php压缩多个CSS/JS文件
1. 压缩css
compress.php
<?php
header('Content-type: text/css');
ob_start("compress");
function compress($buffer) {
/* remove comments */
$buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
/* remove tabs, spaces, newlines, etc. */
$buffer = str_replace(array("\r\n", "\r", "\n", "\t", ' ', ' ', ' '), '', $buffer);
return $buffer;
}
/* your css files */
include('galleria.css');
include('articles.css');
ob_end_flush();
实例化：
test.php
<link href="compress.php" rel="stylesheet" type="text/css" /> <span id="tester">test</span>
2. 压缩js
利用jsmin类
来源：http://code.google.com/p/minify/
compress.php
header('Content-type: text/javascript');
require 'jsmin.php';
echo JSMin::minify(file_get_contents('common.js') . file_get_contents('common2.js'));
common.js
alert('first js');
common.js
alert('second js');
jsmin.php
<?php /** * jsmin.php - extended PHP implementation of Douglas Crockford's JSMin. * * <code> * $minifiedJs = JSMin::minify($js); * </code> * * This is a direct port of jsmin.c to PHP with a few PHP performance tweaks and * modifications to preserve some comments (see below). Also, rather than using * stdin/stdout, JSMin::minify() accepts a string as input and returns another * string as output. * * Comments containing IE conditional compilation are preserved, as are multi-line * comments that begin with "/*!" (for documentation purposes). In the latter case * newlines are inserted around the comment to enhance readability. * * PHP 5 or higher is required. * * Permission is hereby granted to use this version of the library under the * same terms as jsmin.c, which has the following license: * * -- * Copyright (c) 2002 Douglas Crockford (www.crockford.com) * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is furnished to do * so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * The Software shall be used for Good, not Evil. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * -- * * @package JSMin * @author Ryan Grove <[email protected]> (PHP port) * @author Steve Clay <[email protected]> (modifications + cleanup) * @author Andrea Giammarchi <http://www.3site.eu> (spaceBeforeRegExp) * @copyright 2002 Douglas Crockford <[email protected]> (jsmin.c) * @copyright 2008 Ryan Grove <[email protected]> (PHP port) * @license http://opensource.org/licenses/mit-license.php MIT License * @link http://code.google.com/p/jsmin-php/ */ class JSMin { const ORD_LF = 10; const ORD_SPACE = 32; const ACTION_KEEP_A = 1; const ACTION_DELETE_A = 2; const ACTION_DELETE_A_B = 3; protected $a = "\n"; protected $b = ''; protected $input = ''; protected $inputIndex = 0; protected $inputLength = 0; protected $lookAhead = null; protected $output = ''; /** * Minify Javascript * * @param string $js Javascript to be minified * @return string */ public static function minify($js) { // look out for syntax like "++ +" and "- ++" $p = '\\+'; $m = '\\-'; if (preg_match("/([$p$m])(?:\\1 [$p$m]| (?:$p$p|$m$m))/", $js)) { // likely pre-minified and would be broken by JSMin return $js; } $jsmin = new JSMin($js); return $jsmin->min(); } /* * Don't create a JSMin instance, instead use the static function minify, * which checks for mb_string function overloading and avoids errors * trying to re-minify the output of Closure Compiler * * @private */ public function __construct($input) { $this->input = $input; } /** * Perform minification, return result */ public function min() { if ($this->output !== '') { // min already run return $this->output; } $mbIntEnc = null; if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) { $mbIntEnc = mb_internal_encoding(); mb_internal_encoding('8bit'); } $this->input = str_replace("\r\n", "\n", $this->input); $this->inputLength = strlen($this->input); $this->action(self::ACTION_DELETE_A_B); while ($this->a !== null) { // determine next command $command = self::ACTION_KEEP_A; // default if ($this->a === ' ') { if (! $this->isAlphaNum($this->b)) { $command = self::ACTION_DELETE_A; } } elseif ($this->a === "\n") { if ($this->b === ' ') { $command = self::ACTION_DELETE_A_B; // in case of mbstring.func_overload & 2, must check for null b, // otherwise mb_strpos will give WARNING } elseif ($this->b === null || (false === strpos('{[(+-', $this->b) && ! $this->isAlphaNum($this->b))) { $command = self::ACTION_DELETE_A; } } elseif (! $this->isAlphaNum($this->a)) { if ($this->b === ' ' || ($this->b === "\n" && (false === strpos('}])+-"\'', $this->a)))) { $command = self::ACTION_DELETE_A_B; } } $this->action($command); } $this->output = trim($this->output); if ($mbIntEnc !== null) { mb_internal_encoding($mbIntEnc); } return $this->output; } /** * ACTION_KEEP_A = Output A. Copy B to A. Get the next B. * ACTION_DELETE_A = Copy B to A. Get the next B. * ACTION_DELETE_A_B = Get the next B. */ protected function action($command) { switch ($command) { case self::ACTION_KEEP_A: $this->output .= $this->a; // fallthrough case self::ACTION_DELETE_A: $this->a = $this->b; if ($this->a === "'" || $this->a === '"') { // string literal $str = $this->a; // in case needed for exception while (true) { $this->output .= $this->a; $this->a = $this->get(); if ($this->a === $this->b) { // end quote break; } if (ord($this->a) <= self::ORD_LF) { throw new JSMin_UnterminatedStringException( "JSMin: Unterminated String at byte " . $this->inputIndex . ": {$str}"); } $str .= $this->a; if ($this->a === '\\') { $this->output .= $this->a; $this->a = $this->get(); $str .= $this->a; } } } // fallthrough case self::ACTION_DELETE_A_B: $this->b = $this->next(); if ($this->b === '/' && $this->isRegexpLiteral()) { // RegExp literal $this->output .= $this->a . $this->b; $pattern = '/'; // in case needed for exception while (true) { $this->a = $this->get(); $pattern .= $this->a; if ($this->a === '/') { // end pattern break; // while (true) } elseif ($this->a === '\\') { $this->output .= $this->a; $this->a = $this->get(); $pattern .= $this->a; } elseif (ord($this->a) <= self::ORD_LF) { throw new JSMin_UnterminatedRegExpException( "JSMin: Unterminated RegExp at byte " . $this->inputIndex .": {$pattern}"); } $this->output .= $this->a; } $this->b = $this->next(); } // end case ACTION_DELETE_A_B } } protected function isRegexpLiteral() { if (false !== strpos("\n{;(,=:[!&|?", $this->a)) { // we aren't dividing return true; } if (' ' === $this->a) { $length = strlen($this->output); if ($length < 2) { // weird edge case return true; } // you can't divide a keyword if (preg_match('/(?:case|else|in|return|typeof)$/', $this->output, $m)) { if ($this->output === $m[0]) { // odd but could happen return true; } // make sure it's a keyword, not end of an identifier $charBeforeKeyword = substr($this->output, $length - strlen($m[0]) - 1, 1); if (! $this->isAlphaNum($charBeforeKeyword)) { return true; } } } return false; } /** * Get next char. Convert ctrl char to space. */ protected function get() { $c = $this->lookAhead; $this->lookAhead = null; if ($c === null) { if ($this->inputIndex < $this->inputLength) { $c = $this->input[$this->inputIndex]; $this->inputIndex += 1; } else { return null; } } if ($c === "\r" || $c === "\n") { return "\n"; } if (ord($c) < self::ORD_SPACE) { // control char return ' '; } return $c; } /** * Get next char. If is ctrl character, translate to a space or newline. */ protected function peek() { $this->lookAhead = $this->get(); return $this->lookAhead; } /** * Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII? */ protected function isAlphaNum($c) { return (preg_match('/^[0-9a-zA-Z_\\$\\\\]$/', $c) || ord($c) > 126); } protected function singleLineComment() { $comment = ''; while (true) { $get = $this->get(); $comment .= $get; if (ord($get) <= self::ORD_LF) { // EOL reached // if IE conditional comment if (preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $comment)) { return "/{$comment}"; } return $get; } } } protected function multipleLineComment() { $this->get(); $comment = ''; while (true) { $get = $this->get(); if ($get === '*') { if ($this->peek() === '/') { // end of comment reached $this->get(); // if comment preserved by YUI Compressor if (0 === strpos($comment, '!')) { return "\n/*" . substr($comment, 1) . "*/\n"; } // if IE conditional comment if (preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $comment)) { return "/*{$comment}*/"; } return ' '; } } elseif ($get === null) { throw new JSMin_UnterminatedCommentException( "JSMin: Unterminated comment at byte " . $this->inputIndex . ": /*{$comment}"); } $comment .= $get; } } /** * Get the next character, skipping over comments. * Some comments may be preserved. */ protected function next() { $get = $this->get(); if ($get !== '/') { return $get; } switch ($this->peek()) { case '/': return $this->singleLineComment(); case '*': return $this->multipleLineComment(); default: return $get; } } } class JSMin_UnterminatedStringException extends Exception {} class JSMin_UnterminatedCommentException extends Exception {} class JSMin_UnterminatedRegExpException extends Exception {}
实例化：
test.php
<script type="text/javascript" src="fonts.php"></script>