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【JS】压缩css和js
作者:文率科技 / 发布于2014/7/1/ 495
首先你要知道php 《JSMin》这个类，压缩js很方便 css直接去回车就行了 file_put_contents(存放路径,str_replace(array("\r\n", "\r", "\n"), "", file_get_contents(要压缩的css文件路径))); $Jsmin = new \Common\Extend\Jsmin(); file_put_contents(存放路径, $Jsmin->minify(file_get_contents(要压缩的js路径)) ); 如有不明白的可以看我的博客，里面有一些php、js、css基础的教程

	
	JSMin类
	<?php
	/**
	* jsmin.php - PHP implementation of Douglas Crockford's JSMin.
	*
	* This is pretty much a direct port of jsmin.c to PHP with just a few
	* PHP-specific performance tweaks. Also, whereas jsmin.c reads from stdin and
	* outputs to stdout, this library accepts a string as input and returns another
	* string as output.
	*
	* 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 <ryan@wonko.com>
	* @copyright 2002 Douglas Crockford <douglas@crockford.com> (jsmin.c)
	* @copyright 2008 Ryan Grove <ryan@wonko.com> (PHP port)
	* @license http://opensource.org/licenses/mit-license.php MIT License
	* @version 1.1.1 (2008-03-02)
	* @link http://code.google.com/p/jsmin-php/
	*/
	namespace Common\Extend;
	class JSMin {
	 const ORD_LF = 10;
	 const ORD_SPACE = 32;

	 protected $a = '';
	 protected $b = '';
	 protected $input = '';
	 protected $inputIndex = 0;
	 protected $inputLength = 0;
	 protected $lookAhead = null;
	 protected $output = '';

	 // -- Public Static Methods --------------------------------------------------

	 public static function minify($js) {
	 $jsmin = new JSMin($js);
	 return $jsmin->min();
	 }

	 // -- Public Instance Methods ------------------------------------------------

	 public function __construct($input) {
	 $this->input = str_replace("\r\n", "\n", $input);
	 $this->inputLength = strlen($this->input);
	 }

	 // -- Protected Instance Methods ---------------------------------------------

	 protected function action($d) {
	 switch($d) {
	 case 1:
	 $this->output .= $this->a;

	 case 2:
	 $this->a = $this->b;

	 if ($this->a === "'" || $this->a === '"') {
	 for (;;) {
	 $this->output .= $this->a;
	 $this->a = $this->get();

	 if ($this->a === $this->b) {
	 break;
	 }

	 if (ord($this->a) <= self::ORD_LF) {
	 throw new JSMinException('Unterminated string literal.');
	 }

	 if ($this->a === '\\') {
	 $this->output .= $this->a;
	 $this->a = $this->get();
	 }
	 }
	 }

	 case 3:
	 $this->b = $this->next();

	 if ($this->b === '/' && (
	 $this->a === '(' || $this->a === ',' || $this->a === '=' ||
	 $this->a === ':' || $this->a === '[' || $this->a === '!' ||
	 $this->a === '&' || $this->a === '|' || $this->a === '?')) {

	 $this->output .= $this->a . $this->b;

	 for (;;) {
	 $this->a = $this->get();

	 if ($this->a === '/') {
	 break;
	 } elseif ($this->a === '\\') {
	 $this->output .= $this->a;
	 $this->a = $this->get();
	 } elseif (ord($this->a) <= self::ORD_LF) {
	 throw new JSMinException('Unterminated regular expression '.
	 'literal.');
	 }

	 $this->output .= $this->a;
	 }

	 $this->b = $this->next();
	 }
	 }
	 }

	 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 {
	 $c = null;
	 }
	 }

	 if ($c === "\r") {
	 return "\n";
	 }

	 if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) {
	 return $c;
	 }

	 return ' ';
	 }

	 protected function isAlphaNum($c) {
	 return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1;
	 }

	 protected function min() {
	 $this->a = "\n";
	 $this->action(3);

	 while ($this->a !== null) {
	 switch ($this->a) {
	 case ' ':
	 if ($this->isAlphaNum($this->b)) {
	 $this->action(1);
	 } else {
	 $this->action(2);
	 }
	 break;

	 case "\n":
	 switch ($this->b) {
	 case '{':
	 case '[':
	 case '(':
	 case '+':
	 case '-':
	 $this->action(1);
	 break;

	 case ' ':
	 $this->action(3);
	 break;

	 default:
	 if ($this->isAlphaNum($this->b)) {
	 $this->action(1);
	 }
	 else {
	 $this->action(2);
	 }
	 }
	 break;

	 default:
	 switch ($this->b) {
	 case ' ':
	 if ($this->isAlphaNum($this->a)) {
	 $this->action(1);
	 break;
	 }

	 $this->action(3);
	 break;

	 case "\n":
	 switch ($this->a) {
	 case '}':
	 case ']':
	 case ')':
	 case '+':
	 case '-':
	 case '"':
	 case "'":
	 $this->action(1);
	 break;

	 default:
	 if ($this->isAlphaNum($this->a)) {
	 $this->action(1);
	 }
	 else {
	 $this->action(3);
	 }
	 }
	 break;

	 default:
	 $this->action(1);
	 break;
	 }
	 }
	 }

	 return $this->output;
	 }

	 protected function next() {
	 $c = $this->get();

	 if ($c === '/') {
	 switch($this->peek()) {
	 case '/':
	 for (;;) {
	 $c = $this->get();

	 if (ord($c) <= self::ORD_LF) {
	 return $c;
	 }
	 }

	 case '*':
	 $this->get();

	 for (;;) {
	 switch($this->get()) {
	 case '*':
	 if ($this->peek() === '/') {
	 $this->get();
	 return ' ';
	 }
	 break;

	 case null:
	 throw new JSMinException('Unterminated comment.');
	 }
	 }

	 default:
	 return $c;
	 }
	 }

	 return $c;
	 }

	 protected function peek() {
	 $this->lookAhead = $this->get();
	 return $this->lookAhead;
	 }
	}

	// -- Exceptions ---------------------------------------------------------------
	class JSMinException {}
	//class JSMinException extends Exception {}
	?>
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