value->type) {
                $type      = $value->type;
                $forceType = true;
                $this->debug("in serializeType: Soapval overrides type to $type");
            } else {
                $forceType = false;
                $this->debug('in serializeType: Soapval does not override type');
            }
            $attrs = $value->attributes;
            $value = $value->value;
            $this->debug("in serializeType: Soapval overrides value to $value");
            if ($attrs) {
                if (!is_array($value)) {
                    $value['!'] = $value;
                }
                foreach ($attrs as $n => $v) {
                    $value['!' . $n] = $v;
                }
                $this->debug('in serializeType: Soapval provides attributes');
            }
        } else {
            $forceType = false;
        }

        $xml = '';
        if (mb_strpos($type, ':')) {
            $uqType = mb_substr($type, mb_strrpos($type, ':') + 1);
            $ns     = mb_substr($type, 0, mb_strrpos($type, ':'));
            $this->debug("in serializeType: got a prefixed type: $uqType, $ns");
            if ($this->getNamespaceFromPrefix($ns)) {
                $ns = $this->getNamespaceFromPrefix($ns);
                $this->debug("in serializeType: expanded prefixed type: $uqType, $ns");
            }

            if ($ns === $this->XMLSchemaVersion || 'http://schemas.xmlsoap.org/soap/encoding/' === $ns) {
                $this->debug('in serializeType: type namespace indicates XML Schema or SOAP Encoding type');
                $elementNS = '';
                if ($unqualified && 'literal' === $use) {
                    $elementNS = ' xmlns=""';
                }
                if (null === $value) {
                    if ('literal' === $use) {
                        // TODO: depends on minOccurs
                        $xml = "<$name$elementNS>";
                    } else {
                        // TODO: depends on nillable, which should be checked before calling this method
                        $xml = "<$name$elementNS xsi:nil=\"true\" xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\">";

Are you sure $this->getPrefixFromNamespace($ns) of type mixed|false can be used in concatenation?

                    }
                    $this->debug("in serializeType: returning: $xml");

                    return $xml;
                }
                if ('Array' === $uqType) {
                    // JBoss/Axis does this sometimes
                    return $this->serialize_val($value, $name, false, false, false, false, $use);
                }
                if ('bool' === $uqType) {
                    if ((is_string($value) && 'false' === $value) || (!$value)) {
                        $value = 'false';
                    } else {
                        $value = 'true';
                    }
                }
                if ('string' === $uqType && is_string($value)) {
                    $value = $this->expandEntities($value);
                }
                if (('long' === $uqType || 'unsignedLong' === $uqType) && is_float($value)) {
                    $value = sprintf('%.0lf', $value);
                }
                // it's a scalar
                // TODO: what about null/nil values?
                // check type isn't a custom type extending xmlschema namespace
                if (!$this->getTypeDef($uqType, $ns)) {
                    if ('literal' === $use) {
                        $xml = "<$name$elementNS>$value</$name>";
                        if ($forceType) {
                            $xml = "<$name$elementNS xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\">$value</$name>";
                        }
                    } else {
                        $xml = "<$name$elementNS xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\"$encodingStyle>$value</$name>";
                    }
                    $this->debug("in serializeType: returning: $xml");

                    return $xml;
                }
                $this->debug('custom type extends XML Schema or SOAP Encoding namespace (yuck)');
            } elseif ('http://xml.apache.org/xml-soap' === $ns) {
                $this->debug('in serializeType: appears to be Apache SOAP type');
                if ('Map' === $uqType) {
                    $tt_prefix = $this->getPrefixFromNamespace('http://xml.apache.org/xml-soap');
                    if (!$tt_prefix) {
                        $this->debug('in serializeType: Add namespace for Apache SOAP type');
                        $tt_prefix                    = 'ns' . mt_rand(1000, 9999);
                        $this->namespaces[$tt_prefix] = 'http://xml.apache.org/xml-soap';
                        // force this to be added to usedNamespaces
                        $tt_prefix = $this->getPrefixFromNamespace('http://xml.apache.org/xml-soap');
                    }
                    $contents = '';
                    foreach ($value as $k => $v) {
                        $this->debug("serializing map element: key $k, value $v");
                        $contents .= '<item>';
                        $contents .= $this->serialize_val($k, 'key', false, false, false, false, $use);
                        $contents .= $this->serialize_val($v, 'value', false, false, false, false, $use);
                        $contents .= '</item>';
                    }
                    if ('literal' === $use) {
                        $xml = "<$name>$contents</$name>";
                        if ($forceType) {
                            $xml = "<$name xsi:type=\"" . $tt_prefix . ":$uqType\">$contents</$name>";
                        }
                    } else {
                        $xml = "<$name xsi:type=\"" . $tt_prefix . ":$uqType\"$encodingStyle>$contents</$name>";
                    }
                    $this->debug("in serializeType: returning: $xml");

                    return $xml;
                }
                $this->debug('in serializeType: Apache SOAP type, but only support Map');
            }
        } else {
            // TODO: should the type be compared to types in XSD, and the namespace
            // set to XSD if the type matches?
            $this->debug("in serializeType: No namespace for type $type");
            $ns     = '';
            $uqType = $type;
        }
        if (!$typeDef = $this->getTypeDef($uqType, $ns)) {
            $this->setError("$type ($uqType) is not a supported type.");
            $this->debug("in serializeType: $type ($uqType) is not a supported type.");

            return false;

The expression return false returns the type false which is incompatible with the documented return type string.

        }

        $this->debug('in serializeType: found typeDef');
        $this->appendDebug('typeDef=' . $this->varDump($typeDef));
        if ('^' === mb_substr($uqType, -1)) {
            $uqType = mb_substr($uqType, 0, -1);
        }
        if (!isset($typeDef['phpType'])) {
            $this->setError("$type ($uqType) has no phpType.");
            $this->debug("in serializeType: $type ($uqType) has no phpType.");

            return false;

The expression return false returns the type false which is incompatible with the documented return type string.

        }
        $phpType = $typeDef['phpType'];
        $this->debug("in serializeType: uqType: $uqType, ns: $ns, phptype: $phpType, arrayType: " . (isset($typeDef['arrayType']) ? $typeDef['arrayType'] : ''));
        // if php type == struct, map value to the <all> element names
        if ('struct' === $phpType) {
            if (isset($typeDef['typeClass']) && 'element' === $typeDef['typeClass']) {
                $elementName = $uqType;
                $elementNS   = ' xmlns=""';
                if (isset($typeDef['form']) && ('qualified' === $typeDef['form'])) {
                    $elementNS = " xmlns=\"$ns\"";
                }
            } else {
                $elementName = $name;
                $elementNS   = '';
                if ($unqualified) {
                    $elementNS = ' xmlns=""';
                }
            }
            if (null === $value) {
                if ('literal' === $use) {
                    // TODO: depends on minOccurs and nillable
                    $xml = "<$elementName$elementNS>";
                } else {
                    $xml = "<$elementName$elementNS xsi:nil=\"true\" xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\">";
                }
                $this->debug("in serializeType: returning: $xml");

                return $xml;
            }
            if (is_object($value)) {
                $value = get_object_vars($value);
            }
            if (is_array($value)) {
                $elementAttrs = $this->serializeComplexTypeAttributes($typeDef, $value, $ns, $uqType);
                if ('literal' === $use) {
                    $xml = "<$elementName$elementNS$elementAttrs>";
                    if ($forceType) {
                        $xml = "<$elementName$elementNS$elementAttrs xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\">";
                    }
                } else {
                    $xml = "<$elementName$elementNS$elementAttrs xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\"$encodingStyle>";
                }

                if (isset($typeDef['simpleContent']) && 'true' === $typeDef['simpleContent']) {
                    if (isset($value['!'])) {
                        $xml .= $value['!'];
                        $this->debug("in serializeType: serialized simpleContent for type $type");
                    } else {
                        $this->debug("in serializeType: no simpleContent to serialize for type $type");
                    }
                } else {
                    // complexContent
                    $xml .= $this->serializeComplexTypeElements($typeDef, $value, $ns, $uqType, $use, $encodingStyle);
                }
                $xml .= "</$elementName>";
            } else {
                $this->debug('in serializeType: phpType is struct, but value is not an array');
                $this->setError('phpType is struct, but value is not an array: see debug output for details');
                $xml = '';
            }
        } elseif ('array' === $phpType) {
            if (isset($typeDef['form']) && ('qualified' === $typeDef['form'])) {
                $elementNS = " xmlns=\"$ns\"";
            } else {
                $elementNS = '';
                if ($unqualified) {
                    $elementNS = ' xmlns=""';
                }
            }
            if (null === $value) {
                if ('literal' === $use) {
                    // TODO: depends on minOccurs
                    $xml = "<$name$elementNS>";
                } else {
                    $xml = "<$name$elementNS xsi:nil=\"true\" xsi:type=\""
                           . $this->getPrefixFromNamespace('http://schemas.xmlsoap.org/soap/encoding/')

Are you sure $this->getPrefixFromNamespace('http://schemas.xmlsoap.org/soap/encoding/') of type mixed|false can be used in concatenation?

                           . ':Array" '
                           . $this->getPrefixFromNamespace('http://schemas.xmlsoap.org/soap/encoding/')
                           . ':arrayType="'
                           . $this->getPrefixFromNamespace($this->getPrefix($typeDef['arrayType']))

Are you sure $this->getPrefixFromNamespace($this->getPrefix($typeDef['arrayType'])) of type mixed|false can be used in concatenation?

It seems like $this->getPrefix($typeDef['arrayType']) can also be of type false; however, parameter $ns of Nusoap_base::getPrefixFromNamespace() does only seem to accept string, maybe add an additional type check?

                           . ':'
                           . $this->getLocalPart($typeDef['arrayType'])
                           . '[0]"/>';
                }
                $this->debug("in serializeType: returning: $xml");

                return $xml;
            }
            if (isset($typeDef['multidimensional'])) {
                $nv = [];
                foreach ($value as $v) {
                    $cols = ',' . count($v);
                    $nv   = array_merge($nv, $v);
                }
                $value = $nv;
            } else {
                $cols = '';
            }
            if (is_array($value) && count($value) >= 1) {
                $rows     = count($value);
                $contents = '';
                foreach ($value as $k => $v) {
                    $this->debug("serializing array element: $k, " . (is_array($v) ? 'array' : $v) . " of type: $typeDef[arrayType]");
                    //if (strpos($typeDef['arrayType'], ':') ) {
                    if (!in_array($typeDef['arrayType'], $this->typemap['http://www.w3.org/2001/XMLSchema'], true)) {
                        $contents .= $this->serializeType('item', $typeDef['arrayType'], $v, $use);
                    } else {
                        $contents .= $this->serialize_val($v, 'item', $typeDef['arrayType'], null, $this->XMLSchemaVersion, false, $use);
                    }
                }
            } else {
                $rows     = 0;
                $contents = null;
            }
            // TODO: for now, an empty value will be serialized as a zero element
            // array.  Revisit this when coding the handling of null/nil values.
            if ('literal' === $use) {
                $xml = "<$name$elementNS>" . $contents . "</$name>";
            } else {
                $xml = "<$name$elementNS xsi:type=\""
                       . $this->getPrefixFromNamespace('http://schemas.xmlsoap.org/soap/encoding/')
                       . ':Array" '
                       . $this->getPrefixFromNamespace('http://schemas.xmlsoap.org/soap/encoding/')
                       . ':arrayType="'
                       . $this->getPrefixFromNamespace($this->getPrefix($typeDef['arrayType']))
                       . ':'
                       . $this->getLocalPart($typeDef['arrayType'])
                       . "[$rows$cols]\">"

The variable $cols does not seem to be defined for all execution paths leading up to this point.

                       . $contents
                       . "</$name>";
            }
        } elseif ('scalar' === $phpType) {
            if (isset($typeDef['form']) && ('qualified' === $typeDef['form'])) {
                $elementNS = " xmlns=\"$ns\"";
            } else {
                if ($unqualified) {
                    $elementNS = ' xmlns=""';
                } else {
                    $elementNS = '';
                }
            }
            if ('literal' === $use) {
                if ($forceType) {
                    $xml = "<$name$elementNS xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\">$value</$name>";
                } else {
                    $xml = "<$name$elementNS>$value</$name>";
                }
            } else {
                $xml = "<$name$elementNS xsi:type=\"" . $this->getPrefixFromNamespace($ns) . ":$uqType\"$encodingStyle>$value</$name>";
            }
        }
        $this->debug("in serializeType: returning: $xml");

        return $xml;
    }

    /**
     * Serializes the attributes for a complexType
     *
     * @param array  $typeDef our internal representation of an XML schema type (or element)
     * @param mixed  $value   a native PHP value (parameter value)
     * @param string $ns      the namespace of the type
     * @param string $uqType  the local part of the type
     * @return string value serialized as an XML string
     */
    private function serializeComplexTypeAttributes($typeDef, $value, $ns, $uqType)
    {
        $this->debug("serializeComplexTypeAttributes for XML Schema type $ns:$uqType");
        $xml = '';
        if (isset($typeDef['extensionBase'])) {
            $nsx     = $this->getPrefix($typeDef['extensionBase']);
            $uqTypex = $this->getLocalPart($typeDef['extensionBase']);
            if ($this->getNamespaceFromPrefix($nsx)) {

It seems like $nsx can also be of type false; however, parameter $prefix of Nusoap_base::getNamespaceFromPrefix() does only seem to accept string, maybe add an additional type check?

                $nsx = $this->getNamespaceFromPrefix($nsx);
            }
            if (false !== ($typeDefx = $this->getTypeDef($uqTypex, $nsx))) {
                $this->debug("serialize attributes for extension base $nsx:$uqTypex");
                $xml .= $this->serializeComplexTypeAttributes($typeDefx, $value, $nsx, $uqTypex);
            } else {
                $this->debug("extension base $nsx:$uqTypex is not a supported type");
            }
        }
        if (isset($typeDef['attrs']) && is_array($typeDef['attrs'])) {
            $this->debug("serialize attributes for XML Schema type $ns:$uqType");
            if (is_array($value)) {
                $xvalue = $value;
            } elseif (is_object($value)) {
                $xvalue = get_object_vars($value);
            } else {
                $this->debug("value is neither an array nor an object for XML Schema type $ns:$uqType");
                $xvalue = [];
            }
            foreach ($typeDef['attrs'] as $aName => $attrs) {
                if (isset($xvalue['!' . $aName])) {
                    $xname = '!' . $aName;
                    $this->debug("value provided for attribute $aName with key $xname");
                } elseif (isset($xvalue[$aName])) {
                    $xname = $aName;
                    $this->debug("value provided for attribute $aName with key $xname");
                } elseif (isset($attrs['default'])) {
                    $xname          = '!' . $aName;
                    $xvalue[$xname] = $attrs['default'];
                    $this->debug('use default value of ' . $xvalue[$aName] . ' for attribute ' . $aName);
                } else {
                    $xname = '';
                    $this->debug("no value provided for attribute $aName");
                }
                if ($xname) {
                    $xml .= " $aName=\"" . $this->expandEntities($xvalue[$xname]) . '"';
                }
            }
        } else {
            $this->debug("no attributes to serialize for XML Schema type $ns:$uqType");
        }

        return $xml;
    }

    /**
     * Serializes the elements for a complexType
     *
     * @param array       $typeDef       our internal representation of an XML schema type (or element)
     * @param mixed       $value         a native PHP value (parameter value)
     * @param string      $ns            the namespace of the type
     * @param string      $uqType        the local part of the type
     * @param string      $use           use for part (encoded|literal)
     * @param bool|string $encodingStyle SOAP encoding style for the value (if different than the enclosing style)
     * @return string value serialized as an XML string
     */
    private function serializeComplexTypeElements($typeDef, $value, $ns, $uqType, $use = 'encoded', $encodingStyle = false)
    {
        $this->debug("in serializeComplexTypeElements for XML Schema type $ns:$uqType");
        $xml = '';
        if (isset($typeDef['extensionBase'])) {
            $nsx     = $this->getPrefix($typeDef['extensionBase']);
            $uqTypex = $this->getLocalPart($typeDef['extensionBase']);
            if ($this->getNamespaceFromPrefix($nsx)) {

It seems like $nsx can also be of type false; however, parameter $prefix of Nusoap_base::getNamespaceFromPrefix() does only seem to accept string, maybe add an additional type check?

                $nsx = $this->getNamespaceFromPrefix($nsx);
            }
            if (false !== ($typeDefx = $this->getTypeDef($uqTypex, $nsx))) {
                $this->debug("serialize elements for extension base $nsx:$uqTypex");
                $xml .= $this->serializeComplexTypeElements($typeDefx, $value, $nsx, $uqTypex, $use, $encodingStyle);
            } else {
                $this->debug("extension base $nsx:$uqTypex is not a supported type");
            }
        }
        if (isset($typeDef['elements']) && is_array($typeDef['elements'])) {
            $this->debug("in serializeComplexTypeElements, serialize elements for XML Schema type $ns:$uqType");
            if (is_array($value)) {
                $xvalue = $value;
            } elseif (is_object($value)) {
                $xvalue = get_object_vars($value);
            } else {
                $this->debug("value is neither an array nor an object for XML Schema type $ns:$uqType");
                $xvalue = [];
            }
            // toggle whether all elements are present - ideally should validate against schema
            if (is_array($xvalue) && (count($typeDef['elements']) !== count($xvalue))) {
                $optionals = true;
            }
            foreach ($typeDef['elements'] as $eName => $attrs) {
                if (!isset($xvalue[$eName])) {
                    if (isset($attrs['default'])) {
                        $xvalue[$eName] = $attrs['default'];
                        $this->debug('use default value of ' . $xvalue[$eName] . ' for element ' . $eName);
                    }
                }
                // if user took advantage of a minOccurs=0, then only serialize named parameters
                if (isset($optionals) && !isset($xvalue[$eName]) && (!isset($attrs['nillable']) || 'true' !== $attrs['nillable'])) {
                    if (isset($attrs['minOccurs']) && '0' !== $attrs['minOccurs']) {
                        $this->debug("apparent error: no value provided for element $eName with minOccurs=" . $attrs['minOccurs']);
                    }
                    // do nothing
                    $this->debug("no value provided for complexType element $eName and element is not nillable, so serialize nothing");
                } else {
                    // get value
                    $v = null;
                    if (isset($xvalue[$eName])) {
                        $v = $xvalue[$eName];
                    }
                    $unqualified = false;
                    if (isset($attrs['form'])) {
                        $unqualified = ('unqualified' === $attrs['form']);
                    }
                    if (isset($attrs['maxOccurs']) && ('unbounded' === $attrs['maxOccurs'] || $attrs['maxOccurs'] > 1) && isset($v) && is_array($v) && 'arraySimple' === $this->isArraySimpleOrStruct($v)) {
                        $vv = $v;
                        foreach ($vv as $k => $v) {
                            if (isset($attrs['type']) || isset($attrs['ref'])) {
                                // serialize schema-defined type
                                $xml .= $this->serializeType($eName, isset($attrs['type']) ? $attrs['type'] : $attrs['ref'], $v, $use, $encodingStyle, $unqualified);
                            } else {
                                // serialize generic type (can this ever really happen?)
                                $this->debug("calling serialize_val() for $v, $eName, false, false, false, false, $use");
                                $xml .= $this->serialize_val($v, $eName, false, false, false, false, $use);
                            }
                        }
                    } else {
                        if (null === $v && isset($attrs['minOccurs']) && '0' === $attrs['minOccurs']) {
                            // do nothing
                        } elseif (null === $v && isset($attrs['nillable']) && 'true' === $attrs['nillable']) {
                            // TODO: serialize a nil correctly, but for now serialize schema-defined type
                            $xml .= $this->serializeType($eName, isset($attrs['type']) ? $attrs['type'] : $attrs['ref'], $v, $use, $encodingStyle, $unqualified);
                        } elseif (isset($attrs['type']) || isset($attrs['ref'])) {
                            // serialize schema-defined type
                            $xml .= $this->serializeType($eName, isset($attrs['type']) ? $attrs['type'] : $attrs['ref'], $v, $use, $encodingStyle, $unqualified);
                        } else {
                            // serialize generic type (can this ever really happen?)
                            $this->debug("calling serialize_val() for $v, $eName, false, false, false, false, $use");
                            $xml .= $this->serialize_val($v, $eName, false, false, false, false, $use);
                        }
                    }
                }
            }
        } else {
            $this->debug("no elements to serialize for XML Schema type $ns:$uqType");
        }

        return $xml;
    }

    /**
     * Adds an XML Schema complex type to the WSDL types
     *
     * @param string $name
     * @param string $typeClass       (complexType|simpleType|attribute)
     * @param string $phpType         currently supported are array and struct (php assoc array)
     * @param string $compositor      (all|sequence|choice)
     * @param string $restrictionBase namespace:name (http://schemas.xmlsoap.org/soap/encoding/:Array)
     * @param array  $elements        e.g. array ( name => array(name=>'',type=>'') )
     * @param array  $attrs           e.g. array(array('ref'=>'SOAP-ENC:arrayType','Wsdl:arrayType'=>'xsd:string[]'))
     * @param string $arrayType       as namespace:name (xsd:string)
     * @see    Nusoap_xmlschema
     */
    public function addComplexType($name, $typeClass = 'complexType', $phpType = 'array', $compositor = '', $restrictionBase = '', $elements = [], $attrs = [], $arrayType = '')
    {
        if (is_array($elements) && count($elements) > 0) {
            $eElements = [];
            foreach ($elements as $n => $e) {
                // expand each element
                $ee = [];
                foreach ($e as $k => $v) {
                    $k      = mb_strpos($k, ':') ? $this->expandQname($k) : $k;
                    $v      = mb_strpos($v, ':') ? $this->expandQname($v) : $v;
                    $ee[$k] = $v;
                }
                $eElements[$n] = $ee;
            }
            $elements = $eElements;
        }

        if (is_array($attrs) && count($attrs) > 0) {
            foreach ($attrs as $n => $a) {
                // expand each attribute
                foreach ($a as $k => $v) {
                    $k      = mb_strpos($k, ':') ? $this->expandQname($k) : $k;
                    $v      = mb_strpos($v, ':') ? $this->expandQname($v) : $v;
                    $aa[$k] = $v;
                }
                $eAttrs[$n] = $aa;

The variable $aa does not seem to be defined for all execution paths leading up to this point.

            }
            $attrs = $eAttrs;

The variable $eAttrs seems to be defined by a foreach iteration on line 6410. Are you sure the iterator is never empty, otherwise this variable is not defined?

        }

        $restrictionBase = mb_strpos($restrictionBase, ':') ? $this->expandQname($restrictionBase) : $restrictionBase;
        $arrayType       = mb_strpos($arrayType, ':') ? $this->expandQname($arrayType) : $arrayType;
        $typens          = isset($this->namespaces['types']) ? $this->namespaces['types'] : $this->namespaces['tns'];
        $this->schemas[$typens][0]->addComplexType($name, $typeClass, $phpType, $compositor, $restrictionBase, $elements, $attrs, $arrayType);
    }

    /**
     * Adds an XML Schema simple type to the WSDL types
     *
     * @param string $name
     * @param string $restrictionBase namespace:name (http://schemas.xmlsoap.org/soap/encoding/:Array)
     * @param string $typeClass       (should always be simpleType)
     * @param string $phpType         (should always be scalar)
     * @param array  $enumeration     array of values
     * @see    Nusoap_xmlschema
     */
    public function addSimpleType($name, $restrictionBase = '', $typeClass = 'simpleType', $phpType = 'scalar', $enumeration = [])
    {
        $restrictionBase = mb_strpos($restrictionBase, ':') ? $this->expandQname($restrictionBase) : $restrictionBase;
        $typens          = isset($this->namespaces['types']) ? $this->namespaces['types'] : $this->namespaces['tns'];
        $this->schemas[$typens][0]->addSimpleType($name, $restrictionBase, $typeClass, $phpType, $enumeration);
    }

    /**
     * Adds an element to the WSDL types
     *
     * @param array $attrs attributes that must include name and type
     * @see    Nusoap_xmlschema
     */
    public function addElement($attrs)
    {
        $typens = isset($this->namespaces['types']) ? $this->namespaces['types'] : $this->namespaces['tns'];
        $this->schemas[$typens][0]->addElement($attrs);
    }

    /**
     * Register an operation with the server
     *
     * @param string      $name          operation (method) name
     * @param bool|array  $in            assoc array of input values: key = param name, value = param type
     * @param bool|array  $out           assoc array of output values: key = param name, value = param type
     * @param bool|string $namespace     optional The namespace for the operation
     * @param bool|string $soapaction    optional The soapaction for the operation
     * @param string      $style         (rpc|document) optional The style for the operation Note: when 'document' is specified, parameter and return wrappers are created for you automatically
     * @param string      $use           (encoded|literal) optional The use for the parameters (cannot mix right now)
     * @param string      $documentation optional The description to include in the WSDL
     * @param string      $encodingStyle optional (usually 'http://schemas.xmlsoap.org/soap/encoding/' for encoded)
     * @return bool
     */
    public function addOperation($name, $in = false, $out = false, $namespace = false, $soapaction = false, $style = 'rpc', $use = 'encoded', $documentation = '', $encodingStyle = '')
    {
        if ('encoded' === $use && '' === $encodingStyle) {
            $encodingStyle = 'http://schemas.xmlsoap.org/soap/encoding/';
        }

        if ('document' === $style) {
            $elements = [];
            foreach ($in as $n => $t) {
                $elements[$n] = ['name' => $n, 'type' => $t, 'form' => 'unqualified'];
            }
            $this->addComplexType($name . 'RequestType', 'complexType', 'struct', 'all', '', $elements);
            $this->addElement(['name' => $name, 'type' => $name . 'RequestType']);
            $in       = ['parameters' => 'tns:' . $name . '^'];
            $elements = [];
            foreach ($out as $n => $t) {
                $elements[$n] = ['name' => $n, 'type' => $t, 'form' => 'unqualified'];
            }
            $this->addComplexType($name . 'ResponseType', 'complexType', 'struct', 'all', '', $elements);
            $this->addElement(['name' => $name . 'Response', 'type' => $name . 'ResponseType', 'form' => 'qualified']);
            $out = ['parameters' => 'tns:' . $name . 'Response' . '^'];
        }

        // get binding
        $this->bindings[$this->serviceName . 'Binding']['operations'][$name] = [
            'name'          => $name,
            'binding'       => $this->serviceName . 'Binding',
            'endpoint'      => $this->endpoint,
            'soapAction'    => $soapaction,
            'style'         => $style,
            'input'         => [
                'use'           => $use,
                'namespace'     => $namespace,
                'encodingStyle' => $encodingStyle,
                'message'       => $name . 'Request',
                'parts'         => $in,
            ],
            'output'        => [
                'use'           => $use,
                'namespace'     => $namespace,
                'encodingStyle' => $encodingStyle,
                'message'       => $name . 'Response',
                'parts'         => $out,
            ],
            'namespace'     => $namespace,
            'transport'     => 'http://schemas.xmlsoap.org/soap/http',
            'documentation' => $documentation,
        ];
        // add portTypes
        // add messages
        if ($in) {
            foreach ($in as $pName => $pType) {
                if (mb_strpos($pType, ':')) {
                    $pType = $this->getNamespaceFromPrefix($this->getPrefix($pType)) . ':' . $this->getLocalPart($pType);
                }
                $this->messages[$name . 'Request'][$pName] = $pType;
            }
        } else {
            $this->messages[$name . 'Request'] = '0';
        }
        if ($out) {
            foreach ($out as $pName => $pType) {
                if (mb_strpos($pType, ':')) {
                    $pType = $this->getNamespaceFromPrefix($this->getPrefix($pType)) . ':' . $this->getLocalPart($pType);
                }
                $this->messages[$name . 'Response'][$pName] = $pType;
            }
        } else {
            $this->messages[$name . 'Response'] = '0';
        }

        return true;
    }
}

/**
 * Nusoap_parser class parses SOAP XML messages into native PHP values
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @author   Scott Nichol <snichol@users.sourceforge.net>
 */
class Nusoap_parser extends Nusoap_base
{
    public $xml                   = '';
    public $xml_encoding          = '';
    public $method                = '';
    public $root_struct           = '';
    public $root_struct_name      = '';
    public $root_struct_namespace = '';
    public $root_header           = '';
    public $document              = '';            // incoming SOAP body (text)
    // determines where in the message we are (envelope,header,body,method)
    public $status            = '';
    public $position          = 0;
    public $depth             = 0;
    public $default_namespace = '';
    //    public $namespaces = []; //Field 'namespaces' is already defined in \Nusoap_base
    public $message         = [];
    public $parent          = '';
    public $fault           = false;
    public $fault_code      = '';
    public $fault_str       = '';
    public $fault_detail    = '';
    public $depth_array     = [];
    public $debug_flag      = true;
    public $soapresponse;    // parsed SOAP Body
    public $soapheader;        // parsed SOAP Header
    public $responseHeaders = '';    // incoming SOAP headers (text)
    public $body_position   = 0;
    // for multiref parsing:
    // array of id => pos
    public $ids = [];
    // array of id => hrefs => pos
    public $multirefs = [];
    // toggle for auto-decoding element content
    public $decode_utf8 = true;

    /**
     * Constructor that actually does the parsing
     *
     * @param    string       $xml         SOAP message
     * @param    string       $encoding    character encoding scheme of message
     * @param    string|array $method      method for which XML is parsed (unused?)
     * @param    bool|string  $decode_utf8 whether to decode UTF-8 to ISO-8859-1
     */
    public function __construct($xml, $encoding = 'UTF-8', $method = '', $decode_utf8 = true)
    {
        parent::__construct();
        $this->xml          = $xml;
        $this->xml_encoding = $encoding;
        $this->method       = $method;
        $this->decode_utf8  = $decode_utf8;
        // Check whether content has been read.
        if (!empty($xml)) {
            // Check XML encoding
            $pos_xml = mb_strpos($xml, '<?xml');
            if (false !== $pos_xml) {
                $xml_decl = mb_substr($xml, $pos_xml, mb_strpos($xml, '?>', $pos_xml + 2) - $pos_xml + 1);
                if (preg_match("/encoding=[\"']([^\"']*)[\"']/", $xml_decl, $res)) {
                    $xml_encoding = $res[1];
                    if (mb_strtoupper($xml_encoding) !== $encoding) {
                        $err = "Charset from HTTP Content-Type '" . $encoding . "' does not match encoding from XML declaration '" . $xml_encoding . "'";
                        $this->debug($err);
                        if ('ISO-8859-1' !== $encoding || 'UTF-8' !== mb_strtoupper($xml_encoding)) {
                            $this->setError($err);

                            return;
                        }
                        // when HTTP says ISO-8859-1 (the default) and XML says UTF-8 (the typical), assume the other endpoint is just sloppy and proceed
                    } else {
                        $this->debug('Charset from HTTP Content-Type matches encoding from XML declaration');
                    }
                } else {
                    $this->debug('No encoding specified in XML declaration');
                }
            } else {
                $this->debug('No XML declaration');
            }
            $this->debug('Entering Nusoap_parser(), length=' . mb_strlen($xml) . ', encoding=' . $encoding);
            // Create an XML parser - why not xml_parser_create_ns?
            $this->parser = xml_parser_create($this->xml_encoding);

The property parser does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

            // Set the options for parsing the XML data.
            //xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
            xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
            xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, $this->xml_encoding);
            // Set the object for the parser.
            xml_set_object($this->parser, $this);
            // Set the element handlers for the parser.
            xml_set_element_handler($this->parser, 'start_element', 'end_element');
            xml_set_character_data_handler($this->parser, 'character_data');
            // Parse the XML file.
            if (!xml_parse($this->parser, $xml, true)) {
                // Display an error message.
                $err = sprintf('XML error parsing SOAP payload on line %d: %s', xml_get_current_line_number($this->parser), xml_error_string(xml_get_error_code($this->parser)));
                $this->debug($err);
                $this->debug("XML payload:\n" . $xml);
                $this->setError($err);
            } else {
                $this->debug('in Nusoap_parser ctor, message:');
                $this->appendDebug($this->varDump($this->message));
                $this->debug('parsed successfully, found root struct: ' . $this->root_struct . ' of name ' . $this->root_struct_name);
                // get final value
                $this->soapresponse = $this->message[$this->root_struct]['result'];
                // get header value
                if ('' !== $this->root_header && isset($this->message[$this->root_header]['result'])) {
                    $this->soapheader = $this->message[$this->root_header]['result'];
                }
                // resolve hrefs/ids
                if (is_array($this->multirefs) && count($this->multirefs) > 0) {
                    foreach ($this->multirefs as $id => $hrefs) {
                        $this->debug('resolving multirefs for id: ' . $id);
                        $idVal = $this->buildVal($this->ids[$id]);
                        if (is_array($idVal) && isset($idVal['!id'])) {
                            unset($idVal['!id']);
                        }
                        foreach ($hrefs as $refPos => $ref) {
                            $this->debug('resolving href at pos ' . $refPos);
                            $this->multirefs[$id][$refPos] = $idVal;
                        }
                    }
                }
            }
            xml_parser_free($this->parser);
            unset($this->parser);
        } else {
            $this->debug('xml was empty, didn\'t parse!');
            $this->setError('xml was empty, didn\'t parse!');
        }
    }

    /**
     * Start-element handler
     *
     * @param    resource $parser XML parser object
     * @param    string   $name   element name
     * @param    array    $attrs  associative array of attributes
     */
    private function start_element($parser, $name, $attrs)

The method start_element() is not used, and could be removed.

The parameter $parser is not used and could be removed.

    {
        // position in a total number of elements, starting from 0
        // update class level pos
        $pos = $this->position++;
        // and set mine
        $this->message[$pos] = ['pos' => $pos, 'children' => '', 'cdata' => ''];
        // depth = how many levels removed from root?
        // set mine as current global depth and increment global depth value
        $this->message[$pos]['depth'] = $this->depth++;
        // else add self as child to whoever the current parent is
        if (0 !== $pos) {
            $this->message[$this->parent]['children'] .= '|' . $pos;
        }
        // set my parent
        $this->message[$pos]['parent'] = $this->parent;
        // set self as current parent
        $this->parent = $pos;
        // set self as current value for this depth
        $this->depth_array[$this->depth] = $pos;
        // get element prefix
        if (mb_strpos($name, ':')) {
            // get ns prefix
            $prefix = mb_substr($name, 0, mb_strpos($name, ':'));
            // get unqualified name
            $name = mb_substr(mb_strstr($name, ':'), 1);
        }
        // set status
        if ('Envelope' === $name && '' === $this->status) {
            $this->status = 'envelope';
        } elseif ('Header' === $name && 'envelope' === $this->status) {
            $this->root_header = $pos;
            $this->status      = 'header';
        } elseif ('Body' === $name && 'envelope' === $this->status) {
            $this->status        = 'body';
            $this->body_position = $pos;
        // set method
        } elseif ('body' === $this->status && $pos === ($this->body_position + 1)) {
            $this->status                = 'method';
            $this->root_struct_name      = $name;
            $this->root_struct           = $pos;
            $this->message[$pos]['type'] = 'struct';
            $this->debug("found root struct $this->root_struct_name, pos $this->root_struct");
        }
        // set my status
        $this->message[$pos]['status'] = $this->status;
        // set name
        $this->message[$pos]['name'] = htmlspecialchars($name);
        // set attrs
        $this->message[$pos]['attrs'] = $attrs;
        // loop through atts, logging ns and type declarations
        $attstr = '';
        foreach ($attrs as $key => $value) {
            $key_prefix    = $this->getPrefix($key);
            $key_localpart = $this->getLocalPart($key);
            // if ns declarations, add to class level array of valid namespaces
            if ('xmlns' === $key_prefix) {
                if (preg_match('/^http:\/\/www.w3.org\/[0-9]{4}\/XMLSchema$/', $value)) {
                    $this->XMLSchemaVersion  = $value;
                    $this->namespaces['xsd'] = $this->XMLSchemaVersion;
                    $this->namespaces['xsi'] = $this->XMLSchemaVersion . '-instance';
                }
                $this->namespaces[$key_localpart] = $value;
                // set method namespace
                if ($name === $this->root_struct_name) {
                    $this->methodNamespace = $value;

The property methodNamespace does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                }
                // if it's a type declaration, set type
            } elseif ('type' === $key_localpart) {
                if (isset($this->message[$pos]['type']) && 'array' === $this->message[$pos]['type']) {
                    // do nothing: already processed arrayType
                } else {
                    $value_prefix                      = $this->getPrefix($value);
                    $value_localpart                   = $this->getLocalPart($value);
                    $this->message[$pos]['type']       = $value_localpart;
                    $this->message[$pos]['typePrefix'] = $value_prefix;
                    if (isset($this->namespaces[$value_prefix])) {
                        $this->message[$pos]['type_namespace'] = $this->namespaces[$value_prefix];
                    } elseif (isset($attrs['xmlns:' . $value_prefix])) {

Are you sure $value_prefix of type false|string can be used in concatenation?

                        $this->message[$pos]['type_namespace'] = $attrs['xmlns:' . $value_prefix];
                    }
                    // should do something here with the namespace of specified type?
                }
            } elseif ('arrayType' === $key_localpart) {
                $this->message[$pos]['type'] = 'array';
                /* do arrayType ereg here
                [1]    arrayTypeValue    ::=    atype asize
                [2]    atype    ::=    QName rank*
                [3]    rank    ::=    '[' (',')* ']'
                [4]    asize    ::=    '[' length~ ']'
                [5]    length    ::=    nextDimension* Digit+
                [6]    nextDimension    ::=    Digit+ ','
                */
                $expr = '/([A-Za-z0-9_]+):([A-Za-z]+[A-Za-z0-9_]+)\[([0-9]+),?([0-9]*)\]/';
                if (preg_match($expr, $value, $regs)) {
                    $this->message[$pos]['typePrefix']      = $regs[1];
                    $this->message[$pos]['arrayTypePrefix'] = $regs[1];
                    if (isset($this->namespaces[$regs[1]])) {
                        $this->message[$pos]['arrayTypeNamespace'] = $this->namespaces[$regs[1]];
                    } elseif (isset($attrs['xmlns:' . $regs[1]])) {
                        $this->message[$pos]['arrayTypeNamespace'] = $attrs['xmlns:' . $regs[1]];
                    }
                    $this->message[$pos]['arrayType'] = $regs[2];
                    $this->message[$pos]['arraySize'] = $regs[3];
                    $this->message[$pos]['arrayCols'] = $regs[4];
                }
                // specifies nil value (or not)
            } elseif ('nil' === $key_localpart) {
                $this->message[$pos]['nil'] = ('true' === $value || '1' === $value);
            // some other attribute
            } elseif ('href' !== $key && 'xmlns' !== $key && 'encodingStyle' !== $key_localpart && 'root' !== $key_localpart) {
                $this->message[$pos]['xattrs']['!' . $key] = $value;
            }

            if ('xmlns' === $key) {
                $this->default_namespace = $value;
            }
            // log id
            if ('id' === $key) {
                $this->ids[$value] = $pos;
            }
            // root
            if ('root' === $key_localpart && 1 === $value) {
                $this->status           = 'method';
                $this->root_struct_name = $name;
                $this->root_struct      = $pos;
                $this->debug("found root struct $this->root_struct_name, pos $pos");
            }
            // for doclit
            $attstr .= " $key=\"$value\"";
        }
        // get namespace - must be done after namespace atts are processed
        if (isset($prefix)) {
            $this->message[$pos]['namespace'] = $this->namespaces[$prefix];
            $this->default_namespace          = $this->namespaces[$prefix];
        } else {
            $this->message[$pos]['namespace'] = $this->default_namespace;
        }
        if ('header' === $this->status) {
            if ($this->root_header !== $pos) {

The condition $this->root_header !== $pos is always true.

                $this->responseHeaders .= '<' . (isset($prefix) ? $prefix . ':' : '') . "$name$attstr>";
            }
        } elseif ('' !== $this->root_struct_name) {
            $this->document .= '<' . (isset($prefix) ? $prefix . ':' : '') . "$name$attstr>";
        }
    }

    /**
     * End-element handler
     *
     * @param    resource $parser XML parser object
     * @param    string   $name   element name
     */
    private function end_element($parser, $name)

The method end_element() is not used, and could be removed.

The parameter $parser is not used and could be removed.

    {
        // position of current element is equal to the last value left in depth_array for my depth
        $pos = $this->depth_array[$this->depth--];
        // get element prefix
        if (mb_strpos($name, ':')) {
            // get ns prefix
            $prefix = mb_substr($name, 0, mb_strpos($name, ':'));
            // get unqualified name
            $name = mb_substr(mb_strstr($name, ':'), 1);
        }

        // build to native type
        if (isset($this->body_position) && $pos > $this->body_position) {
            // deal w/ multirefs
            if (isset($this->message[$pos]['attrs']['href'])) {
                // get id
                $id = mb_substr($this->message[$pos]['attrs']['href'], 1);
                // add placeholder to href array
                $this->multirefs[$id][$pos] = 'placeholder';
                // add set a reference to it as the result value
                $this->message[$pos]['result'] = $this->multirefs[$id][$pos];
            // build complexType values
            } elseif ('' !== $this->message[$pos]['children']) {
                // if result has already been generated (struct/array)
                if (!isset($this->message[$pos]['result'])) {
                    $this->message[$pos]['result'] = $this->buildVal($pos);
                }
                // build complexType values of attributes and possibly simpleContent
            } elseif (isset($this->message[$pos]['xattrs'])) {
                if (!empty($this->message[$pos]['nil'])) {
                    $this->message[$pos]['xattrs']['!'] = null;
                } elseif (isset($this->message[$pos]['cdata']) && '' !== trim($this->message[$pos]['cdata'])) {
                    if (isset($this->message[$pos]['type'])) {
                        $this->message[$pos]['xattrs']['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
                    } else {
                        $parent = $this->message[$pos]['parent'];
                        if (isset($this->message[$parent]['type']) && ('array' === $this->message[$parent]['type']) && isset($this->message[$parent]['arrayType'])) {
                            $this->message[$pos]['xattrs']['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
                        } else {
                            $this->message[$pos]['xattrs']['!'] = $this->message[$pos]['cdata'];
                        }
                    }
                }
                $this->message[$pos]['result'] = $this->message[$pos]['xattrs'];
            // set value of simpleType (or nil complexType)
            } else {
                //$this->debug('adding data for scalar value '.$this->message[$pos]['name'].' of value '.$this->message[$pos]['cdata']);
                if (!empty($this->message[$pos]['nil'])) {
                    $this->message[$pos]['xattrs']['!'] = null;
                } elseif (isset($this->message[$pos]['type'])) {
                    $this->message[$pos]['result'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
                } else {
                    $parent = $this->message[$pos]['parent'];
                    if (isset($this->message[$parent]['type']) && ('array' === $this->message[$parent]['type']) && isset($this->message[$parent]['arrayType'])) {
                        $this->message[$pos]['result'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
                    } else {
                        $this->message[$pos]['result'] = $this->message[$pos]['cdata'];
                    }
                }

                /* add value to parent's result, if parent is struct/array
                $parent = $this->message[$pos]['parent'];
                if($this->message[$parent]['type'] != 'map'){
                    if(strtolower($this->message[$parent]['type']) == 'array'){
                        $this->message[$parent]['result'][] = $this->message[$pos]['result'];
                    } else {
                        $this->message[$parent]['result'][$this->message[$pos]['name']] = $this->message[$pos]['result'];
                    }
                }
                */
            }
        }

        // for doclit
        if ('header' === $this->status) {
            if ($this->root_header !== $pos) {
                $this->responseHeaders .= '</' . (isset($prefix) ? $prefix . ':' : '') . "$name>";
            }
        } elseif ($pos >= $this->root_struct) {
            $this->document .= '</' . (isset($prefix) ? $prefix . ':' : '') . "$name>";
        }
        // switch status
        if ($pos === $this->root_struct) {
            $this->status                = 'body';
            $this->root_struct_namespace = $this->message[$pos]['namespace'];
        } elseif ($pos === $this->root_header) {
            $this->status = 'envelope';
        } elseif ('Body' === $name && 'body' === $this->status) {
            $this->status = 'envelope';
        } elseif ('Header' === $name && 'header' === $this->status) {
            // will never happen
            $this->status = 'envelope';
        } elseif ('Envelope' === $name && 'envelope' === $this->status) {
            $this->status = '';
        }
        // set parent back to my parent
        $this->parent = $this->message[$pos]['parent'];
    }

    /**
     * Element content handler
     *
     * @param    resource $parser XML parser object
     * @param    string   $data   element content
     */
    private function character_data($parser, $data)

The parameter $parser is not used and could be removed.

The method character_data() is not used, and could be removed.

    {
        $pos = $this->depth_array[$this->depth];
        if ('UTF-8' === $this->xml_encoding) {
            // TODO: add an option to disable this for folks who want
            // raw UTF-8 that, e.g., might not map to iso-8859-1
            // TODO: this can also be handled with xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, "ISO-8859-1");
            if ($this->decode_utf8) {
                $data = utf8_decode($data);
            }
        }
        $this->message[$pos]['cdata'] .= $data;
        // for doclit
        if ('header' === $this->status) {
            $this->responseHeaders .= $data;
        } else {
            $this->document .= $data;
        }
    }

    /**
     * Get the parsed message (SOAP Body)
     *
     * @return    mixed
     * @deprecated    use get_soapbody instead
     */
    public function get_response()
    {
        return $this->soapresponse;
    }

    /**
     * Get the parsed SOAP Body (null if there was none)
     *
     * @return    mixed
     */
    public function get_soapbody()
    {
        return $this->soapresponse;
    }

    /**
     * Get the parsed SOAP Header (null if there was none)
     *
     * @return    mixed
     */
    public function get_soapheader()
    {
        return $this->soapheader;
    }

    /**
     * Get the unparsed SOAP Header
     *
     * @return    string XML or empty if no Header
     */
    public function getHeaders()
    {
        return $this->responseHeaders;
    }

    /**
     * Decodes simple types into PHP variables
     *
     * @param    string $value  value to decode
     * @param    string $type   XML type to decode
     * @param    string $typens XML type namespace to decode
     * @return    mixed PHP value
     */
    private function decodeSimple($value, $type, $typens)

The parameter $typens is not used and could be removed.

    {
        // TODO: use the namespace!
        if (!isset($type) || 'string' === $type || 'long' === $type || 'unsignedLong' === $type) {
            return (string)$value;
        }
        if ('int' === $type || 'integer' === $type || 'short' === $type || 'byte' === $type) {
            return (int)$value;
        }
        if ('float' === $type || 'double' === $type || 'decimal' === $type) {
            return (float)$value;
        }
        if ('boolean' === $type) {
            if ('false' === mb_strtolower($value) || 'f' === mb_strtolower($value)) {
                return false;
            }

            return (bool)$value;
        }
        if ('base64' === $type || 'base64Binary' === $type) {
            $this->debug('Decode base64 value');

            return base64_decode($value, true);
        }
        // obscure numeric types
        if ('nonPositiveInteger' === $type || 'negativeInteger' === $type || 'nonNegativeInteger' === $type || 'positiveInteger' === $type || 'unsignedInt' === $type || 'unsignedShort' === $type || 'unsignedByte' === $type) {
            return (int)$value;
        }
        // bogus: parser treats array with no elements as a simple type
        if ('array' === $type) {
            return [];
        }
        // everything else
        return (string)$value;
    }

    /**
     * Builds response structures for compound values (arrays/structs)
     * and scalars
     *
     * @param int $pos position in node tree
     * @return    mixed    PHP value
     */
    private function buildVal($pos)
    {
        if (!isset($this->message[$pos]['type'])) {
            $this->message[$pos]['type'] = '';
        }
        $this->debug('in buildVal() for ' . $this->message[$pos]['name'] . "(pos $pos) of type " . $this->message[$pos]['type']);
        // if there are children...
        if ('' !== $this->message[$pos]['children']) {
            $this->debug('in buildVal, there are children');
            $children = explode('|', $this->message[$pos]['children']);
            array_shift($children); // knock off empty
            // md array
            if (isset($this->message[$pos]['arrayCols']) && '' !== $this->message[$pos]['arrayCols']) {
                $r = 0; // rowcount
                $c = 0; // colcount
                foreach ($children as $child_pos) {
                    $this->debug("in buildVal, got an MD array element: $r, $c");
                    $params[$r][] = $this->message[$child_pos]['result'];
                    ++$c;
                    if ($c === $this->message[$pos]['arrayCols']) {
                        $c = 0;
                        ++$r;
                    }
                }
                // array
            } elseif ('array' === $this->message[$pos]['type'] || 'Array' === $this->message[$pos]['type']) {
                $this->debug('in buildVal, adding array ' . $this->message[$pos]['name']);
                foreach ($children as $child_pos) {
                    $params[] = &$this->message[$child_pos]['result'];
                }
                // apache Map type: java hashtable
            } elseif ('Map' === $this->message[$pos]['type'] && 'http://xml.apache.org/xml-soap' === $this->message[$pos]['type_namespace']) {
                $this->debug('in buildVal, Java Map ' . $this->message[$pos]['name']);
                foreach ($children as $child_pos) {
                    $kv                                       = explode('|', $this->message[$child_pos]['children']);
                    $params[$this->message[$kv[1]]['result']] = &$this->message[$kv[2]]['result'];
                }
                // generic compound type
                //} elseif($this->message[$pos]['type'] == 'SOAPStruct' || $this->message[$pos]['type'] == 'struct') {
            } else {
                // Apache Vector type: treat as an array
                $this->debug('in buildVal, adding Java Vector or generic compound type ' . $this->message[$pos]['name']);
                if ('Vector' === $this->message[$pos]['type'] && 'http://xml.apache.org/xml-soap' === $this->message[$pos]['type_namespace']) {
                    $notstruct = 1;
                } else {
                    $notstruct = 0;
                }

                foreach ($children as $child_pos) {
                    if ($notstruct) {
                        $params[] = &$this->message[$child_pos]['result'];
                    } else {
                        if (isset($params[$this->message[$child_pos]['name']])) {
                            // de-serialize repeated element name into an array
                            if ((!is_array($params[$this->message[$child_pos]['name']])) || !isset($params[$this->message[$child_pos]['name']][0])) {

The variable $params seems to be defined later in this foreach loop on line 7109. Are you sure it is defined here?

                                $params[$this->message[$child_pos]['name']] = [$params[$this->message[$child_pos]['name']]];
                            }
                            $params[$this->message[$child_pos]['name']][] = &$this->message[$child_pos]['result'];
                        } else {
                            $params[$this->message[$child_pos]['name']] = &$this->message[$child_pos]['result'];
                        }
                    }
                }
            }
            if (isset($this->message[$pos]['xattrs'])) {
                $this->debug('in buildVal, handling attributes');
                foreach ($this->message[$pos]['xattrs'] as $n => $v) {
                    $params[$n] = $v;
                }
            }
            // handle simpleContent
            if (isset($this->message[$pos]['cdata']) && '' !== trim($this->message[$pos]['cdata'])) {
                $this->debug('in buildVal, handling simpleContent');
                if (isset($this->message[$pos]['type'])) {
                    $params['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
                } else {
                    $parent = $this->message[$pos]['parent'];
                    if (isset($this->message[$parent]['type']) && ('array' === $this->message[$parent]['type']) && isset($this->message[$parent]['arrayType'])) {
                        $params['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
                    } else {
                        $params['!'] = $this->message[$pos]['cdata'];
                    }
                }
            }
            $ret = is_array($params) ? $params : [];
            $this->debug('in buildVal, return:');
            $this->appendDebug($this->varDump($ret));

            return $ret;
        }

        $this->debug('in buildVal, no children, building scalar');
        $cdata = isset($this->message[$pos]['cdata']) ? $this->message[$pos]['cdata'] : '';
        if (isset($this->message[$pos]['type'])) {
            $ret = $this->decodeSimple($cdata, $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
            $this->debug("in buildVal, return: $ret");

            return $ret;
        }
        $parent = $this->message[$pos]['parent'];
        if (isset($this->message[$parent]['type']) && ('array' === $this->message[$parent]['type']) && isset($this->message[$parent]['arrayType'])) {
            $ret = $this->decodeSimple($cdata, $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
            $this->debug("in buildVal, return: $ret");

            return $ret;
        }
        $ret = $this->message[$pos]['cdata'];
        $this->debug("in buildVal, return: $ret");

        return $ret;
    }
}

/**
 * Backward compatibility
 */
class Soap_parser extends Nusoap_parser
{
}

/**
 * [nu]soapclient higher level class for easy usage.
 *
 * Usage:
 *
 * // instantiate client with server info
 * $soapclient = new Nusoap_client( string path [ ,mixed wsdl] );
 *
 * // call method, get results
 * echo $soapclient->call( string methodname [ ,array parameters] );
 *
 * // bye bye client
 * unset($soapclient);
 *
 * @author   Dietrich Ayala <dietrich@ganx4.com>
 * @author   Scott Nichol <snichol@users.sourceforge.net>
 */
class Nusoap_client extends Nusoap_base
{
    public $username             = '';                // Username for HTTP authentication
    public $password             = '';                // Password for HTTP authentication
    public $authtype             = '';                // Type of HTTP authentication
    public $certRequest          = [];        // Certificate for HTTP SSL authentication
    public $requestHeaders       = false;    // SOAP headers in request (text)
    public $responseHeaders      = '';        // SOAP headers from response (incomplete namespace resolution) (text)
    public $responseHeader;        // SOAP Header from response (parsed)
    public $document             = '';                // SOAP body response portion (incomplete namespace resolution) (text)
    public $endpoint;
    public $forceEndpoint        = '';        // overrides WSDL endpoint
    public $proxyhost            = '';
    public $proxyport            = '';
    public $proxyusername        = '';
    public $proxypassword        = '';
    public $portName             = '';                // port name to use in WSDL
    public $xml_encoding         = '';            // character set encoding of incoming (response) messages
    public $http_encoding        = false;
    public $timeout              = 0;                // HTTP connection timeout
    public $response_timeout     = 30;        // HTTP response timeout
    public $endpointType         = '';            // soap|wsdl, empty for WSDL initialization error
    public $persistentConnection = false;
    public $defaultRpcParams     = false;    // This is no longer used
    public $request              = '';                // HTTP request
    public $response             = '';                // HTTP response
    public $responseData         = '';            // SOAP payload of response
    public $cookies              = [];            // Cookies from response or for request
    public $decode_utf8          = true;        // toggles whether the parser decodes element content w/ utf8_decode()
    public $operations           = [];        // WSDL operations, empty for WSDL initialization error
    public $curl_options         = [];    // User-specified cURL options
    public $bindingType          = '';            // WSDL operation binding type
    public $use_curl             = false;            // whether to always try to use cURL

    /*
     * Fault related variables
     */
    /**
     * @var  string|bool $fault
     */
    public $fault;
    /**
     * @var  string $faultcode
     */
    public $faultcode;
    /**
     * @var string $faultstring
     */
    public $faultstring;
    /**
     * @var string $faultdetail
     */
    public $faultdetail;

    /**
     * Constructor
     *
     * @param    mixed       $endpoint         SOAP server or WSDL URL (string), or Wsdl instance (object)
     * @param    mixed       $wsdl             optional, set to 'Wsdl' or true if using WSDL
     * @param    bool|string $proxyhost        optional
     * @param    bool|string $proxyport        optional
     * @param    bool|string $proxyusername    optional
     * @param    bool|string $proxypassword    optional
     * @param int            $timeout          set the connection timeout
     * @param int            $response_timeout set the response timeout
     * @param    string      $portName         optional portName in WSDL document
     */
    public function __construct($endpoint, $wsdl = false, $proxyhost = false, $proxyport = false, $proxyusername = false, $proxypassword = false, $timeout = 0, $response_timeout = 30, $portName = '')
    {
        parent::__construct();
        $this->endpoint         = $endpoint;
        $this->proxyhost        = $proxyhost;
        $this->proxyport        = $proxyport;
        $this->proxyusername    = $proxyusername;
        $this->proxypassword    = $proxypassword;
        $this->timeout          = $timeout;
        $this->response_timeout = $response_timeout;
        $this->portName         = $portName;
        $this->debug("ctor wsdl=$wsdl timeout=$timeout response_timeout=$response_timeout");
        $this->appendDebug('endpoint=' . $this->varDump($endpoint));
        // make values
        if ($wsdl) {
            if (is_object($endpoint) && ('Wsdl' === get_class($endpoint))) {
                $this->wsdl     = $endpoint;

The property wsdl does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                $this->endpoint = $this->wsdl->wsdl;
                $this->wsdlFile = $this->endpoint;

The property wsdlFile does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

                $this->debug('existing Wsdl instance created from ' . $this->endpoint);
                $this->checkWSDL();
            } else {
                $this->wsdlFile = $this->endpoint;
                $this->wsdl     = null;
                $this->debug('will use lazy evaluation of Wsdl from ' . $this->endpoint);
            }
            $this->endpointType = 'Wsdl';
        } else {
            $this->debug("instantiate SOAP with endpoint at $endpoint");
            $this->endpointType = 'soap';
        }
    }

    /**
     * Calls method, returns PHP native type
     *
     * @param    string $operation  SOAP server URL or path
     * @param    mixed  $params     An array, associative or simple, of the parameters
     *                              for the method call, or a string that is the XML
     *                              for the call.  For rpc style, this call will
     *                              wrap the XML in a tag named after the method, as
     *                              well as the SOAP Envelope and Body.  For document
     *                              style, this will only wrap with the Envelope and Body.
     *                              IMPORTANT: when using an array with document style,
     *                              in which case there
     *                              is really one parameter, the root of the fragment
     *                              used in the call, which encloses what programmers
     *                              normally think of parameters.  A parameter array
     *                              *must* include the wrapper.
     * @param    string $namespace  optional method namespace (WSDL can override)
     * @param    string $soapAction optional SOAPAction value (WSDL can override)
     * @param    mixed  $headers    optional string of XML with SOAP header content, or array of soapval objects for SOAP headers, or associative array
     * @param    bool   $rpcParams  optional (no longer used)
     * @param    string $style      optional (rpc|document) the style to use when serializing parameters (WSDL can override)
     * @param    string $use        optional (encoded|literal) the use when serializing parameters (WSDL can override)
     * @return    mixed    response from SOAP call, normally an associative array mirroring the structure of the XML response, false for certain fatal errors
     */
    public function call($operation, $params = [], $namespace = 'http://tempuri.org', $soapAction = '', $headers = false, $rpcParams = null, $style = 'rpc', $use = 'encoded')
    {
        $this->operation = $operation;

The property operation does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

        $this->fault     = false;
        $this->setError('');
        $this->request      = '';
        $this->response     = '';
        $this->responseData = '';
        $this->faultstring  = '';
        $this->faultcode    = '';
        $this->opData       = [];

The property opData does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

        $this->debug("call: operation=$operation, namespace=$namespace, soapAction=$soapAction, rpcParams=$rpcParams, style=$style, use=$use, endpointType=$this->endpointType");
        $this->appendDebug('params=' . $this->varDump($params));
        $this->appendDebug('headers=' . $this->varDump($headers));
        if ($headers) {
            $this->requestHeaders = $headers;
        }
        if ('Wsdl' === $this->endpointType && null === $this->wsdl) {
            $this->loadWSDL();
            if ($this->getError()) {
                return false;
            }
        }
        // serialize parameters
        if ('Wsdl' === $this->endpointType && $opData = $this->getOperationData($operation)) {
            // use WSDL for operation
            $this->opData = $opData;
            $this->debug('found operation');
            $this->appendDebug('opData=' . $this->varDump($opData));
            if (isset($opData['soapAction'])) {
                $soapAction = $opData['soapAction'];
            }
            if (!$this->forceEndpoint) {
                $this->endpoint = $opData['endpoint'];
            } else {
                $this->endpoint = $this->forceEndpoint;
            }
            $namespace = isset($opData['input']['namespace']) ? $opData['input']['namespace'] : $namespace;
            $style     = $opData['style'];
            $use       = $opData['input']['use'];
            // add ns to ns array
            if ('' !== $namespace && !isset($this->wsdl->namespaces[$namespace])) {
                $nsPrefix                          = 'ns' . mt_rand(1000, 9999);
                $this->wsdl->namespaces[$nsPrefix] = $namespace;
            }
            $nsPrefix = $this->wsdl->getPrefixFromNamespace($namespace);
            // serialize payload
            if (is_string($params)) {
                $this->debug("serializing param string for WSDL operation $operation");
                $payload = $params;
            } elseif (is_array($params)) {
                $this->debug("serializing param array for WSDL operation $operation");
                $payload = $this->wsdl->serializeRPCParameters($operation, 'input', $params, $this->bindingType);
            } else {
                $this->debug('params must be array or string');
                $this->setError('params must be array or string');

                return false;
            }
            $usedNamespaces = $this->wsdl->usedNamespaces;
            $encodingStyle  = '';
            if (isset($opData['input']['encodingStyle'])) {
                $encodingStyle = $opData['input']['encodingStyle'];
            }
            $this->appendDebug($this->wsdl->getDebug());
            $this->wsdl->clearDebug();
            if (false !== ($errstr = $this->wsdl->getError())) {
                $this->debug('got wsdl error: ' . $errstr);
                $this->setError('wsdl error: ' . $errstr);

                return false;
            }
        } elseif ('Wsdl' === $this->endpointType) {
            // operation not in WSDL
            $this->appendDebug($this->wsdl->getDebug());
            $this->wsdl->clearDebug();
            $this->setError('operation ' . $operation . ' not present in WSDL.');
            $this->debug("operation '$operation' not present in WSDL.");

            return false;
        } else {
            // no WSDL
            //$this->namespaces['ns1'] = $namespace;
            $nsPrefix = 'ns' . mt_rand(1000, 9999);
            // serialize
            $payload = '';
            if (is_string($params)) {
                $this->debug("serializing param string for operation $operation");
                $payload = $params;
            } elseif (is_array($params)) {
                $this->debug("serializing param array for operation $operation");
                foreach ($params as $k => $v) {
                    $payload .= $this->serialize_val($v, $k, false, false, false, false, $use);
                }
            } else {
                $this->debug('params must be array or string');
                $this->setError('params must be array or string');

                return false;
            }
            $usedNamespaces = [];
            $encodingStyle  = '';
            if ('encoded' === $use) {
                $encodingStyle = 'http://schemas.xmlsoap.org/soap/encoding/';
            }
        }
        // wrap RPC calls with method element
        if ('rpc' === $style) {
            if ('literal' === $use) {
                $this->debug('wrapping RPC request with literal method element');
                if ($namespace) {
                    // http://www.ws-i.org/Profiles/BasicProfile-1.1-2004-08-24.html R2735 says rpc/literal accessor elements should not be in a namespace
                    $payload = "<$nsPrefix:$operation xmlns:$nsPrefix=\"$namespace\">" . $payload . "</$nsPrefix:$operation>";
                } else {
                    $payload = "<$operation>" . $payload . "</$operation>";
                }
            } else {
                $this->debug('wrapping RPC request with encoded method element');
                if ($namespace) {
                    $payload = "<$nsPrefix:$operation xmlns:$nsPrefix=\"$namespace\">" . $payload . "</$nsPrefix:$operation>";
                } else {
                    $payload = "<$operation>" . $payload . "</$operation>";
                }
            }
        }
        // serialize envelope
        $soapmsg = $this->serializeEnvelope($payload, $this->requestHeaders, $usedNamespaces, $style, $use, $encodingStyle);
        $this->debug("endpoint=$this->endpoint, soapAction=$soapAction, namespace=$namespace, style=$style, use=$use, encodingStyle=$encodingStyle");
        $this->debug('SOAP message length=' . mb_strlen($soapmsg) . ' contents (max 1000 bytes)=' . mb_substr($soapmsg, 0, 1000));
        // send
        $return = $this->send($this->getHTTPBody($soapmsg), $soapAction, $this->timeout, $this->response_timeout);
        if (false !== ($errstr = $this->getError())) {
            $this->debug('Error: ' . $errstr);

            return false;
        }
            $this->return = $return;

The property return does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

            $this->debug('sent message successfully and got a(n) ' . gettype($return));
            $this->appendDebug('return=' . $this->varDump($return));
            // fault?
            if (is_array($return) && isset($return['faultcode'])) {
                $this->debug('got fault');
                $this->setError($return['faultcode'] . ': ' . $return['faultstring']);
                $this->fault = true;
                foreach ($return as $k => $v) {
                    $this->$k = $v;
                    if (is_array($v)) {
                        $this->debug("$k = " . json_encode($v));
                    } else {
                        $this->debug("$k = $v<br>");
                    }
                }

                return $return;
            } elseif ('document' === $style) {
                // NOTE: if the response is defined to have multiple parts (i.e. unwrapped),
                // we are only going to return the first part here...sorry about that
                return $return;
        }
                // array of return values
                if (is_array($return)) {
                    // multiple 'out' parameters, which we return wrapped up
                    // in the array
                    if (is_array($return) && count($return) > 1) {
                        return $return;
                    }
                    // single 'out' parameter (normally the return value)
                    $return = array_shift($return);
                    $this->debug('return shifted value: ');
                    $this->appendDebug($this->varDump($return));

                    return $return;
                // nothing returned (ie, echoVoid)
        }

                    return '';
                }

    /**
     * Check WSDL passed as an instance or pulled from an endpoint
     */
    private function checkWSDL()
    {
        $this->appendDebug($this->wsdl->getDebug());
        $this->wsdl->clearDebug();
        $this->debug('checkWSDL');
        // catch errors
        if (false !== ($errstr = $this->wsdl->getError())) {
            $this->appendDebug($this->wsdl->getDebug());
            $this->wsdl->clearDebug();
            $this->debug('got wsdl error: ' . $errstr);
            $this->setError('wsdl error: ' . $errstr);
        } elseif (false !== ($this->operations = $this->wsdl->getOperations($this->portName, 'soap'))) {
            $this->appendDebug($this->wsdl->getDebug());
            $this->wsdl->clearDebug();
            $this->bindingType = 'soap';
            $this->debug('got ' . count($this->operations) . ' operations from Wsdl ' . $this->wsdlFile . ' for binding type ' . $this->bindingType);
        } elseif (false !== ($this->operations = $this->wsdl->getOperations($this->portName, 'soap12'))) {
            $this->appendDebug($this->wsdl->getDebug());
            $this->wsdl->clearDebug();
            $this->bindingType = 'soap12';
            $this->debug('got ' . count($this->operations) . ' operations from Wsdl ' . $this->wsdlFile . ' for binding type ' . $this->bindingType);
            $this->debug('**************** WARNING: SOAP 1.2 BINDING *****************');
        } else {
            $this->appendDebug($this->wsdl->getDebug());
            $this->wsdl->clearDebug();
            $this->debug('getOperations returned false');
            $this->setError('no operations defined in the WSDL document!');
        }
    }

    /**
     * Instantiate Wsdl object and parse Wsdl file
     */
    public function loadWSDL()
    {
        $this->debug('instantiating Wsdl class with doc: ' . $this->wsdlFile);
        $this->wsdl = new Wsdl('', $this->proxyhost, $this->proxyport, $this->proxyusername, $this->proxypassword, $this->timeout, $this->response_timeout, $this->curl_options, $this->use_curl);

The property wsdl does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

        $this->wsdl->setCredentials($this->username, $this->password, $this->authtype, $this->certRequest);
        $this->wsdl->fetchWSDL($this->wsdlFile);
        $this->checkWSDL();
    }

    /**
     * Get available data pertaining to an operation
     *
     * @param    string $operation operation name
     * @return   bool|array array of data pertaining to the operation
     */
    public function getOperationData($operation)
    {
        if ('Wsdl' === $this->endpointType && null === $this->wsdl) {
            $this->loadWSDL();
            if ($this->getError()) {
                return false;
            }
        }
        if (isset($this->operations[$operation])) {
            return $this->operations[$operation];
        }
        $this->debug("No data for operation: $operation");
    }

    /**
     * Send the SOAP message
     *
     * Note: if the operation has multiple return values
     * the return value of this method will be an array
     * of those values.
     *
     * @param    string $msg              a SOAPx4 soapmsg object
     * @param    string $soapaction       SOAPAction value
     * @param int       $timeout          set connection timeout in seconds
     * @param int       $response_timeout set response timeout in seconds
     * @return    mixed native PHP types.
     */
    private function send($msg, $soapaction = '', $timeout = 0, $response_timeout = 30)
    {
        $this->checkCookies();
        // detect transport
        switch (true) {

It seems like you are loosely comparing preg_match('/^http/', $this->endpoint) of type integer to the boolean true. If you are specifically checking for non-zero, consider using something more explicit like > 0 or !== 0 instead.

            // http(s)
            case preg_match('/^http/', $this->endpoint):
                $this->debug('transporting via HTTP');
                if (true === $this->persistentConnection && is_object($this->persistentConnection)) {

The condition is_object($this->persistentConnection) is always false.

                    $http = $this->persistentConnection;
                } else {
                    $http = new Soap_transport_http($this->endpoint, $this->curl_options, $this->use_curl);
                    if ($this->persistentConnection) {
                        $http->usePersistentConnection();
                    }
                }
                $http->setContentType($this->getHTTPContentType(), $this->getHTTPContentTypeCharset());
                $http->setSOAPAction($soapaction);
                if ($this->proxyhost && $this->proxyport) {
                    $http->setProxy($this->proxyhost, $this->proxyport, $this->proxyusername, $this->proxypassword);
                }
                if ('' !== $this->authtype) {
                    $http->setCredentials($this->username, $this->password, $this->authtype, [], $this->certRequest);
                }
                if ('' !== $this->http_encoding) {

The condition '' !== $this->http_encoding is always true.

                    $http->setEncoding($this->http_encoding);
                }
                $this->debug('sending message, length=' . mb_strlen($msg));
                if (preg_match('/^http:/', $this->endpoint)) {
                    //if(strpos($this->endpoint,'http:')){
                    $this->responseData = $http->send($msg, $timeout, $response_timeout, $this->cookies);
                } elseif (preg_match('/^https/', $this->endpoint)) {
                    //} elseif(strpos($this->endpoint,'https:')){
                    //if (PHP_VERSION == '4.3.0-dev') {
                    //$response = $http->send($msg,$timeout,$response_timeout);
                    //$this->request = $http->outgoing_payload;
                    //$this->response = $http->incoming_payload;
                    //} else
                    $this->responseData = $http->sendHTTPS($msg, $timeout, $response_timeout, $this->cookies);

The function Soap_transport_http::sendHTTPS() has been deprecated.

                } else {
                    $this->setError('no http/s in endpoint url');
                }
                $this->request  = $http->outgoing_payload;
                $this->response = $http->incoming_payload;
                $this->appendDebug($http->getDebug());
                $this->UpdateCookies($http->incoming_cookies);
                // save transport object if using persistent connections
                if ($this->persistentConnection) {
                    $http->clearDebug();
                    if (!is_object($this->persistentConnection)) {

The condition is_object($this->persistentConnection) is always false.

                        $this->persistentConnection = $http;
                    }
                }

                if (false !== ($err = $http->getError())) {
                    $this->setError('HTTP Error: ' . $err);

                    return false;
                } elseif ($this->getError()) {
                    return false;
                }
                $this->debug('got response, length=' . mb_strlen($this->responseData) . ' type=' . $http->incoming_headers['content-type']);

                return $this->parseResponse($http->incoming_headers, $this->responseData);
                break;

break is not strictly necessary here and could be removed.

            default:
                $this->setError('no transport found, or selected transport is not yet supported!');

                return false;
                break;
        }
    }

    /**
     * Processes SOAP message returned from server
     *
     * @param    array  $headers The HTTP headers
     * @param    string $data    unprocessed response data from server
     * @return    mixed    value of the message, decoded into a PHP type
     */
    private function parseResponse($headers, $data)
    {
        $this->debug('Entering parseResponse() for data of length ' . mb_strlen($data) . ' headers:');
        $this->appendDebug($this->varDump($headers));
        if (!isset($headers['content-type'])) {
            $this->setError('Response not of type text/xml (no content-type header)');

            return false;
        }
        if (false === mb_strpos($headers['content-type'], 'text/xml')) {
            $this->setError('Response not of type text/xml: ' . $headers['content-type']);

            return false;
        }
        if (mb_strpos($headers['content-type'], '=')) {
            $enc = str_replace('"', '', mb_substr(mb_strstr($headers['content-type'], '='), 1));
            $this->debug('Got response encoding: ' . $enc);
            $this->xml_encoding = 'US-ASCII';
            if (preg_match('/^(ISO-8859-1|US-ASCII|UTF-8)$/i', $enc)) {
                $this->xml_encoding = mb_strtoupper($enc);
            }
        } else {
            // should be US-ASCII for HTTP 1.0 or ISO-8859-1 for HTTP 1.1
            $this->xml_encoding = 'ISO-8859-1';
        }
        $this->debug('Use encoding: ' . $this->xml_encoding . ' when creating Nusoap_parser');
        $parser = new Nusoap_parser($data, $this->xml_encoding, $this->operations, $this->decode_utf8);
        // add parser debug data to our debug
        $this->appendDebug($parser->getDebug());
        // if parse errors
        if (false !== ($errstr = $parser->getError())) {
            $this->setError($errstr);
            // destroy the parser object
            unset($parser);

            return false;
        }
            // get SOAP headers
            $this->responseHeaders = $parser->getHeaders();
            // get SOAP headers
            $this->responseHeader = $parser->get_soapheader();
            // get decoded message
            $return = $parser->get_soapbody();
            // add document for doclit support
            $this->document = $parser->document;
            // destroy the parser object
            unset($parser);
            // return decode message
            return $return;
        }

    /**
     * Sets user-specified cURL options
     *
     * @param    mixed $option The cURL option (always integer?)
     * @param    mixed $value  The cURL option value
     */
    public function setCurlOption($option, $value)
    {
        $this->debug("setCurlOption option=$option, value=");
        $this->appendDebug($this->varDump($value));
        $this->curl_options[$option] = $value;
    }

    /**
     * Sets the SOAP endpoint, which can override WSDL
     *
     * @param    string $endpoint The endpoint URL to use, or empty string or false to prevent override
     */
    public function setEndpoint($endpoint)
    {
        $this->debug("setEndpoint(\"$endpoint\")");
        $this->forceEndpoint = $endpoint;
    }

    /**
     * Set the SOAP headers
     *
     * @param    mixed $headers String of XML with SOAP header content, or array of Soapval objects for SOAP headers
     */
    public function setHeaders($headers)
    {
        $this->debug('setHeaders headers=');
        $this->appendDebug($this->varDump($headers));
        $this->requestHeaders = $headers;
    }

    /**
     * Get the SOAP response headers (namespace resolution incomplete)
     *
     * @return    string
     */
    public function getHeaders()
    {
        return $this->responseHeaders;
    }

    /**
     * Get the SOAP response Header (parsed)
     *
     * @return    mixed
     */
    public function getHeader()
    {
        return $this->responseHeader;
    }

    /**
     * Set proxy info here
     *
     * @param    string $proxyhost
     * @param    string $proxyport
     * @param    string $proxyusername
     * @param    string $proxypassword
     */
    public function setHTTPProxy($proxyhost, $proxyport, $proxyusername = '', $proxypassword = '')
    {
        $this->proxyhost     = $proxyhost;
        $this->proxyport     = $proxyport;
        $this->proxyusername = $proxyusername;
        $this->proxypassword = $proxypassword;
    }

    /**
     * If authenticating, set user credentials here
     *
     * @param    string $username
     * @param    string $password
     * @param    string $authtype    (basic|digest|certificate|ntlm)
     * @param    array  $certRequest (keys must be cainfofile (optional), sslcertfile, sslkeyfile, passphrase, verifypeer (optional), verifyhost (optional): see corresponding options in cURL docs)
     */
    public function setCredentials($username, $password, $authtype = 'basic', $certRequest = [])
    {
        $this->debug("setCredentials username=$username authtype=$authtype certRequest=");
        $this->appendDebug($this->varDump($certRequest));
        $this->username    = $username;
        $this->password    = $password;
        $this->authtype    = $authtype;
        $this->certRequest = $certRequest;
    }

    /**
     * Use HTTP encoding
     *
     * @param    string $enc HTTP encoding
     */
    public function setHTTPEncoding($enc = 'gzip, deflate')
    {
        $this->debug("setHTTPEncoding(\"$enc\")");
        $this->http_encoding = $enc;
    }

    /**
     * Set whether to try to use cURL connections if possible
     *
     * @param    bool $use Whether to try to use cURL
     */
    public function setUseCURL($use)
    {
        $this->debug("setUseCURL($use)");
        $this->use_curl = $use;
    }

    /**
     * Use HTTP persistent connections if possible
     */
    public function useHTTPPersistentConnection()
    {
        $this->debug('useHTTPPersistentConnection');
        $this->persistentConnection = true;
    }

    /**
     * Gets the default RPC parameter setting.
     * If true, default is that call params are like RPC even for document style.
     * Each call() can override this value.
     *
     * This is no longer used.
     *
     * @return bool
     * @deprecated
     */
    public function getDefaultRpcParams()
    {
        return $this->defaultRpcParams;
    }

    /**
     * Sets the default RPC parameter setting.
     * If true, default is that call params are like RPC even for document style
     * Each call() can override this value.
     *
     * This is no longer used.
     *
     * @param    bool $rpcParams
     * @deprecated
     */
    public function setDefaultRpcParams($rpcParams)
    {
        $this->defaultRpcParams = $rpcParams;
    }

    /**
     * Dynamically creates an instance of a proxy class,
     * allowing user to directly call methods from Wsdl
     *
     * @return   object soap_proxy object
     */
    public function getProxy()
    {
        $r       = mt_rand();
        $evalStr = $this->_getProxyClassCode($r);
        //$this->debug("proxy class: $evalStr");
        if ($this->getError()) {
            $this->debug('Error from _getProxyClassCode, so return null');

            return null;
        }
        // eval the class
        eval($evalStr);

The use of eval() is discouraged.

        // instantiate proxy object
        eval("\$proxy = new Nusoap_proxy_$r('');");

The use of eval() is discouraged.

        // transfer current Wsdl data to the proxy thereby avoiding parsing the Wsdl twice
        $proxy->endpointType = 'Wsdl';

The variable $proxy seems to be never defined.

        $proxy->wsdlFile         = $this->wsdlFile;
        $proxy->wsdl             = $this->wsdl;
        $proxy->operations       = $this->operations;
        $proxy->defaultRpcParams = $this->defaultRpcParams;
        // transfer other state
        $proxy->soap_defencoding     = $this->soap_defencoding;
        $proxy->username             = $this->username;
        $proxy->password             = $this->password;
        $proxy->authtype             = $this->authtype;
        $proxy->certRequest          = $this->certRequest;
        $proxy->requestHeaders       = $this->requestHeaders;
        $proxy->endpoint             = $this->endpoint;
        $proxy->forceEndpoint        = $this->forceEndpoint;
        $proxy->proxyhost            = $this->proxyhost;
        $proxy->proxyport            = $this->proxyport;
        $proxy->proxyusername        = $this->proxyusername;
        $proxy->proxypassword        = $this->proxypassword;
        $proxy->http_encoding        = $this->http_encoding;
        $proxy->timeout              = $this->timeout;
        $proxy->response_timeout     = $this->response_timeout;
        $proxy->persistentConnection = $this->persistentConnection;
        $proxy->decode_utf8          = $this->decode_utf8;
        $proxy->curl_options         = $this->curl_options;
        $proxy->bindingType          = $this->bindingType;
        $proxy->use_curl             = $this->use_curl;

        return $proxy;
    }

    /**
     * Dynamically creates proxy class code
     *
     * @param string $r
     * @return   string PHP/NuSOAP code for the proxy class
     */
    private function _getProxyClassCode($r)
    {
        $this->debug("in getProxy endpointType=$this->endpointType");
        $this->appendDebug('Wsdl=' . $this->varDump($this->wsdl));
        if ('Wsdl' !== $this->endpointType) {
            $evalStr = 'A proxy can only be created for a WSDL client';
            $this->setError($evalStr);
            $evalStr = "echo \"$evalStr\";";

            return $evalStr;
        }
        if ('Wsdl' === $this->endpointType && null === $this->wsdl) {
            $this->loadWSDL();
            if ($this->getError()) {
                return 'echo "' . $this->getError() . '";';
            }
        }
        $evalStr = '';
        foreach ($this->operations as $operation => $opData) {
            if ('' !== $operation) {
                // create param string and param comment string
                if (is_array($opData['input']['parts']) && count($opData['input']['parts']) > 0) {
                    $paramStr        = '';
                    $paramArrayStr   = '';
                    $paramCommentStr = '';
                    foreach ($opData['input']['parts'] as $name => $type) {
                        $paramStr        .= "\$$name, ";
                        $paramArrayStr   .= "'$name' => \$$name, ";
                        $paramCommentStr .= "$type \$$name, ";
                    }
                    $paramStr        = mb_substr($paramStr, 0, -2);
                    $paramArrayStr   = mb_substr($paramArrayStr, 0, -2);
                    $paramCommentStr = mb_substr($paramCommentStr, 0, -2);
                } else {
                    $paramStr        = '';
                    $paramArrayStr   = '';
                    $paramCommentStr = 'void';
                }
                $opData['namespace'] = !isset($opData['namespace']) ? 'http://testuri.com' : $opData['namespace'];
                $evalStr             .= "// $paramCommentStr
	function " . str_replace('.', '__', $operation) . "($paramStr) {
		\$params = array($paramArrayStr);
		return \$this->call('$operation', \$params, '" . $opData['namespace'] . "', '" . (isset($opData['soapAction']) ? $opData['soapAction'] : '') . "');
	}
	";
                unset($paramStr, $paramCommentStr);
            }
        }
        $evalStr = 'class Nusoap_proxy_' . $r . ' extends Nusoap_client {
	' . $evalStr . '
}';

        return $evalStr;
    }

    /**
     * Dynamically creates proxy class code
     *
     * @return   string PHP/NuSOAP code for the proxy class
     */
    public function getProxyClassCode()
    {
        $r = mt_rand();

        return $this->_getProxyClassCode($r);
    }

    /**
     * Gets the HTTP body for the current request.
     *
     * @param string $soapmsg The SOAP payload
     * @return string The HTTP body, which includes the SOAP payload
     */
    private function getHTTPBody($soapmsg)
    {
        return $soapmsg;
    }

    /**
     * Gets the HTTP content type for the current request.
     *
     * Note: getHTTPBody must be called before this.
     *
     * @return string the HTTP content type for the current request.
     */
    private function getHTTPContentType()
    {
        return 'text/xml';
    }

    /**
     * Gets the HTTP content type charset for the current request.
     * Returns false for non-text content types.
     *
     * Note: getHTTPBody must be called before this.
     *
     * @return string the HTTP content type charset for the current request.
     */
    private function getHTTPContentTypeCharset()
    {
        return $this->soap_defencoding;
    }

    /*
    * Whether or not parser should decode utf8 element content
    *
    * @return   always returns true
    * @access   public
    */

    /**
     * @param $bool
     * @return bool
     */
    public function decodeUTF8($bool)
    {
        $this->decode_utf8 = $bool;

        return true;
    }

    /**
     * Adds a new Cookie into $this->cookies array
     *
     * @param    string $name  Cookie Name
     * @param    string $value Cookie Value
     * @return bool if cookie-set was successful returns true, else false
     */
    public function setCookie($name, $value)
    {
        if ('' === $name) {
            return false;
        }
        $this->cookies[] = ['name' => $name, 'value' => $value];

        return true;
    }

    /**
     * Gets all Cookies
     *
     * @return   array with all internal cookies
     */
    public function getCookies()
    {
        return $this->cookies;
    }

    /**
     * Checks all Cookies and delete those which are expired
     *
     * @return   bool always return true
     */
    private function checkCookies()
    {
        if (0 === count($this->cookies)) {
            return true;
        }
        $this->debug('checkCookie: check ' . count($this->cookies) . ' cookies');
        $curr_cookies  = $this->cookies;
        $this->cookies = [];
        foreach ($curr_cookies as $cookie) {
            if (!is_array($cookie)) {
                $this->debug('Remove cookie that is not an array');
                continue;
            }
            if (isset($cookie['expires']) && !empty($cookie['expires'])) {
                if (strtotime($cookie['expires']) > time()) {
                    $this->cookies[] = $cookie;
                } else {
                    $this->debug('Remove expired cookie ' . $cookie['name']);
                }
            } else {
                $this->cookies[] = $cookie;
            }
        }
        $this->debug('checkCookie: ' . count($this->cookies) . ' cookies left in array');

        return true;
    }

    /**
     * Updates the current cookies with a new set
     *
     * @param    array $cookies new cookies with which to update current ones
     * @return bool always return true
     */
    private function UpdateCookies($cookies)
    {
        if (0 === count($this->cookies)) {
            // no existing cookies: take whatever is new
            if (is_array($cookies) && count($cookies) > 0) {
                $this->debug('Setting new cookie(s)');
                $this->cookies = $cookies;
            }

            return true;
        }
        if (0 === count($cookies)) {
            // no new cookies: keep what we've got
            return true;
        }
        // merge
        foreach ($cookies as $newCookie) {
            if (!is_array($newCookie)) {
                continue;
            }
            if (!isset($newCookie['name']) || !isset($newCookie['value'])) {
                continue;
            }
            $newName = $newCookie['name'];
            $found   = false;
            for ($i = 0, $iMax = count($this->cookies); $i < $iMax; ++$i) {
                $cookie = $this->cookies[$i];
                if (!is_array($cookie)) {
                    continue;
                }
                if (!isset($cookie['name'])) {
                    continue;
                }
                if ($newName !== $cookie['name']) {
                    continue;
                }
                $newDomain = isset($newCookie['domain']) ? $newCookie['domain'] : 'NODOMAIN';
                $domain    = isset($cookie['domain']) ? $cookie['domain'] : 'NODOMAIN';
                if ($newDomain !== $domain) {
                    continue;
                }
                $newPath = isset($newCookie['path']) ? $newCookie['path'] : 'NOPATH';
                $path    = isset($cookie['path']) ? $cookie['path'] : 'NOPATH';
                if ($newPath !== $path) {
                    continue;
                }
                $this->cookies[$i] = $newCookie;
                $found             = true;
                $this->debug('Update cookie ' . $newName . '=' . $newCookie['value']);
                break;
            }
            if (!$found) {
                $this->debug('Add cookie ' . $newName . '=' . $newCookie['value']);
                $this->cookies[] = $newCookie;
            }
        }

        return true;
    }
}

if (!extension_loaded('soap')) {
    /**
     *    For backwards compatiblity, define Soapclient unless the PHP SOAP extension is loaded.
     */
    class Soapclient extends Nusoap_client
    {
    }
}