mirror of
https://github.com/Oreolek/ifhub.club.git
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537 lines
22 KiB
PHP
537 lines
22 KiB
PHP
<?php
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/**
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* JsHttpRequest: PHP backend for JavaScript DHTML loader.
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* (C) Dmitry Koterov, http://en.dklab.ru
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* See http://www.gnu.org/copyleft/lesser.html
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*
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* Do not remove this comment if you want to use the script!
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* Íå óäàëÿéòå äàííûé êîììåíòàðèé, åñëè âû õîòèòå èñïîëüçîâàòü ñêðèïò!
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*
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* This backend library also supports POST requests additionally to GET.
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*
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* @author Dmitry Koterov
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* @version 5.x $Id$
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*/
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class JsHttpRequest
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{
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var $SCRIPT_ENCODING = "windows-1251";
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var $SCRIPT_DECODE_MODE = '';
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var $LOADER = null;
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var $ID = null;
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var $RESULT = null;
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// Internal; uniq value.
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var $_uniqHash;
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// Magic number for display_error checking.
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var $_magic = 14623;
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// Previous display_errors value.
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var $_prevDisplayErrors = null;
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// Internal: response content-type depending on loader type.
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var $_contentTypes = array(
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"script" => "text/javascript",
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"xml" => "text/plain", // In XMLHttpRequest mode we must return text/plain - stupid Opera 8.0. :(
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"form" => "text/html",
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"" => "text/plain", // for unknown loader
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);
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// Internal: conversion to UTF-8 JSON cancelled because of non-ascii key.
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var $_toUtfFailed = false;
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// Internal: list of characters 128...255 (for strpbrk() ASCII check).
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var $_nonAsciiChars = '';
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// Which Unicode conversion function is available?
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var $_unicodeConvMethod = null;
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// Emergency memory buffer to be freed on memory_limit error.
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var $_emergBuffer = null;
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/**
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* Constructor.
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*
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* Create new JsHttpRequest backend object and attach it
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* to script output buffer. As a result - script will always return
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* correct JavaScript code, even in case of fatal errors.
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*
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* QUERY_STRING is in form of: PHPSESSID=<sid>&a=aaa&b=bbb&JsHttpRequest=<id>-<loader>
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* where <id> is a request ID, <loader> is a loader name, <sid> - a session ID (if present),
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* PHPSESSID - session parameter name (by default = "PHPSESSID").
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*
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* If an object is created WITHOUT an active AJAX query, it is simply marked as
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* non-active. Use statuc method isActive() to check.
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*/
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function JsHttpRequest($enc)
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{
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global $JsHttpRequest_Active;
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// To be on a safe side - do not allow to drop reference counter on ob processing.
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$GLOBALS['_RESULT'] =& $this->RESULT;
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// Parse QUERY_STRING.
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if (preg_match('/^(.*)(?:&|^)JsHttpRequest=(?:(\d+)-)?([^&]+)((?:&|$).*)$/s', @$_SERVER['QUERY_STRING'], $m)) {
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$this->ID = $m[2];
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$this->LOADER = strtolower($m[3]);
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$_SERVER['QUERY_STRING'] = preg_replace('/^&+|&+$/s', '', preg_replace('/(^|&)'.session_name().'=[^&]*&?/s', '&', $m[1] . $m[4]));
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unset(
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$_GET['JsHttpRequest'],
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$_REQUEST['JsHttpRequest'],
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$_GET[session_name()],
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$_POST[session_name()],
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$_REQUEST[session_name()]
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);
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// Detect Unicode conversion method.
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$this->_unicodeConvMethod = function_exists('mb_convert_encoding')? 'mb' : (function_exists('iconv')? 'iconv' : null);
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// Fill an emergency buffer. We erase it at the first line of OB processor
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// to free some memory. This memory may be used on memory_limit error.
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$this->_emergBuffer = str_repeat('a', 1024 * 200);
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// Intercept fatal errors via display_errors (seems it is the only way).
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$this->_uniqHash = md5('JsHttpRequest' . microtime() . getmypid());
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$this->_prevDisplayErrors = ini_get('display_errors');
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ini_set('display_errors', $this->_magic); //
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ini_set('error_prepend_string', $this->_uniqHash . ini_get('error_prepend_string'));
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ini_set('error_append_string', ini_get('error_append_string') . $this->_uniqHash);
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if (function_exists('xdebug_disable')) xdebug_disable(); // else Fatal errors are not catched
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// Start OB handling early.
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ob_start(array(&$this, "_obHandler"));
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$JsHttpRequest_Active = true;
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// Set up the encoding.
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$this->setEncoding($enc);
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// Check if headers are already sent (see Content-Type library usage).
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// If true - generate a debug message and exit.
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$file = $line = null;
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$headersSent = version_compare(PHP_VERSION, "4.3.0") < 0? headers_sent() : headers_sent($file, $line);
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if ($headersSent) {
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trigger_error(
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"HTTP headers are already sent" . ($line !== null? " in $file on line $line" : " somewhere in the script") . ". "
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. "Possibly you have an extra space (or a newline) before the first line of the script or any library. "
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. "Please note that JsHttpRequest uses its own Content-Type header and fails if "
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. "this header cannot be set. See header() function documentation for more details",
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E_USER_ERROR
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);
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exit();
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}
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} else {
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$this->ID = 0;
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$this->LOADER = 'unknown';
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$JsHttpRequest_Active = false;
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}
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}
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/**
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* Static function.
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* Returns true if JsHttpRequest output processor is currently active.
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*
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* @return boolean True if the library is active, false otherwise.
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*/
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function isActive()
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{
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return !empty($GLOBALS['JsHttpRequest_Active']);
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}
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/**
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* string getJsCode()
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*
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* Return JavaScript part of the library.
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*/
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function getJsCode()
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{
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return file_get_contents(dirname(__FILE__) . '/JsHttpRequest.js');
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}
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/**
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* void setEncoding(string $encoding)
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*
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* Set an active script encoding & correct QUERY_STRING according to it.
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* Examples:
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* "windows-1251" - set plain encoding (non-windows characters,
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* e.g. hieroglyphs, are totally ignored)
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* "windows-1251 entities" - set windows encoding, BUT additionally replace:
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* "&" -> "&"
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* hieroglyph -> &#XXXX; entity
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*/
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function setEncoding($enc)
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{
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// Parse an encoding.
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preg_match('/^(\S*)(?:\s+(\S*))$/', $enc, $p);
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$this->SCRIPT_ENCODING = strtolower(!empty($p[1])? $p[1] : $enc);
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$this->SCRIPT_DECODE_MODE = !empty($p[2])? $p[2] : '';
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// Manually parse QUERY_STRING because of damned Unicode's %uXXXX.
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$this->_correctSuperglobals();
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}
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/**
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* string quoteInput(string $input)
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*
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* Quote a string according to the input decoding mode.
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* If entities are used (see setEncoding()), no '&' character is quoted,
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* only '"', '>' and '<' (we presume that '&' is already quoted by
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* an input reader function).
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*
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* Use this function INSTEAD of htmlspecialchars() for $_GET data
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* in your scripts.
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*/
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function quoteInput($s)
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{
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if ($this->SCRIPT_DECODE_MODE == 'entities')
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return str_replace(array('"', '<', '>'), array('"', '<', '>'), $s);
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else
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return htmlspecialchars($s);
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}
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/**
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* Convert a PHP scalar, array or hash to JS scalar/array/hash. This function is
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* an analog of json_encode(), but it can work with a non-UTF8 input and does not
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* analyze the passed data. Output format must be fully JSON compatible.
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*
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* @param mixed $a Any structure to convert to JS.
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* @return string JavaScript equivalent structure.
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*/
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function php2js($a=false)
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{
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if (is_null($a)) return 'null';
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if ($a === false) return 'false';
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if ($a === true) return 'true';
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if (is_scalar($a)) {
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if (is_float($a)) {
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// Always use "." for floats.
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$a = str_replace(",", ".", strval($a));
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}
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// All scalars are converted to strings to avoid indeterminism.
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// PHP's "1" and 1 are equal for all PHP operators, but
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// JS's "1" and 1 are not. So if we pass "1" or 1 from the PHP backend,
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// we should get the same result in the JS frontend (string).
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// Character replacements for JSON.
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static $jsonReplaces = array(
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array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'),
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array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"')
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);
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return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $a) . '"';
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}
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$isList = true;
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for ($i = 0, reset($a); $i < count($a); $i++, next($a)) {
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if (key($a) !== $i) {
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$isList = false;
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break;
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}
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}
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$result = array();
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if ($isList) {
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foreach ($a as $v) {
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$result[] = JsHttpRequest::php2js($v);
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}
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return '[ ' . join(', ', $result) . ' ]';
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} else {
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foreach ($a as $k => $v) {
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$result[] = JsHttpRequest::php2js($k) . ': ' . JsHttpRequest::php2js($v);
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}
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return '{ ' . join(', ', $result) . ' }';
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}
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}
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/**
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* Internal methods.
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*/
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/**
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* Parse & decode QUERY_STRING.
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*/
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function _correctSuperglobals()
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{
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// In case of FORM loader we may go to nirvana, everything is already parsed by PHP.
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if ($this->LOADER == 'form') return;
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// ATTENTION!!!
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// HTTP_RAW_POST_DATA is only accessible when Content-Type of POST request
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// is NOT default "application/x-www-form-urlencoded"!!!
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// Library frontend sets "application/octet-stream" for that purpose,
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// see JavaScript code. In PHP 5.2.2.HTTP_RAW_POST_DATA is not set sometimes;
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// in such cases - read the POST data manually from the STDIN stream.
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$rawPost = strcasecmp($_SERVER['REQUEST_METHOD'], 'POST') == 0? (isset($GLOBALS['HTTP_RAW_POST_DATA'])? $GLOBALS['HTTP_RAW_POST_DATA'] : @file_get_contents("php://input")) : null;
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$source = array(
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'_GET' => !empty($_SERVER['QUERY_STRING'])? $_SERVER['QUERY_STRING'] : null,
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'_POST'=> $rawPost,
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);
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foreach ($source as $dst=>$src) {
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// First correct all 2-byte entities.
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$s = preg_replace('/%(?!5B)(?!5D)([0-9a-f]{2})/si', '%u00\\1', $src);
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// Now we can use standard parse_str() with no worry!
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$data = null;
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parse_str($s, $data);
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$GLOBALS[$dst] = $this->_ucs2EntitiesDecode($data);
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}
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$GLOBALS['HTTP_GET_VARS'] = $_GET; // deprecated vars
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$GLOBALS['HTTP_POST_VARS'] = $_POST;
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$_REQUEST =
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(isset($_COOKIE)? $_COOKIE : array()) +
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(isset($_POST)? $_POST : array()) +
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(isset($_GET)? $_GET : array());
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if (ini_get('register_globals')) {
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// TODO?
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}
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}
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/**
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* Called in case of error too!
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*/
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function _obHandler($text)
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{
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unset($this->_emergBuffer); // free a piece of memory for memory_limit error
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unset($GLOBALS['JsHttpRequest_Active']);
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// Check for error & fetch a resulting data.
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if (preg_match("/{$this->_uniqHash}(.*?){$this->_uniqHash}/sx", $text, $m)) {
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if (!ini_get('display_errors') || (!$this->_prevDisplayErrors && ini_get('display_errors') == $this->_magic)) {
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// Display_errors:
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// 1. disabled manually after the library initialization, or
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// 2. was initially disabled and is not changed
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$text = str_replace($m[0], '', $text); // strip whole error message
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} else {
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$text = str_replace($this->_uniqHash, '', $text);
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}
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}
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// $f = fopen('/a', 'w'); fwrite($f, "{$text}\n{$this->_uniqHash}"); fclose($f);
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if ($m && preg_match('/\bFatal error(<.*?>)?:/i', $m[1])) {
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// On fatal errors - force null result (generate 500 error).
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$this->RESULT = null;
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} else {
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// Make a resulting hash.
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if (!isset($this->RESULT)) {
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global $_RESULT;
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$this->RESULT = $_RESULT;
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}
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}
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$result = array(
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'id' => $this->ID,
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'js' => $this->RESULT,
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'text' => $text,
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);
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$text = null;
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$encoding = $this->SCRIPT_ENCODING;
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$status = $this->RESULT !== null? 200 : 500;
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// Try to use very fast json_encode: 3-4 times faster than a manual encoding.
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if (function_exists('array_walk_recursive') && function_exists('json_encode') && $this->_unicodeConvMethod) {
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$this->_nonAsciiChars = join("", array_map('chr', range(128, 255)));
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$this->_toUtfFailed = false;
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$resultUtf8 = $result;
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array_walk_recursive($resultUtf8, array(&$this, '_toUtf8_callback'), $this->SCRIPT_ENCODING);
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if (!$this->_toUtfFailed) {
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// If some key contains non-ASCII character, convert everything manually.
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$text = json_encode($resultUtf8);
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$encoding = "UTF-8";
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}
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}
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// On failure, use manual encoding.
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if ($text === null) {
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$text = $this->php2js($result);
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}
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if ($this->LOADER != "xml") {
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// In non-XML mode we cannot use plain JSON. So - wrap with JS function call.
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// If top.JsHttpRequestGlobal is not defined, loading is aborted and
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// iframe is removed, so - do not call dataReady().
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$text = ""
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. ($this->LOADER == "form"? 'top && top.JsHttpRequestGlobal && top.JsHttpRequestGlobal' : 'JsHttpRequest')
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. ".dataReady(" . $text . ")\n"
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. "";
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if ($this->LOADER == "form") {
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$text = '<script type="text/javascript" language="JavaScript"><!--' . "\n$text" . '//--></script>';
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}
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// Always return 200 code in non-XML mode (else SCRIPT does not work in FF).
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// For XML mode, 500 code is okay.
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$status = 200;
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}
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// Status header. To be safe, display it only in error mode. In case of success
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// termination, do not modify the status (""HTTP/1.1 ..." header seems to be not
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// too cross-platform).
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if ($this->RESULT === null) {
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if (php_sapi_name() == "cgi") {
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header("Status: $status");
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} else {
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header("HTTP/1.1 $status");
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}
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}
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// In XMLHttpRequest mode we must return text/plain - damned stupid Opera 8.0. :(
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$ctype = !empty($this->_contentTypes[$this->LOADER])? $this->_contentTypes[$this->LOADER] : $this->_contentTypes[''];
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header("Content-type: $ctype; charset=$encoding");
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return $text;
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}
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/**
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* Internal function, used in array_walk_recursive() before json_encode() call.
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* If a key contains non-ASCII characters, this function sets $this->_toUtfFailed = true,
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* becaues array_walk_recursive() cannot modify array keys.
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*/
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function _toUtf8_callback(&$v, $k, $fromEnc)
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{
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if ($v === null || is_bool($v)) return;
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if ($this->_toUtfFailed || !is_scalar($v) || strpbrk($k, $this->_nonAsciiChars) !== false) {
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$this->_toUtfFailed = true;
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} else {
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$v = $this->_unicodeConv($fromEnc, 'UTF-8', $v);
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}
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}
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/**
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* Decode all %uXXXX entities in string or array (recurrent).
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* String must not contain %XX entities - they are ignored!
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*/
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function _ucs2EntitiesDecode($data)
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{
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if (is_array($data)) {
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$d = array();
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foreach ($data as $k=>$v) {
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$d[$this->_ucs2EntitiesDecode($k)] = $this->_ucs2EntitiesDecode($v);
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}
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return $d;
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} else {
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if (strpos($data, '%u') !== false) { // improve speed
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$data = preg_replace_callback('/%u([0-9A-F]{1,4})/si', array(&$this, '_ucs2EntitiesDecodeCallback'), $data);
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}
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return $data;
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}
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}
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/**
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* Decode one %uXXXX entity (RE callback).
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*/
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function _ucs2EntitiesDecodeCallback($p)
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{
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$hex = $p[1];
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$dec = hexdec($hex);
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if ($dec === "38" && $this->SCRIPT_DECODE_MODE == 'entities') {
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// Process "&" separately in "entities" decode mode.
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$c = "&";
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} else {
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if ($this->_unicodeConvMethod) {
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$c = @$this->_unicodeConv('UCS-2BE', $this->SCRIPT_ENCODING, pack('n', $dec));
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} else {
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$c = $this->_decUcs2Decode($dec, $this->SCRIPT_ENCODING);
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}
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if (!strlen($c)) {
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if ($this->SCRIPT_DECODE_MODE == 'entities') {
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$c = '&#' . $dec . ';';
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} else {
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$c = '?';
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}
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}
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}
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return $c;
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}
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/**
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* Wrapper for iconv() or mb_convert_encoding() functions.
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* This function will generate fatal error if none of these functons available!
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*
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* @see iconv()
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*/
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function _unicodeConv($fromEnc, $toEnc, $v)
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{
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if ($this->_unicodeConvMethod == 'iconv') {
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return iconv($fromEnc, $toEnc, $v);
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}
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return mb_convert_encoding($v, $toEnc, $fromEnc);
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}
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/**
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* If there is no ICONV, try to decode 1-byte characters and UTF-8 manually
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* (for most popular charsets only).
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*/
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/**
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* Convert from UCS-2BE decimal to $toEnc.
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*/
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function _decUcs2Decode($code, $toEnc)
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{
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// Little speedup by using array_flip($this->_encTables) and later hash access.
|
|
static $flippedTable = null;
|
|
if ($code < 128) return chr($code);
|
|
|
|
if (isset($this->_encTables[$toEnc])) {
|
|
if (!$flippedTable) $flippedTable = array_flip($this->_encTables[$toEnc]);
|
|
if (isset($flippedTable[$code])) return chr(128 + $flippedTable[$code]);
|
|
} else if ($toEnc == 'utf-8' || $toEnc == 'utf8') {
|
|
// UTF-8 conversion rules: http://www.cl.cam.ac.uk/~mgk25/unicode.html
|
|
if ($code < 0x800) {
|
|
return chr(0xC0 + ($code >> 6)) .
|
|
chr(0x80 + ($code & 0x3F));
|
|
} else { // if ($code <= 0xFFFF) -- it is almost always so for UCS2-BE
|
|
return chr(0xE0 + ($code >> 12)) .
|
|
chr(0x80 + (0x3F & ($code >> 6))) .
|
|
chr(0x80 + ($code & 0x3F));
|
|
}
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
|
|
/**
|
|
* UCS-2BE -> 1-byte encodings (from #128).
|
|
*/
|
|
var $_encTables = array(
|
|
'windows-1251' => array(
|
|
0x0402, 0x0403, 0x201A, 0x0453, 0x201E, 0x2026, 0x2020, 0x2021,
|
|
0x20AC, 0x2030, 0x0409, 0x2039, 0x040A, 0x040C, 0x040B, 0x040F,
|
|
0x0452, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
|
|
0x0098, 0x2122, 0x0459, 0x203A, 0x045A, 0x045C, 0x045B, 0x045F,
|
|
0x00A0, 0x040E, 0x045E, 0x0408, 0x00A4, 0x0490, 0x00A6, 0x00A7,
|
|
0x0401, 0x00A9, 0x0404, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x0407,
|
|
0x00B0, 0x00B1, 0x0406, 0x0456, 0x0491, 0x00B5, 0x00B6, 0x00B7,
|
|
0x0451, 0x2116, 0x0454, 0x00BB, 0x0458, 0x0405, 0x0455, 0x0457,
|
|
0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417,
|
|
0x0418, 0x0419, 0x041A, 0x041B, 0x041C, 0x041D, 0x041E, 0x041F,
|
|
0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427,
|
|
0x0428, 0x0429, 0x042A, 0x042B, 0x042C, 0x042D, 0x042E, 0x042F,
|
|
0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
|
|
0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
|
|
0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
|
|
0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
|
|
),
|
|
'koi8-r' => array(
|
|
0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
|
|
0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
|
|
0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
|
|
0x2264, 0x2265, 0x00A0, 0x2321, 0x00B0, 0x00B2, 0x00B7, 0x00F7,
|
|
0x2550, 0x2551, 0x2552, 0x0451, 0x2553, 0x2554, 0x2555, 0x2556,
|
|
0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x255C, 0x255d, 0x255E,
|
|
0x255F, 0x2560, 0x2561, 0x0401, 0x2562, 0x2563, 0x2564, 0x2565,
|
|
0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x256B, 0x256C, 0x00A9,
|
|
0x044E, 0x0430, 0x0431, 0x0446, 0x0434, 0x0435, 0x0444, 0x0433,
|
|
0x0445, 0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043d, 0x043E,
|
|
0x043F, 0x044F, 0x0440, 0x0441, 0x0442, 0x0443, 0x0436, 0x0432,
|
|
0x044C, 0x044B, 0x0437, 0x0448, 0x044d, 0x0449, 0x0447, 0x044A,
|
|
0x042E, 0x0410, 0x0411, 0x0426, 0x0414, 0x0415, 0x0424, 0x0413,
|
|
0x0425, 0x0418, 0x0419, 0x041A, 0x041B, 0x041C, 0x041d, 0x041E,
|
|
0x041F, 0x042F, 0x0420, 0x0421, 0x0422, 0x0423, 0x0416, 0x0412,
|
|
0x042C, 0x042B, 0x0417, 0x0428, 0x042d, 0x0429, 0x0427, 0x042A
|
|
),
|
|
);
|
|
}
|