pack(); * * or * * $myPacker = new JavaScriptPacker($script, 'Normal', true, false); * $packed = $myPacker->pack(); * * or (default values) * * $myPacker = new JavaScriptPacker($script); * $packed = $myPacker->pack(); * * * params of the constructor : * $script: the JavaScript to pack, string. * $encoding: level of encoding, int or string : * 0,10,62,95 or 'None', 'Numeric', 'Normal', 'High ASCII'. * default: 62. * $fastDecode: include the fast decoder in the packed result, boolean. * default : true. * $specialChars: if you are flagged your private and local variables * in the script, boolean. * default: false. * * The pack() method return the compressed JavasScript, as a string. * * see http://dean.edwards.name/packer/usage/ for more information. * * Notes : * # need PHP 5 . Tested with PHP 5.1.2, 5.1.3, 5.1.4, 5.2.3 * * # The packed result may be different than with the Dean Edwards * version, but with the same length. The reason is that the PHP * function usort to sort array don't necessarily preserve the * original order of two equal member. The Javascript sort function * in fact preserve this order (but that's not require by the * ECMAScript standard). So the encoded keywords order can be * different in the two results. * * # Be careful with the 'High ASCII' Level encoding if you use * UTF-8 in your files... */ class JavaScriptPacker { // constants const IGNORE = '$1'; // validate parameters private $_script = ''; private $_encoding = 62; private $_fastDecode = true; private $_specialChars = false; private $LITERAL_ENCODING = array( 'None' => 0, 'Numeric' => 10, 'Normal' => 62, 'High ASCII' => 95 ); public function __construct($_script, $_encoding = 62, $_fastDecode = true, $_specialChars = false) { $this->_script = $_script . "\n"; if (array_key_exists($_encoding, $this->LITERAL_ENCODING)) $_encoding = $this->LITERAL_ENCODING[$_encoding]; $this->_encoding = min((int) $_encoding, 95); $this->_fastDecode = $_fastDecode; $this->_specialChars = $_specialChars; } public function pack() { $this->_addParser('_basicCompression'); if ($this->_specialChars) $this->_addParser('_encodeSpecialChars'); if ($this->_encoding) $this->_addParser('_encodeKeywords'); // go! return $this->_pack($this->_script); } // apply all parsing routines private function _pack($script) { for ($i = 0; isset($this->_parsers[$i]); $i++) { $script = call_user_func(array(&$this, $this->_parsers[$i]), $script); } return $script; } // keep a list of parsing functions, they'll be executed all at once private $_parsers = array(); private function _addParser($parser) { $this->_parsers[] = $parser; } // zero encoding - just removal of white space and comments private function _basicCompression($script) { $parser = new ParseMaster(); // make safe $parser->escapeChar = '\\'; // protect strings $parser->add('/\'[^\'\\n\\r]*\'/', self::IGNORE); $parser->add('/"[^"\\n\\r]*"/', self::IGNORE); // remove comments $parser->add('/\\/\\/[^\\n\\r]*[\\n\\r]/', ' '); $parser->add('/\\/\\*[^*]*\\*+([^\\/][^*]*\\*+)*\\//', ' '); // protect regular expressions $parser->add('/\\s+(\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?)/', '$2'); // IGNORE $parser->add('/[^\\w\\x24\\/\'"*)\\?:]\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?/', self::IGNORE); // remove: ;;; doSomething(); if ($this->_specialChars) $parser->add('/;;;[^\\n\\r]+[\\n\\r]/'); // remove redundant semi-colons $parser->add('/\\(;;\\)/', self::IGNORE); // protect for (;;) loops $parser->add('/;+\\s*([};])/', '$2'); // apply the above $script = $parser->exec($script); // remove white-space $parser->add('/(\\b|\\x24)\\s+(\\b|\\x24)/', '$2 $3'); $parser->add('/([+\\-])\\s+([+\\-])/', '$2 $3'); $parser->add('/\\s+/', ''); // done return $parser->exec($script); } private function _encodeSpecialChars($script) { $parser = new ParseMaster(); // replace: $name -> n, $$name -> na $parser->add('/((\\x24+)([a-zA-Z$_]+))(\\d*)/', array('fn' => '_replace_name') ); // replace: _name -> _0, double-underscore (__name) is ignored $regexp = '/\\b_[A-Za-z\\d]\\w*/'; // build the word list $keywords = $this->_analyze($script, $regexp, '_encodePrivate'); // quick ref $encoded = $keywords['encoded']; $parser->add($regexp, array( 'fn' => '_replace_encoded', 'data' => $encoded ) ); return $parser->exec($script); } private function _encodeKeywords($script) { // escape high-ascii values already in the script (i.e. in strings) if ($this->_encoding > 62) $script = $this->_escape95($script); // create the parser $parser = new ParseMaster(); $encode = $this->_getEncoder($this->_encoding); // for high-ascii, don't encode single character low-ascii $regexp = ($this->_encoding > 62) ? '/\\w\\w+/' : '/\\w+/'; // build the word list $keywords = $this->_analyze($script, $regexp, $encode); $encoded = $keywords['encoded']; // encode $parser->add($regexp, array( 'fn' => '_replace_encoded', 'data' => $encoded ) ); if (empty($script)) return $script; else { //$res = $parser->exec($script); //$res = $this->_bootStrap($res, $keywords); //return $res; return $this->_bootStrap($parser->exec($script), $keywords); } } private function _analyze($script, $regexp, $encode) { // analyse // retreive all words in the script $all = array(); preg_match_all($regexp, $script, $all); $_sorted = array(); // list of words sorted by frequency $_encoded = array(); // dictionary of word->encoding $_protected = array(); // instances of "protected" words $all = $all[0]; // simulate the javascript comportement of global match if (!empty($all)) { $unsorted = array(); // same list, not sorted $protected = array(); // "protected" words (dictionary of word->"word") $value = array(); // dictionary of charCode->encoding (eg. 256->ff) $this->_count = array(); // word->count $i = count($all); $j = 0; //$word = null; // count the occurrences - used for sorting later do { --$i; $word = '$' . $all[$i]; if (!isset($this->_count[$word])) { $this->_count[$word] = 0; $unsorted[$j] = $word; // make a dictionary of all of the protected words in this script // these are words that might be mistaken for encoding //if (is_string($encode) && method_exists($this, $encode)) $values[$j] = call_user_func(array(&$this, $encode), $j); $protected['$' . $values[$j]] = $j++; } // increment the word counter $this->_count[$word]++; } while ($i > 0); // prepare to sort the word list, first we must protect // words that are also used as codes. we assign them a code // equivalent to the word itself. // e.g. if "do" falls within our encoding range // then we store keywords["do"] = "do"; // this avoids problems when decoding $i = count($unsorted); do { $word = $unsorted[--$i]; if (isset($protected[$word]) /*!= null*/) { $_sorted[$protected[$word]] = substr($word, 1); $_protected[$protected[$word]] = true; $this->_count[$word] = 0; } } while ($i); // sort the words by frequency // Note: the javascript and php version of sort can be different : // in php manual, usort : // " If two members compare as equal, // their order in the sorted array is undefined." // so the final packed script is different of the Dean's javascript version // but equivalent. // the ECMAscript standard does not guarantee this behaviour, // and thus not all browsers (e.g. Mozilla versions dating back to at // least 2003) respect this. usort($unsorted, array(&$this, '_sortWords')); $j = 0; // because there are "protected" words in the list // we must add the sorted words around them do { if (!isset($_sorted[$i])) $_sorted[$i] = substr($unsorted[$j++], 1); $_encoded[$_sorted[$i]] = $values[$i]; } while (++$i < count($unsorted)); } return array( 'sorted' => $_sorted, 'encoded' => $_encoded, 'protected' => $_protected); } private $_count = array(); private function _sortWords($match1, $match2) { return $this->_count[$match2] - $this->_count[$match1]; } // build the boot function used for loading and decoding private function _bootStrap($packed, $keywords) { $ENCODE = $this->_safeRegExp('$encode\\($count\\)'); // $packed: the packed script $packed = "'" . $this->_escape($packed) . "'"; // $ascii: base for encoding $ascii = min(count($keywords['sorted']), $this->_encoding); if ($ascii == 0) $ascii = 1; // $count: number of words contained in the script $count = count($keywords['sorted']); // $keywords: list of words contained in the script foreach ($keywords['protected'] as $i=>$value) { $keywords['sorted'][$i] = ''; } // convert from a string to an array ksort($keywords['sorted']); $keywords = "'" . implode('|', $keywords['sorted']) . "'.split('|')"; $encode = ($this->_encoding > 62) ? '_encode95' : $this->_getEncoder($ascii); $encode = $this->_getJSFunction($encode); $encode = preg_replace('/_encoding/', '$ascii', $encode); $encode = preg_replace('/arguments\\.callee/', '$encode', $encode); $inline = '\\$count' . ($ascii > 10 ? '.toString(\\$ascii)' : ''); // $decode: code snippet to speed up decoding if ($this->_fastDecode) { // create the decoder $decode = $this->_getJSFunction('_decodeBody'); if ($this->_encoding > 62) $decode = preg_replace('/\\\\w/', '[\\xa1-\\xff]', $decode); // perform the encoding inline for lower ascii values elseif ($ascii < 36) $decode = preg_replace($ENCODE, $inline, $decode); // special case: when $count==0 there are no keywords. I want to keep // the basic shape of the unpacking funcion so i'll frig the code... if ($count == 0) $decode = preg_replace($this->_safeRegExp('($count)\\s*=\\s*1'), '$1=0', $decode, 1); } // boot function $unpack = $this->_getJSFunction('_unpack'); if ($this->_fastDecode) { // insert the decoder $this->buffer = $decode; $unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastDecode'), $unpack, 1); } $unpack = preg_replace('/"/', "'", $unpack); if ($this->_encoding > 62) { // high-ascii // get rid of the word-boundaries for regexp matches $unpack = preg_replace('/\'\\\\\\\\b\'\s*\\+|\\+\s*\'\\\\\\\\b\'/', '', $unpack); } if ($ascii > 36 || $this->_encoding > 62 || $this->_fastDecode) { // insert the encode function $this->buffer = $encode; $unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastEncode'), $unpack, 1); } else { // perform the encoding inline $unpack = preg_replace($ENCODE, $inline, $unpack); } // pack the boot function too $unpackPacker = new JavaScriptPacker($unpack, 0, false, true); $unpack = $unpackPacker->pack(); // arguments $params = array($packed, $ascii, $count, $keywords); if ($this->_fastDecode) { $params[] = 0; $params[] = '{}'; } $params = implode(',', $params); // the whole thing //Firefox 4 fix, old: return 'eval(' . $unpack . '(' . $params . "))\n"; return "(typeof setTimeout=='function'?setTimeout:eval)(" . $unpack . "(" . $params . "));\n"; } private $buffer; private function _insertFastDecode($match) { return '{' . $this->buffer . ';'; } private function _insertFastEncode($match) { return '{$encode=' . $this->buffer . ';'; } // mmm.. ..which one do i need ?? private function _getEncoder($ascii) { return $ascii > 10 ? $ascii > 36 ? $ascii > 62 ? '_encode95' : '_encode62' : '_encode36' : '_encode10'; } // zero encoding // characters: 0123456789 private function _encode10($charCode) { return $charCode; } // inherent base36 support // characters: 0123456789abcdefghijklmnopqrstuvwxyz private function _encode36($charCode) { return base_convert($charCode, 10, 36); } // hitch a ride on base36 and add the upper case alpha characters // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ private function _encode62($charCode) { $res = ''; if ($charCode >= $this->_encoding) { $res = $this->_encode62((int) ($charCode / $this->_encoding)); } $charCode = $charCode % $this->_encoding; if ($charCode > 35) return $res . chr($charCode + 29); else return $res . base_convert($charCode, 10, 36); } // use high-ascii values // characters: ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ private function _encode95($charCode) { $res = ''; if ($charCode >= $this->_encoding) $res = $this->_encode95($charCode / $this->_encoding); return $res . chr(($charCode % $this->_encoding) + 161); } private function _safeRegExp($string) { return '/'.preg_replace('/\$/', '\\\$', $string).'/'; } private function _encodePrivate($charCode) { return "_" . $charCode; } // protect characters used by the parser private function _escape($script) { return preg_replace('/([\\\\\'])/', '\\\$1', $script); } // protect high-ascii characters already in the script private function _escape95($script) { return preg_replace_callback( '/[\\xa1-\\xff]/', array(&$this, '_escape95Bis'), $script ); } private function _escape95Bis($match) { return '\x'.((string) dechex(ord($match))); } private function _getJSFunction($aName) { if (defined('self::JSFUNCTION'.$aName)) return constant('self::JSFUNCTION'.$aName); else return ''; } // JavaScript Functions used. // Note : In Dean's version, these functions are converted // with 'String(aFunctionName);'. // This internal conversion complete the original code, ex : // 'while (aBool) anAction();' is converted to // 'while (aBool) { anAction(); }'. // The JavaScript functions below are corrected. // unpacking function - this is the boot strap function // data extracted from this packing routine is passed to // this function when decoded in the target // NOTE ! : without the ';' final. const JSFUNCTION_unpack = 'function ($packed, $ascii, $count, $keywords, $encode, $decode) { while ($count--) { if ($keywords[$count]) { $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]); } } return $packed; }'; /* 'function ($packed, $ascii, $count, $keywords, $encode, $decode) { while ($count--) if ($keywords[$count]) $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]); return $packed; }'; */ // code-snippet inserted into the unpacker to speed up decoding const JSFUNCTION_decodeBody = //_decode = function () { // does the browser support String.replace where the // replacement value is a function? ' if (!\'\'.replace(/^/, String)) { // decode all the values we need while ($count--) { $decode[$encode($count)] = $keywords[$count] || $encode($count); } // global replacement function $keywords = [function ($encoded) {return $decode[$encoded]}]; // generic match $encode = function () {return \'\\\\w+\'}; // reset the loop counter - we are now doing a global replace $count = 1; } '; //}; /* ' if (!\'\'.replace(/^/, String)) { // decode all the values we need while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count); // global replacement function $keywords = [function ($encoded) {return $decode[$encoded]}]; // generic match $encode = function () {return\'\\\\w+\'}; // reset the loop counter - we are now doing a global replace $count = 1; }'; */ // zero encoding // characters: 0123456789 const JSFUNCTION_encode10 = 'function ($charCode) { return $charCode; }';//;'; // inherent base36 support // characters: 0123456789abcdefghijklmnopqrstuvwxyz const JSFUNCTION_encode36 = 'function ($charCode) { return $charCode.toString(36); }';//;'; // hitch a ride on base36 and add the upper case alpha characters // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ const JSFUNCTION_encode62 = 'function ($charCode) { return ($charCode < _encoding ? \'\' : arguments.callee(parseInt($charCode / _encoding))) + (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36)); }'; // use high-ascii values // characters: ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ const JSFUNCTION_encode95 = 'function ($charCode) { return ($charCode < _encoding ? \'\' : arguments.callee($charCode / _encoding)) + String.fromCharCode($charCode % _encoding + 161); }'; } class ParseMaster { public $ignoreCase = false; public $escapeChar = ''; // constants const EXPRESSION = 0; const REPLACEMENT = 1; const LENGTH = 2; // used to determine nesting levels private $GROUPS = '/\\(/';//g private $SUB_REPLACE = '/\\$\\d/'; private $INDEXED = '/^\\$\\d+$/'; private $TRIM = '/([\'"])\\1\\.(.*)\\.\\1\\1$/'; private $ESCAPE = '/\\\./';//g private $QUOTE = '/\'/'; private $DELETED = '/\\x01[^\\x01]*\\x01/';//g public function add($expression, $replacement = '') { // count the number of sub-expressions // - add one because each pattern is itself a sub-expression $length = 1 + preg_match_all($this->GROUPS, $this->_internalEscape((string) $expression), $out); // treat only strings $replacement if (is_string($replacement)) { // does the pattern deal with sub-expressions? if (preg_match($this->SUB_REPLACE, $replacement)) { // a simple lookup? (e.g. "$2") if (preg_match($this->INDEXED, $replacement)) { // store the index (used for fast retrieval of matched strings) $replacement = (int) (substr($replacement, 1)) - 1; } else { // a complicated lookup (e.g. "Hello $2 $1") // build a function to do the lookup $quote = preg_match($this->QUOTE, $this->_internalEscape($replacement)) ? '"' : "'"; $replacement = array( 'fn' => '_backReferences', 'data' => array( 'replacement' => $replacement, 'length' => $length, 'quote' => $quote ) ); } } } // pass the modified arguments if (!empty($expression)) $this->_add($expression, $replacement, $length); else $this->_add('/^$/', $replacement, $length); } public function exec($string) { // execute the global replacement $this->_escaped = array(); // simulate the _patterns.toSTring of Dean $regexp = '/'; foreach ($this->_patterns as $reg) { $regexp .= '(' . substr($reg[self::EXPRESSION], 1, -1) . ')|'; } $regexp = substr($regexp, 0, -1) . '/'; $regexp .= ($this->ignoreCase) ? 'i' : ''; $string = $this->_escape($string, $this->escapeChar); $string = preg_replace_callback( $regexp, array( &$this, '_replacement' ), $string ); $string = $this->_unescape($string, $this->escapeChar); return preg_replace($this->DELETED, '', $string); } public function reset() { // clear the patterns collection so that this object may be re-used $this->_patterns = array(); } // private private $_escaped = array(); // escaped characters private $_patterns = array(); // patterns stored by index // create and add a new pattern to the patterns collection private function _add() { $arguments = func_get_args(); $this->_patterns[] = $arguments; } // this is the global replace function (it's quite complicated) private function _replacement($arguments) { if (empty($arguments)) return ''; $i = 1; $j = 0; // loop through the patterns while (isset($this->_patterns[$j])) { $pattern = $this->_patterns[$j++]; // do we have a result? if (isset($arguments[$i]) && ($arguments[$i] != '')) { $replacement = $pattern[self::REPLACEMENT]; if (is_array($replacement) && isset($replacement['fn'])) { if (isset($replacement['data'])) $this->buffer = $replacement['data']; return call_user_func(array(&$this, $replacement['fn']), $arguments, $i); } elseif (is_int($replacement)) { return $arguments[$replacement + $i]; } $delete = ($this->escapeChar == '' || strpos($arguments[$i], $this->escapeChar) === false) ? '' : "\x01" . $arguments[$i] . "\x01"; return $delete . $replacement; // skip over references to sub-expressions } else { $i += $pattern[self::LENGTH]; } } } private function _backReferences($match, $offset) { $replacement = $this->buffer['replacement']; $quote = $this->buffer['quote']; $i = $this->buffer['length']; while ($i) { $replacement = str_replace('$'.$i--, $match[$offset + $i], $replacement); } return $replacement; } private function _replace_name($match, $offset) { $length = strlen($match[$offset + 2]); $start = $length - max($length - strlen($match[$offset + 3]), 0); return substr($match[$offset + 1], $start, $length) . $match[$offset + 4]; } private function _replace_encoded($match, $offset) { return $this->buffer[$match[$offset]]; } // php : we cannot pass additional data to preg_replace_callback, // and we cannot use &$this in create_function, so let's go to lower level private $buffer; // encode escaped characters private function _escape($string, $escapeChar) { if ($escapeChar) { $this->buffer = $escapeChar; return preg_replace_callback( '/\\' . $escapeChar . '(.)' .'/', array(&$this, '_escapeBis'), $string ); } else { return $string; } } private function _escapeBis($match) { $this->_escaped[] = $match[1]; return $this->buffer; } // decode escaped characters private function _unescape($string, $escapeChar) { if ($escapeChar) { $regexp = '/'.'\\'.$escapeChar.'/'; $this->buffer = array('escapeChar'=> $escapeChar, 'i' => 0); return preg_replace_callback( $regexp, array(&$this, '_unescapeBis'), $string ); } else { return $string; } } private function _unescapeBis() { if (isset($this->_escaped[$this->buffer['i']]) && $this->_escaped[$this->buffer['i']] != '') { $temp = $this->_escaped[$this->buffer['i']]; } else { $temp = ''; } $this->buffer['i']++; return $this->buffer['escapeChar'] . $temp; } private function _internalEscape($string) { return preg_replace($this->ESCAPE, '', $string); } }