XoopsModules25x / xhelp

class/pear/PEAR.php

<?php
//
// +----------------------------------------------------------------------+
// | PEAR, the PHP Extension and Application Repository                   |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license,       |
// | that is bundled with this package in the file LICENSE, and is        |
// | available through the world-wide-web at the following url:           |
// | https://www.php.net/license/3_0.txt.                                  |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | license@php.net so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Authors: Sterling Hughes <sterling@php.net>                          |
// |          Stig Bakken <ssb@php.net>                                   |
// |          Tomas V.V.Cox <cox@idecnet.com>                             |
// +----------------------------------------------------------------------+
//
//

define('PEAR_ERROR_RETURN', 1);
define('PEAR_ERROR_PRINT', 2);
define('PEAR_ERROR_TRIGGER', 4);
define('PEAR_ERROR_DIE', 8);
define('PEAR_ERROR_CALLBACK', 16);
/**
 * WARNING: obsolete
 * @deprecated
 */
define('PEAR_ERROR_EXCEPTION', 32);
define(
    'PEAR_ZE2',
    function_exists('version_compare')
    && version_compare(zend_version(), '2-dev', 'ge')
);

if (0 === mb_strpos(PHP_OS, 'WIN')) {
    define('OS_WINDOWS', true);
    define('OS_UNIX', false);
    define('PEAR_OS', 'Windows');
} else {
    define('OS_WINDOWS', false);
    define('OS_UNIX', true);
    define('PEAR_OS', 'Unix'); // blatant assumption
}

// instant backwards compatibility
if (!defined('PATH_SEPARATOR')) {
    if (OS_WINDOWS) {
        define('PATH_SEPARATOR', ';');
    } else {
        define('PATH_SEPARATOR', ':');
    }
}

$GLOBALS['_PEAR_default_error_mode']     = PEAR_ERROR_RETURN;
$GLOBALS['_PEAR_default_error_options']  = E_USER_NOTICE;
$GLOBALS['_PEAR_destructor_object_list'] = [];
$GLOBALS['_PEAR_shutdown_funcs']         = [];
$GLOBALS['_PEAR_errorHandler_stack']     = [];

ini_set('track_errors', true);

true of type true is incompatible with the type string expected by parameter $value of ini_set().

/**
 * Base class for other PEAR classes.  Provides rudimentary
 * emulation of destructors.
 *
 * If you want a destructor in your class, inherit PEAR and make a
 * destructor method called _yourclassname (same name as the
 * constructor, but with a "_" prefix).  Also, in your constructor you
 * have to call the PEAR constructor: $this->PEAR();.
 * The destructor method will be called without parameters.  Note that
 * at in some SAPI implementations (such as Apache), any output during
 * the request shutdown (in which destructors are called) seems to be
 * discarded.  If you need to get any debug information from your
 * destructor, use error_log(), syslog() or something similar.
 *
 * IMPORTANT! To use the emulated destructors you need to create the
 * objects by reference: $obj = new PEAR_child;
 *
 * @since  PHP 4.0.2
 * @author Stig Bakken <ssb@php.net>
 * @see    https://pear.php.net/manual/
 */
class PEAR
{
    // {{{ properties
    /**
     * Whether to enable internal debug messages.
     *
     * @var bool
     */
    public $_debug = false;
    /**
     * Default error mode for this object.
     *
     * @var int
     */
    public $_default_error_mode = null;
    /**
     * Default error options used for this object when error mode
     * is PEAR_ERROR_TRIGGER.
     *
     * @var int
     */
    public $_default_error_options = null;
    /**
     * Default error handler (callback) for this object, if error mode is
     * PEAR_ERROR_CALLBACK.
     *
     * @var string
     */
    public $_default_errorHandler = '';
    /**
     * Which class to use for error objects.
     *
     * @var string
     */
    public $_error_class = 'PEAR_Error';
    /**
     * An array of expected errors.
     *
     * @var array
     */
    public $_expected_errors = [];
    // }}}

    // {{{ constructor

    /**
     * Constructor.  Registers this object in
     * $_PEAR_destructor_object_list for destructor emulation if a
     * destructor object exists.
     *
     * @param null $error_class    (optional) which class to use for

Are you sure the doc-type for parameter $error_class is correct as it would always require null to be passed?

     *                             error objects, defaults to PEAR_Error.
     */
    public function __construct($error_class = null)
    {
        $classname = get_class($this);
        if ($this->_debug) {
            print "PEAR constructor called, class=$classname\n";
        }
        if (null !== $error_class) {

The condition null !== $error_class is always false.

            $this->_error_class = $error_class;
        }
        while ($classname) {
            $destructor = "_$classname";
            if (method_exists($this, $destructor)) {
                global $_PEAR_destructor_object_list;
                $_PEAR_destructor_object_list[] = &$this;
                break;
            }
            $classname = get_parent_class($classname);
        }
    }

    // }}}
    // {{{ destructor

    /**
     * Destructor (the emulated type of...).  Does nothing right now,
     * but is included for forward compatibility, so subclass
     * destructors should always call it.
     *
     * See the note in the class desciption about output from
     * destructors.
     */
    public function _PEAR(): void
    {
        if ($this->_debug) {
            printf("PEAR destructor called, class=%s\n", get_class($this));
        }
    }

    // }}}
    // {{{ getStaticProperty()

    /**
     * If you have a class that's mostly/entirely static, and you need static
     * properties, you can use this method to simulate them. Eg. in your method(s)
     * do this: $myVar = &PEAR::getStaticProperty('myclass', 'myVar');
     * You MUST use a reference, or they will not persist!
     *
     * @param string $class  The calling classname, to prevent clashes
     * @param string $var    The variable to retrieve.
     * @return mixed  A reference to the variable. If not set it will be
     *                       auto initialised to NULL.
     */
    public function &getStaticProperty(string $class, string $var)
    {
        static $properties;

        return $properties[$class][$var];
    }

    // }}}
    // {{{ registerShutdownFunc()

    /**
     * Use this function to register a shutdown method for static
     * classes.
     *
     * @param mixed $func The function name (or array of class/method) to call
     * @param mixed $args The arguments to pass to the function
     */
    public function registerShutdownFunc($func, $args = []): void
    {
        $GLOBALS['_PEAR_shutdown_funcs'][] = [$func, $args];
    }

    // }}}
    // {{{ isError()

    /**
     * Tell whether a value is a PEAR error.
     *
     * @param mixed $data  the value to test
     * @param null  $code  if $data is an error object, return true

Are you sure the doc-type for parameter $code is correct as it would always require null to be passed?

     *                     only if $code is a string and
     *                     $obj->getMessage() == $code or
     *                     $code is an integer and $obj->getCode() == $code
     * @return bool  true if parameter is an error
     */
    public function isError($data, $code = null): bool
    {
        if (is_a($data, 'PEAR_Error')) {
            if (null === $code) {

The condition null === $code is always true.

                return true;
            } elseif (is_string($code)) {
                return $data->getMessage() == $code;
            }

            return $data->getCode() == $code;
        }

        return false;
    }

    // }}}
    // {{{ setErrorHandling()

    /**
     * Sets how errors generated by this object should be handled.
     * Can be invoked both in objects and statically.  If called
     * statically, setErrorHandling sets the default behaviour for all
     * PEAR objects.  If called in an object, setErrorHandling sets
     * the default behaviour for that object.
     *
     * @param null  $mode

Are you sure the doc-type for parameter $mode is correct as it would always require null to be passed?

     *                       One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
     *                       PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
     *                       PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION.
     *
     * @param mixed $options
     *                       When $mode is PEAR_ERROR_TRIGGER, this is the error level (one
     *                       of E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
     *
     *        When $mode is PEAR_ERROR_CALLBACK, this parameter is expected
     *        to be the callback function or method.  A callback
     *        function is a string with the name of the function, a
     *        callback method is an array of two elements: the element
     *        at index 0 is the object, and the element at index 1 is
     *        the name of the method to call in the object.
     *
     *        When $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is
     *        a printf format string used when printing the error
     *        message.
     *
     * @see    PEAR_ERROR_RETURN
     * @see    PEAR_ERROR_PRINT
     * @see    PEAR_ERROR_TRIGGER
     * @see    PEAR_ERROR_DIE
     * @see    PEAR_ERROR_CALLBACK
     * @see    PEAR_ERROR_EXCEPTION
     *
     * @since  PHP 4.0.5
     */
    public function setErrorHandling($mode = null, $options = null): void
    {
        if (isset($this) && $this instanceof self) {
            $setmode    = &$this->_default_error_mode;
            $setoptions = &$this->_default_error_options;
        } else {
            $setmode    = &$GLOBALS['_PEAR_default_error_mode'];
            $setoptions = &$GLOBALS['_PEAR_default_error_options'];
        }

        switch ($mode) {
            case PEAR_ERROR_EXCEPTION:

The constant PEAR_ERROR_EXCEPTION has been deprecated.

            case PEAR_ERROR_RETURN:
            case PEAR_ERROR_PRINT:
            case PEAR_ERROR_TRIGGER:
            case PEAR_ERROR_DIE:
            case null:
                $setmode    = $mode;
                $setoptions = $options;
                break;
            case PEAR_ERROR_CALLBACK:
                $setmode = $mode;
                // class/object method callback
                if (is_callable($options)) {
                    $setoptions = $options;
                } else {
                    trigger_error('invalid error callback', E_USER_WARNING);
                }
                break;
            default:
                trigger_error('invalid error mode', E_USER_WARNING);
                break;
        }
    }

    // }}}
    // {{{ expectError()

    /**
     * This method is used to tell which errors you expect to get.
     * Expected errors are always returned with error mode
     * PEAR_ERROR_RETURN.  Expected error codes are stored in a stack,
     * and this method pushes a new element onto it.  The list of
     * expected errors are in effect until they are popped off the
     * stack with the popExpect() method.
     *
     * Note that this method can not be called statically
     *
     * @param mixed $code a single error code or an array of error codes to expect
     *
     * @return int the new depth of the "expected errors" stack
     */
    public function expectError($code = '*'): int
    {
        if (is_array($code)) {
            $this->_expected_errors[] = $code;
        } else {
            $this->_expected_errors[] = [$code];
        }

        return count($this->_expected_errors);
    }

    // }}}
    // {{{ popExpect()

    /**
     * This method pops one element off the expected error codes
     * stack.
     *
     * @return array the list of error codes that were popped
     */
    public function popExpect(): array
    {
        return array_pop($this->_expected_errors);
    }

    // }}}
    // {{{ _checkDelExpect()

    /**
     * This method checks unsets an error code if available
     *
     * @param mixed $error_code
     * @return bool true if the error code was unset, false otherwise
     * @since  PHP 4.3.0
     */
    public function _checkDelExpect($error_code): bool
    {
        $deleted = false;

        foreach ($this->_expected_errors as $key => $error_array) {
            if (in_array($error_code, $error_array, true)) {
                unset($this->_expected_errors[$key][array_search($error_code, $error_array, true)]);
                $deleted = true;
            }

            // clean up empty arrays
            if (0 == count($this->_expected_errors[$key])) {
                unset($this->_expected_errors[$key]);
            }
        }

        return $deleted;
    }

    // }}}
    // {{{ delExpect()

    /**
     * This method deletes all occurences of the specified element from
     * the expected error codes stack.
     *
     * @param mixed $error_code error code that should be deleted
     * @return bool|\PEAR_Error list of error codes that were deleted or error
     * @since  PHP 4.3.0
     */
    public function delExpect($error_code)
    {
        $deleted = false;

        if (is_array($error_code) && (0 != count($error_code))) {
            // $error_code is a non-empty array here;
            // we walk through it trying to unset all
            // values
            foreach ($error_code as $key => $error) {
                if ($this->_checkDelExpect($error)) {
                    $deleted = true;
                } else {
                    $deleted = false;
                }
            }

            return $deleted ? true : self::raiseError('The expected error you submitted does not exist'); // IMPROVE ME

The method PEAR::raiseError() is not static, but was called statically.

        } elseif (!empty($error_code)) {
            // $error_code comes alone, trying to unset it
            if ($this->_checkDelExpect($error_code)) {
                return true;
            }

            return self::raiseError('The expected error you submitted does not exist'); // IMPROVE ME
        }
        // $error_code is empty
        return self::raiseError('The expected error you submitted is empty'); // IMPROVE ME
    }

    // }}}
    // {{{ raiseError()

    /**
     * This method is a wrapper that returns an instance of the
     * configured error class with this object's default error
     * handling applied.  If the $mode and $options parameters are not
     * specified, the object's defaults are used.
     *
     * @param mixed $message      a text error message or a PEAR error object
     *
     * @param null  $code         a numeric error code (it is up to your class

Are you sure the doc-type for parameter $code is correct as it would always require null to be passed?

     *                            to define these if you want to use codes)
     *
     * @param null  $mode         One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,

Are you sure the doc-type for parameter $mode is correct as it would always require null to be passed?

     *                            PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
     *                            PEAR_ERROR_CALLBACK, PEAR_ERROR_EXCEPTION.
     *
     * @param mixed $options      If $mode is PEAR_ERROR_TRIGGER, this parameter
     *                            specifies the PHP-internal error level (one of
     *                            E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
     *                            If $mode is PEAR_ERROR_CALLBACK, this
     *                            parameter specifies the callback function or
     *                            method.  In other error modes this parameter
     *                            is ignored.
     *
     * @param null  $userinfo     If you need to pass along for example debug

Are you sure the doc-type for parameter $userinfo is correct as it would always require null to be passed?

     *                            information, this parameter is meant for that.
     *
     * @param null  $error_class  The returned error object will be

Are you sure the doc-type for parameter $error_class is correct as it would always require null to be passed?

     *                            instantiated from this class, if specified.
     *
     * @param bool  $skipmsg      If true, raiseError will only pass error codes,
     *                            the error message parameter will be dropped.
     *
     * @return PEAR_Error a PEAR error object
     * @see    PEAR::setErrorHandling
     * @since  PHP 4.0.5
     */
    public function raiseError(
        $message = null, $code = null, $mode = null, $options = null, $userinfo = null, $error_class = null, bool $skipmsg = false
    ): PEAR_Error {
        // The error is yet a PEAR error object
        if (is_object($message)) {
            $code                          = $message->getCode();
            $userinfo                      = $message->getUserInfo();
            $error_class                   = $message->getType();
            $message->error_message_prefix = '';
            $message                       = $message->getMessage();
        }

        if (isset($this) && isset($this->_expected_errors) && count($this->_expected_errors) > 0 && count($exp = end($this->_expected_errors))) {
            if ('*' === $exp[0]
                || (is_int(reset($exp)) && in_array($code, $exp, true))
                || (is_string(reset($exp)) && in_array($message, $exp, true))) {
                $mode = PEAR_ERROR_RETURN;
            }
        }
        // No mode given, try global ones
        if (null === $mode) {
            // Class error handler
            if (isset($this) && isset($this->_default_error_mode)) {
                $mode    = $this->_default_error_mode;
                $options = $this->_default_error_options;
                // Global error handler
            } elseif (isset($GLOBALS['_PEAR_default_error_mode'])) {
                $mode    = $GLOBALS['_PEAR_default_error_mode'];
                $options = $GLOBALS['_PEAR_default_error_options'];
            }
        }

        if (null !== $error_class) {
            $ec = $error_class;
        } elseif (isset($this) && isset($this->_error_class)) {
            $ec = $this->_error_class;
        } else {
            $ec = 'PEAR_Error';
        }
        if ($skipmsg) {
            return new $ec($code, $mode, $options, $userinfo);
        }

        return new $ec($message, $code, $mode, $options, $userinfo);
    }

    // }}}
    // {{{ throwError()

    /**
     * Simpler form of raiseError with fewer options.  In most cases
     * message, code and userinfo are enough.
     *
     * @param null $message

Are you sure the doc-type for parameter $message is correct as it would always require null to be passed?

     *
     * @param null $code

Are you sure the doc-type for parameter $code is correct as it would always require null to be passed?

     * @param null $userinfo

Are you sure the doc-type for parameter $userinfo is correct as it would always require null to be passed?

     * @return object
     */
    public function throwError(
        $message = null, $code = null, $userinfo = null
    ) {
        if (isset($this) && $this instanceof self) {
            return $this->raiseError($message, $code, null, null, $userinfo);
        }

        return self::raiseError($message, $code, null, null, $userinfo);

The method PEAR::raiseError() is not static, but was called statically.

    }

    // }}}
    // {{{ pushErrorHandling()

    /**
     * Push a new error handler on top of the error handler options stack. With this
     * you can easily override the actual error handler for some code and restore
     * it later with popErrorHandling.
     *
     * @param mixed $mode    (same as setErrorHandling)
     * @param mixed $options (same as setErrorHandling)
     *
     * @return bool Always true
     *
     * @see PEAR::setErrorHandling
     */
    public function pushErrorHandling($mode, $options = null): bool
    {
        $stack = &$GLOBALS['_PEAR_errorHandler_stack'];
        if (isset($this) && $this instanceof self) {
            $def_mode    = &$this->_default_error_mode;
            $def_options = &$this->_default_error_options;
        } else {
            $def_mode    = &$GLOBALS['_PEAR_default_error_mode'];
            $def_options = &$GLOBALS['_PEAR_default_error_options'];
        }
        $stack[] = [$def_mode, $def_options];

        if (isset($this) && $this instanceof self) {
            $this->setErrorHandling($mode, $options);
        } else {
            self::setErrorHandling($mode, $options);

The method PEAR::setErrorHandling() is not static, but was called statically.

        }
        $stack[] = [$mode, $options];

        return true;
    }

    // }}}
    // {{{ popErrorHandling()

    /**
     * Pop the last error handler used
     *
     * @return bool Always true
     *
     * @see PEAR::pushErrorHandling
     */
    public function popErrorHandling(): bool
    {
        $stack = &$GLOBALS['_PEAR_errorHandler_stack'];
        array_pop($stack);
        [$mode, $options] = $stack[count($stack) - 1];
        array_pop($stack);
        if (isset($this) && $this instanceof self) {
            $this->setErrorHandling($mode, $options);
        } else {
            self::setErrorHandling($mode, $options);

The method PEAR::setErrorHandling() is not static, but was called statically.

        }

        return true;
    }

    // }}}
    // {{{ loadExtension()

    /**
     * OS independant PHP extension load. Remember to take care
     * on the correct extension name for case sensitive OSes.
     *
     * @param string $ext The extension name
     * @return bool   Success or not on the dl() call
     */
    public function loadExtension(string $ext): bool
    {
        if (!extension_loaded($ext)) {
            // if either returns true dl() will produce a FATAL error, stop that
            if ((1 != ini_get('enable_dl')) || (1 == ini_get('safe_mode'))) {
                return false;
            }
            if (OS_WINDOWS) {
                $suffix = '.dll';
            } elseif (PHP_OS === 'HP-UX') {
                $suffix = '.sl';
            } elseif (PHP_OS === 'AIX') {
                $suffix = '.a';
            } elseif (PHP_OS === 'OSX') {
                $suffix = '.bundle';
            } else {
                $suffix = '.so';
            }

            return @dl('php_' . $ext . $suffix) || @dl($ext . $suffix);
        }

        return true;
    }
    // }}}
}

// {{{ _PEAR_call_destructors()

function _PEAR_call_destructors(): void
{
    global $_PEAR_destructor_object_list;
    if (is_array($_PEAR_destructor_object_list)
        && count($_PEAR_destructor_object_list)) {
        reset($_PEAR_destructor_object_list);
        foreach ($_PEAR_destructor_object_list as $objref) {
            $classname = get_class($objref);
            while ($classname) {
                $destructor = "_$classname";
                if (method_exists($objref, $destructor)) {
                    $objref->$destructor();
                    break;
                }
                $classname = get_parent_class($classname);
            }
        }
        // Empty the object list to ensure that destructors are
        // not called more than once.
        $_PEAR_destructor_object_list = [];
    }

    // Now call the shutdown functions
    if (is_array($GLOBALS['_PEAR_shutdown_funcs']) && !empty($GLOBALS['_PEAR_shutdown_funcs'])) {
        foreach ($GLOBALS['_PEAR_shutdown_funcs'] as $value) {
            call_user_func_array($value[0], $value[1]);
        }
    }
}

// }}}

/**
 * Class PEAR_Error
 */
class PEAR_Error
{
    // {{{ properties

    public $error_message_prefix = '';
    public $mode                 = PEAR_ERROR_RETURN;
    public $level                = E_USER_NOTICE;
    public $code                 = -1;
    public $message              = '';
    public $userinfo             = '';
    public $backtrace            = null;
    // }}}
    // {{{ constructor

    /**
     * PEAR_Error constructor
     *
     * @param string $message  message
     *
     * @param null   $code     (optional) error code

Are you sure the doc-type for parameter $code is correct as it would always require null to be passed?

     *
     * @param null   $mode     (optional) error mode, one of: PEAR_ERROR_RETURN,

Are you sure the doc-type for parameter $mode is correct as it would always require null to be passed?

     *                         PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER,
     *                         PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION
     *
     * @param mixed  $options  (optional) error level, _OR_ in the case of
     *                         PEAR_ERROR_CALLBACK, the callback function or object/method
     *                         tuple.
     *
     * @param null   $userinfo (optional) additional user/debug info

Are you sure the doc-type for parameter $userinfo is correct as it would always require null to be passed?

     */
    public function __construct(
        string $message = 'unknown error', $code = null, $mode = null, $options = null, $userinfo = null
    ) {
        if (null === $mode) {

The condition null === $mode is always true.

            $mode = PEAR_ERROR_RETURN;
        }
        $this->message  = $message;
        $this->code     = $code;
        $this->mode     = $mode;
        $this->userinfo = $userinfo;
        if (function_exists('debug_backtrace')) {
            $this->backtrace = debug_backtrace();
        }
        if ($mode & PEAR_ERROR_CALLBACK) {
            $this->level    = E_USER_NOTICE;
            $this->callback = $options;

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

        } else {
            if (null === $options) {
                $options = E_USER_NOTICE;
            }
            $this->level    = $options;
            $this->callback = null;
        }
        if ($this->mode & PEAR_ERROR_PRINT) {
            if (null === $options || is_int($options)) {
                $format = '%s';
            } else {
                $format = $options;
            }
            printf($format, $this->getMessage());
        }
        if ($this->mode & PEAR_ERROR_TRIGGER) {
            trigger_error($this->getMessage(), $this->level);
        }
        if ($this->mode & PEAR_ERROR_DIE) {
            $msg = $this->getMessage();
            if (null === $options || is_int($options)) {
                $format = '%s';
                if ("\n" !== mb_substr($msg, -1)) {
                    $msg .= "\n";
                }
            } else {
                $format = $options;
            }
            exit(sprintf($format, $msg));

Using exit here is not recommended.

        }
        if ($this->mode & PEAR_ERROR_CALLBACK) {
            if (is_callable($this->callback)) {
                call_user_func($this->callback, $this);

It seems like $this->callback can also be of type null; however, parameter $callback of call_user_func() does only seem to accept callable, maybe add an additional type check?

            }
        }
        if ($this->mode & PEAR_ERROR_EXCEPTION) {

The constant PEAR_ERROR_EXCEPTION has been deprecated.

            trigger_error('PEAR_ERROR_EXCEPTION is obsolete, use class PEAR_ErrorStack for exceptions', E_USER_WARNING);
            eval('$e = new Exception($this->message, $this->code);$e->PEAR_Error = $this;throw($e);');

The use of eval() is discouraged.

        }
    }

    // }}}
    // {{{ getMode()

    /**
     * Get the error mode from an error object.
     *
     * @return int error mode
     */
    public function getMode(): ?int
    {
        return $this->mode;
    }

    // }}}
    // {{{ getCallback()

    /**
     * Get the callback function/method from an error object.
     *
     * @return mixed callback function or object/method array
     */
    public function getCallback()
    {
        return $this->callback;
    }

    // }}}
    // {{{ getMessage()

    /**
     * Get the error message from an error object.
     *
     * @return string full error message
     */
    public function getMessage(): string
    {
        return ($this->error_message_prefix . $this->message);
    }

    // }}}
    // {{{ getCode()

    /**
     * Get error code from an error object
     *
     * @return int error code
     */
    public function getCode(): ?int
    {
        return $this->code;
    }

    // }}}
    // {{{ getType()

    /**
     * Get the name of this error/exception.
     *
     * @return string error/exception name (type)
     */
    public function getType(): string
    {
        return get_class($this);
    }

    // }}}
    // {{{ getUserInfo()

    /**
     * Get additional user-supplied information.
     *
     * @return string user-supplied information
     */
    public function getUserInfo(): ?string
    {
        return $this->userinfo;
    }

    // }}}
    // {{{ getDebugInfo()

    /**
     * Get additional debug information supplied by the application.
     *
     * @return string debug information
     */
    public function getDebugInfo(): ?string
    {
        return $this->getUserInfo();
    }

    // }}}
    // {{{ getBacktrace()

    /**
     * Get the call backtrace from where the error was generated.
     * Supported with PHP 4.3.0 or newer.
     *
     * @param null $frame (optional) what frame to fetch

Are you sure the doc-type for parameter $frame is correct as it would always require null to be passed?

     * @return array Backtrace, or NULL if not available.
     */
    public function getBacktrace($frame = null): ?array
    {
        if (null === $frame) {

The condition null === $frame is always true.

            return $this->backtrace;
        }

        return $this->backtrace[$frame];
    }

    // }}}
    // {{{ addUserInfo()

    /**
     * @param string $info
     */
    public function addUserInfo($info): void
    {
        if (empty($this->userinfo)) {
            $this->userinfo = $info;
        } else {
            $this->userinfo .= " ** $info";
        }
    }

    // }}}
    // {{{ toString()

    /**
     * Make a string representation of this object.
     *
     * @return string a string with an object summary
     */
    public function toString(): string
    {
        $modes  = [];
        $levels = [
            E_USER_NOTICE  => 'notice',
            E_USER_WARNING => 'warning',
            E_USER_ERROR   => 'error',
        ];
        if ($this->mode & PEAR_ERROR_CALLBACK) {
            if (is_array($this->callback)) {
                $callback = get_class($this->callback[0]) . '::' . $this->callback[1];
            } else {
                $callback = $this->callback;
            }

            return sprintf('[%s: message="%s" code=%d mode=callback ' . 'callback=%s prefix="%s" info="%s"]', get_class($this), $this->message, $this->code, $callback, $this->error_message_prefix, $this->userinfo);
        }
        if ($this->mode & PEAR_ERROR_PRINT) {
            $modes[] = 'print';
        }
        if ($this->mode & PEAR_ERROR_TRIGGER) {
            $modes[] = 'trigger';
        }
        if ($this->mode & PEAR_ERROR_DIE) {
            $modes[] = 'die';
        }
        if ($this->mode & PEAR_ERROR_RETURN) {
            $modes[] = 'return';
        }

        return sprintf('[%s: message="%s" code=%d mode=%s level=%s ' . 'prefix="%s" info="%s"]', get_class($this), $this->message, $this->code, implode('|', $modes), $levels[$this->level], $this->error_message_prefix, $this->userinfo);
    }
    // }}}
}

register_shutdown_function('_PEAR_call_destructors');

/*
 * Local Variables:
 * mode: php
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 */