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<?php |
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namespace PhpXmlRpc\Helper; |
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use PhpXmlRpc\PhpXmlRpc; |
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/** |
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* @todo implement an interface |
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*/ |
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class Charset |
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{ |
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protected static $logger; |
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14
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// tables used for transcoding different charsets into us-ascii xml |
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protected $xml_iso88591_Entities = array("in" => array(), "out" => array()); |
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//protected $xml_cp1252_Entities = array('in' => array(), out' => array()); |
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protected $charset_supersets = array( |
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'US-ASCII' => array('ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3', 'ISO-8859-4', |
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'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', |
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'ISO-8859-9', 'ISO-8859-10', 'ISO-8859-11', 'ISO-8859-12', |
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'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'UTF-8', |
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'EUC-JP', 'EUC-', 'EUC-KR', 'EUC-CN',), |
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); |
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/** @var Charset $instance */ |
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protected static $instance = null; |
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/** |
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* This class is singleton for performance reasons. |
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* |
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* @return Charset |
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450 |
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* |
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* @todo should we just make $xml_iso88591_Entities a static variable instead ? |
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450 |
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*/ |
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443 |
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public static function instance() |
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{ |
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if (self::$instance === null) { |
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450 |
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self::$instance = new static(); |
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} |
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return self::$instance; |
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} |
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443 |
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public function getLogger() |
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{ |
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443 |
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if (self::$logger === null) { |
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self::$logger = Logger::instance(); |
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} |
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return self::$logger; |
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} |
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/** |
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* @param $logger |
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* @return void |
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*/ |
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public static function setLogger($logger) |
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{ |
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self::$logger = $logger; |
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} |
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/** |
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590 |
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* Force usage as singleton. |
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*/ |
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protected function __construct() |
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590 |
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{ |
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590 |
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} |
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588 |
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/** |
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20 |
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* @param string $tableName |
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* @return void |
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* |
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* @throws \Exception for unsupported $tableName |
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* |
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* @todo add support for cp1252 as well as latin-2 .. latin-10 |
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* Optimization creep: instead of building all those tables on load, keep them ready-made php files |
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20 |
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* which are not even included until needed |
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20 |
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* @todo should we add to the latin-1 table the characters from cp_1252 range, i.e. 128 to 159 ? |
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20 |
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* Those will NOT be present in true ISO-8859-1, but will save the unwary windows user from sending junk |
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* (though no luck when receiving them...) |
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20 |
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* Note also that, apparently, while 'ISO/IEC 8859-1' has no characters defined for bytes 128 to 159, |
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* IANA ISO-8859-1 does have well-defined 'C1' control codes for those - wikipedia's page on latin-1 says: |
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* "ISO-8859-1 is the IANA preferred name for this standard when supplemented with the C0 and C1 control codes |
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* from ISO/IEC 6429." Check what mbstring/iconv do by default with those? |
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*/ |
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protected function buildConversionTable($tableName) |
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{ |
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switch ($tableName) { |
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case 'xml_iso88591_Entities': |
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if (count($this->xml_iso88591_Entities['in'])) { |
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return; |
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} |
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for ($i = 0; $i < 32; $i++) { |
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$this->xml_iso88591_Entities["in"][] = chr($i); |
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$this->xml_iso88591_Entities["out"][] = "&#{$i};"; |
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} |
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/// @todo to be 'print safe', should we encode as well character 127 (DEL) ? |
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for ($i = 160; $i < 256; $i++) { |
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$this->xml_iso88591_Entities["in"][] = chr($i); |
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$this->xml_iso88591_Entities["out"][] = "&#{$i};"; |
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} |
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break; |
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107
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/*case 'xml_cp1252_Entities': |
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20 |
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if (count($this->xml_cp1252_Entities['in'])) { |
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return; |
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} |
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for ($i = 128; $i < 160; $i++) |
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{ |
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$this->xml_cp1252_Entities['in'][] = chr($i); |
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} |
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$this->xml_cp1252_Entities['out'] = array( |
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'€', '?', '‚', 'ƒ', |
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'„', '…', '†', '‡', |
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'ˆ', '‰', 'Š', '‹', |
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'Œ', '?', 'Ž', '?', |
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'?', '‘', '’', '“', |
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'”', '•', '–', '—', |
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'˜', '™', 'š', '›', |
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'œ', '?', 'ž', 'Ÿ' |
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); |
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$this->buildConversionTable('xml_iso88591_Entities'); |
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break;*/ |
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default: |
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throw new \Exception('Unsupported table: ' . $tableName); |
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} |
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} |
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/** |
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* Convert a string to the correct XML representation in a target charset. |
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* This involves: |
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* - character transformation for all characters which have a different representation in source and dest charsets |
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* - using 'charset entity' representation for all characters which are outside the target charset |
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689 |
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* |
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* To help correct communication of non-ascii chars inside strings, regardless of the charset used when sending |
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689 |
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* requests, parsing them, sending responses and parsing responses, an option is to convert all non-ascii chars |
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* present in the message into their equivalent 'charset entity'. Charset entities enumerated this way are |
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* independent of the charset encoding used to transmit them, and all XML parsers are bound to understand them. |
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* |
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* Note that when not sending a charset encoding mime type along with http headers, we are bound by RFC 3023 to emit |
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* strict us-ascii for 'text/xml' payloads (but we should review RFC 7303, which seems to have changed the rules...) |
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657 |
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* |
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* @param string $data |
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* @param string $srcEncoding |
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* @param string $destEncoding |
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* @return string |
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* |
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689 |
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* @todo do a bit of basic benchmarking: strtr vs. str_replace, str_replace vs htmlspecialchars, hand-coded conversion |
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689 |
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* vs mbstring when that is enabled |
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688 |
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* @todo make use of iconv when it is available and mbstring is not |
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676 |
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* @todo support aliases for charset names, eg ASCII, LATIN1, ISO-88591 (see f.e. polyfill-iconv for a list), |
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676 |
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* but then take those into account as well in other methods, ie. isValidCharset) |
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676 |
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* @todo when converting to ASCII, allow to choose whether to escape the range 0-31,127 (non-print chars) or not |
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* @todo allow picking different strategies to deal w. invalid chars? eg. source in latin-1 and chars 128-159 |
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* @todo add support for escaping using CDATA sections? (add cdata start and end tokens, replace only ']]>' with ']]]]><![CDATA[>') |
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*/ |
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public function encodeEntities($data, $srcEncoding = '', $destEncoding = '') |
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676 |
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{ |
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620 |
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if ($srcEncoding == '') { |
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// lame, but we know no better... |
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410 |
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$srcEncoding = PhpXmlRpc::$xmlrpc_internalencoding; |
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} |
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167
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410 |
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168
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410 |
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if ($destEncoding == '') { |
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410 |
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$destEncoding = 'US-ASCII'; |
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410 |
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} |
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410 |
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172
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// in case there is transcoding going on, let's upscale to UTF8 |
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173
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410 |
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/// @todo we should do this as well when $srcEncoding == $destEncoding and the encoding is not supported by |
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174
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44 |
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/// htmlspecialchars |
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175
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41 |
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if (!in_array($srcEncoding, array('UTF-8', 'ISO-8859-1', 'US-ASCII')) && $srcEncoding != $destEncoding && |
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176
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function_exists('mb_convert_encoding')) { |
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177
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3 |
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$data = mb_convert_encoding($data, 'UTF-8', str_replace('US-ASCII', 'ASCII', $srcEncoding)); |
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178
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$srcEncoding = 'UTF-8'; |
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179
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} |
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180
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410 |
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181
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$conversion = strtoupper($srcEncoding . '_' . $destEncoding); |
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182
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183
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403 |
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// list ordered with (expected) most common scenarios first |
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184
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403 |
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switch ($conversion) { |
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185
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22 |
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case 'UTF-8_UTF-8': |
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186
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22 |
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case 'ISO-8859-1_ISO-8859-1': |
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187
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403 |
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case 'US-ASCII_UTF-8': |
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188
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24 |
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case 'US-ASCII_US-ASCII': |
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189
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24 |
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case 'US-ASCII_ISO-8859-1': |
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190
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403 |
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//case 'CP1252_CP1252': |
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191
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24 |
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$escapedData = str_replace(array('&', '"', "'", '<', '>'), array('&', '"', ''', '<', '>'), $data); |
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192
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24 |
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break; |
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193
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403 |
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194
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23 |
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case 'UTF-8_US-ASCII': |
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195
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23 |
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case 'UTF-8_ISO-8859-1': |
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196
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403 |
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// NB: this will choke on invalid UTF-8, going most likely beyond EOF |
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197
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23 |
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$escapedData = ''; |
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198
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23 |
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// be kind to users creating string xmlrpc values out of different php types |
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199
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$data = (string)$data; |
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200
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403 |
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$ns = strlen($data); |
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201
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for ($nn = 0; $nn < $ns; $nn++) { |
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202
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$ch = $data[$nn]; |
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203
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77 |
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$ii = ord($ch); |
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204
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73 |
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// 7 bits in 1 byte: 0bbbbbbb (127) |
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205
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73 |
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if ($ii < 32) { |
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206
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73 |
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if ($conversion == 'UTF-8_US-ASCII') { |
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207
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73 |
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$escapedData .= sprintf('&#%d;', $ii); |
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208
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73 |
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} else { |
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209
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$escapedData .= $ch; |
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210
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33 |
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} |
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211
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33 |
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} |
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212
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33 |
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else if ($ii < 128) { |
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213
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33 |
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/// @todo shall we replace this with a (supposedly) faster str_replace? |
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214
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33 |
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/// @todo to be 'print safe', should we encode as well character 127 (DEL) ? |
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215
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33 |
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switch ($ii) { |
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216
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33 |
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case 34: |
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217
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$escapedData .= '"'; |
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218
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break; |
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219
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case 38: |
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220
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$escapedData .= '&'; |
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221
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break; |
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222
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case 39: |
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223
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$escapedData .= '''; |
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224
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break; |
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225
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case 60: |
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226
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$escapedData .= '<'; |
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227
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break; |
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228
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case 62: |
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229
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$escapedData .= '>'; |
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230
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410 |
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break; |
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231
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25 |
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default: |
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232
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25 |
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$escapedData .= $ch; |
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233
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} // switch |
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234
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410 |
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} // 11 bits in 2 bytes: 110bbbbb 10bbbbbb (2047) |
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235
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elseif ($ii >> 5 == 6) { |
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236
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613 |
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$b1 = ($ii & 31); |
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237
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30 |
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$b2 = (ord($data[$nn + 1]) & 63); |
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238
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30 |
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$ii = ($b1 * 64) + $b2; |
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239
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30 |
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$escapedData .= sprintf('&#%d;', $ii); |
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240
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$nn += 1; |
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241
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583 |
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} // 16 bits in 3 bytes: 1110bbbb 10bbbbbb 10bbbbbb |
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242
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583 |
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elseif ($ii >> 4 == 14) { |
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243
|
583 |
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$b1 = ($ii & 15); |
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244
|
583 |
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$b2 = (ord($data[$nn + 1]) & 63); |
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245
|
583 |
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$b3 = (ord($data[$nn + 2]) & 63); |
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246
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$ii = ((($b1 * 64) + $b2) * 64) + $b3; |
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247
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$escapedData .= sprintf('&#%d;', $ii); |
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248
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$nn += 2; |
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249
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} // 21 bits in 4 bytes: 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb |
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250
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elseif ($ii >> 3 == 30) { |
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251
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$b1 = ($ii & 7); |
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252
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$b2 = (ord($data[$nn + 1]) & 63); |
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253
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$b3 = (ord($data[$nn + 2]) & 63); |
|
254
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$b4 = (ord($data[$nn + 3]) & 63); |
|
255
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$ii = ((((($b1 * 64) + $b2) * 64) + $b3) * 64) + $b4; |
|
256
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$escapedData .= sprintf('&#%d;', $ii); |
|
257
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$nn += 3; |
|
258
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} |
|
259
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} |
|
260
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|
261
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// when converting to latin-1, do not be so eager with using entities for characters 160-255 |
|
262
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if ($conversion == 'UTF-8_ISO-8859-1') { |
|
263
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$this->buildConversionTable('xml_iso88591_Entities'); |
|
264
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$escapedData = str_replace(array_slice($this->xml_iso88591_Entities['out'], 32), array_slice($this->xml_iso88591_Entities['in'], 32), $escapedData); |
|
265
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} |
|
266
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break; |
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267
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268
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case 'ISO-8859-1_UTF-8': |
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269
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$escapedData = str_replace(array('&', '"', "'", '<', '>'), array('&', '"', ''', '<', '>'), $data); |
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270
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/// @todo if on php >= 8.2, prefer using mbstring or iconv. Also: suppress the warning! |
|
271
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$escapedData = utf8_encode($escapedData); |
|
272
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break; |
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273
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|
274
|
689 |
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case 'ISO-8859-1_US-ASCII': |
|
275
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$this->buildConversionTable('xml_iso88591_Entities'); |
|
276
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$escapedData = str_replace(array('&', '"', "'", '<', '>'), array('&', '"', ''', '<', '>'), $data); |
|
277
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$escapedData = str_replace($this->xml_iso88591_Entities['in'], $this->xml_iso88591_Entities['out'], $escapedData); |
|
278
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break; |
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279
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280
|
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|
/* |
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281
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|
|
case 'CP1252_US-ASCII': |
|
282
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|
$this->buildConversionTable('xml_cp1252_Entities'); |
|
283
|
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|
$escapedData = str_replace(array('&', '"', "'", '<', '>'), array('&', '"', ''', '<', '>'), $data); |
|
284
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$escapedData = str_replace($this->xml_iso88591_Entities']['in'], $this->xml_iso88591_Entities['out'], $escapedData); |
|
285
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|
|
$escapedData = str_replace($this->xml_cp1252_Entities['in'], $this->xml_cp1252_Entities['out'], $escapedData); |
|
286
|
|
|
break; |
|
287
|
|
|
case 'CP1252_UTF-8': |
|
288
|
|
|
$this->buildConversionTable('xml_cp1252_Entities'); |
|
289
|
|
|
$escapedData = str_replace(array('&', '"', "'", '<', '>'), array('&', '"', ''', '<', '>'), $data); |
|
290
|
|
|
/// @todo we could use real UTF8 chars here instead of xml entities... (note that utf_8 encode all alone will NOT convert them) |
|
291
|
|
|
$escapedData = str_replace($this->xml_cp1252_Entities['in'], $this->xml_cp1252_Entities['out'], $escapedData); |
|
292
|
|
|
$escapedData = utf8_encode($escapedData); |
|
293
|
|
|
break; |
|
294
|
|
|
case 'CP1252_ISO-8859-1': |
|
295
|
|
|
$this->buildConversionTable('xml_cp1252_Entities'); |
|
296
|
|
|
$escapedData = str_replace(array('&', '"', "'", '<', '>'), array('&', '"', ''', '<', '>'), $data); |
|
297
|
|
|
// we might as well replace all funky chars with a '?' here, but we are kind and leave it to the receiving application layer to decide what to do with these weird entities... |
|
298
|
|
|
$escapedData = str_replace($this->xml_cp1252_Entities['in'], $this->xml_cp1252_Entities['out'], $escapedData); |
|
299
|
|
|
break; |
|
300
|
|
|
*/ |
|
301
|
|
|
|
|
302
|
|
|
default: |
|
303
|
|
|
if (function_exists('mb_convert_encoding')) { |
|
304
|
|
|
// If reaching where, there are only 2 cases possible: UTF8->XXX or XXX->XXX |
|
305
|
|
|
// If src is UTF8, we run htmlspecialchars before converting to the target charset, as |
|
306
|
|
|
// htmlspecialchars has limited charset support, but it groks utf8 |
|
307
|
|
|
if ($srcEncoding === 'UTF-8') { |
|
308
|
|
|
$data = htmlspecialchars($data, defined('ENT_XML1') ? ENT_XML1 | ENT_QUOTES : ENT_QUOTES, 'UTF-8'); |
|
|
|
|
|
|
309
|
|
|
} |
|
310
|
|
|
if ($srcEncoding !== $destEncoding) { |
|
311
|
|
|
$data = mb_convert_encoding($data, str_replace('US-ASCII', 'ASCII', $destEncoding), str_replace('US-ASCII', 'ASCII', $srcEncoding)); |
|
312
|
|
|
} |
|
313
|
|
|
if ($data === false) { |
|
|
|
|
|
|
314
|
|
|
$escapedData = ''; |
|
315
|
|
|
$this->getLogger()->errorLog('XML-RPC: ' . __METHOD__ . ": Converting from $srcEncoding to $destEncoding via mbstring: failed..."); |
|
316
|
|
|
} else { |
|
317
|
|
|
if ($srcEncoding === 'UTF-8') { |
|
318
|
|
|
$escapedData = $data; |
|
319
|
|
|
} else { |
|
320
|
|
|
$escapedData = htmlspecialchars($data, defined('ENT_XML1') ? ENT_XML1 | ENT_QUOTES : ENT_QUOTES, $destEncoding); |
|
321
|
|
|
} |
|
322
|
|
|
} |
|
323
|
|
|
} else { |
|
324
|
|
|
$escapedData = ''; |
|
325
|
|
|
$this->getLogger()->errorLog('XML-RPC: ' . __METHOD__ . ": Converting from $srcEncoding to $destEncoding: not supported..."); |
|
326
|
|
|
} |
|
327
|
|
|
} |
|
328
|
|
|
|
|
329
|
|
|
return $escapedData; |
|
|
|
|
|
|
330
|
|
|
} |
|
331
|
|
|
|
|
332
|
|
|
/** |
|
333
|
|
|
* @return string[] |
|
334
|
|
|
*/ |
|
335
|
|
|
public function knownCharsets() |
|
336
|
|
|
{ |
|
337
|
|
|
$knownCharsets = array('UTF-8', 'ISO-8859-1', 'US-ASCII'); |
|
338
|
|
|
// Add all charsets which mbstring can handle, but remove junk not found in IANA registry at |
|
339
|
|
|
// http://www.iana.org/assignments/character-sets/character-sets.xhtml |
|
340
|
|
|
if (function_exists('mb_list_encodings')) { |
|
341
|
|
|
$knownCharsets = array_unique(array_merge($knownCharsets, array_diff(mb_list_encodings(), array( |
|
342
|
|
|
'pass', 'auto', 'wchar', 'BASE64', 'UUENCODE', 'ASCII', 'HTML-ENTITIES', 'Quoted-Printable', |
|
343
|
|
|
'7bit','8bit', 'byte2be', 'byte2le', 'byte4be', 'byte4le' |
|
344
|
|
|
)))); |
|
345
|
|
|
} |
|
346
|
|
|
return $knownCharsets; |
|
347
|
|
|
} |
|
348
|
|
|
|
|
349
|
|
|
/** |
|
350
|
|
|
* Checks if a given charset encoding is present in a list of encodings or if it is a valid subset of any encoding |
|
351
|
|
|
* in the list. |
|
352
|
|
|
* @deprecated kept around for BC, as it is not in use by the lib |
|
353
|
|
|
* |
|
354
|
|
|
* @param string $encoding charset to be tested |
|
355
|
|
|
* @param string|array $validList comma separated list of valid charsets (or array of charsets) |
|
356
|
|
|
* @return bool |
|
357
|
|
|
*/ |
|
358
|
|
|
public function isValidCharset($encoding, $validList) |
|
359
|
|
|
{ |
|
360
|
|
|
//trigger_error('Method ' . __METHOD__ . ' is deprecated', E_USER_DEPRECATED); |
|
361
|
|
|
|
|
362
|
|
|
if (is_string($validList)) { |
|
363
|
|
|
$validList = explode(',', $validList); |
|
364
|
|
|
} |
|
365
|
|
|
if (in_array(strtoupper($encoding), $validList)) { |
|
366
|
|
|
return true; |
|
367
|
|
|
} else { |
|
368
|
|
|
if (array_key_exists($encoding, $this->charset_supersets)) { |
|
369
|
|
|
foreach ($validList as $allowed) { |
|
370
|
|
|
if (in_array($allowed, $this->charset_supersets[$encoding])) { |
|
371
|
|
|
return true; |
|
372
|
|
|
} |
|
373
|
|
|
} |
|
374
|
|
|
} |
|
375
|
|
|
|
|
376
|
|
|
return false; |
|
377
|
|
|
} |
|
378
|
|
|
} |
|
379
|
|
|
|
|
380
|
|
|
/** |
|
381
|
|
|
* Used only for backwards compatibility. |
|
382
|
|
|
* @deprecated |
|
383
|
|
|
* |
|
384
|
|
|
* @param string $charset |
|
385
|
|
|
* @return array |
|
386
|
|
|
* @throws \Exception for unknown/unsupported charsets |
|
387
|
|
|
*/ |
|
388
|
|
|
public function getEntities($charset) |
|
389
|
|
|
{ |
|
390
|
|
|
//trigger_error('Method ' . __METHOD__ . ' is deprecated', E_USER_DEPRECATED); |
|
391
|
|
|
|
|
392
|
|
|
switch ($charset) |
|
393
|
|
|
{ |
|
394
|
|
|
case 'iso88591': |
|
395
|
|
|
return $this->xml_iso88591_Entities; |
|
396
|
|
|
default: |
|
397
|
|
|
throw new \Exception('Unsupported charset: ' . $charset); |
|
398
|
|
|
} |
|
399
|
|
|
} |
|
400
|
|
|
} |
|
401
|
|
|
|
gggeek /
phpxmlrpc
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