Javascript/CSS 多文件代码合并、安全压缩、优化(PHP版)

<?php /** * Javascript 代码压缩 * * 网址 : http://julying.com/lab/compress-js-css/ * 类型： 原创脚本 * 邮箱 : i@julying.com * 发布 : 2012-06-10 22:28 * 更新 : 2012-07-22 12:50 * 版权所有 2012 | julying.com * 此插件遵循 MIT、GPL2、GNU 许可. * 版权:Copyright (c) julying 版权所有，本程序为开源程序(开放源代码)。 * http://julying.com/code/license/ * *************************** * * 环境要求： >= PHP 5 * 用法 : * //采用 “加密”方式 * $myPacker = new compressJS($script, 62, true, false); * $packed = $myPacker->pack(); * * 或者 * //只是去除多余空格，换行。 * $myPacker = new compressJS($script, 'None', true, false); * $packed = $myPacker->pack(); * * 或者默认 * * $myPacker = new compressJS($script); * $packed = $myPacker->pack(); * * * 参数说明 : * $script: JavaScript 源码 * $encoding: 压缩的编码方式，可选参数有: 0,10,62,95 or 'None', 'Numeric', 'Normal', 'High ASCII'. * 默认: 0. * $fastDecode: 是否快速解码器 * 默认 : true. * # 注意：如果使用 'High ASCII' 编码方式，javascript 文件请使用 UTF-8 ，不然，你懂得。。。 */ class compressJS { // 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 t