PHP动态压缩js,css

正式发布产品时，我们希望将项目里的js，css合并压缩，以减少http请求、防止轻易查看源代码。

使用

只需要在头部引入一下代码即可：

    <meta charset="utf-8"/>    <title>demo</title>    <?php    //定义需要压缩的文件    $css = array(        CSS_PATH . 'base.css',        CSS_PATH . 'style.css',        CSS_PATH . 'my.css'    );    $js = array(        PUB_PATH . '/lib/zepto.min.js',        PUB_PATH . '/js/1.js',        JS_PATH . '2.js',    );    $css_path = base_url(parse_css($css));    $js_path = base_url(parse_script($js));    ?>    <link rel="stylesheet" type="text/css" href="<?php echo $css_path ?>">    <script src="<?php echo $js_path ?>"></script>        <!--下面可以继续放不能压缩或者不想压缩的文件-->    <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

这段代码会在指定的目录(例如common/)里生成压缩过后的js和css.每次更新了js,css内容，请先删除生成的压缩文件。

 

示例：

4e387d5edce14cc2bd6396f6ebb7921b.css 7c10211f113f3175489196d336d67734.js

注意：
编写的css和js文件一定要符合规范。例如一定要加分号。js的function可以不加分号。

 

引用的资源

/***   合并压缩css*/function parse_css($urls){    $url = md5(implode(',', $urls));    $path = FCPATH. 'static/parse/';    $css_url = $path . $url . '.css';    if (!file_exists($css_url)) {        if (!file_exists($path))            mkdir($path, 0777);        $css_content = '';        foreach ($urls as $url) {            $css_content .= @file_get_contents($url);        }        $css_content = str_replace("\r\n", '', $css_content); //清除换行符        $css_content = str_replace("\n", '', $css_content); //清除换行符        $css_content = str_replace("\t", '', $css_content); //清除制表符        $css_content = str_replace("../images/", "./../common/images/", $css_content);        @file_put_contents($css_url, $css_content);    }    $css_url = str_replace(FCPATH, '', $css_url);    return $css_url;}/***   合并压缩js*/function parse_script($urls){    $url = md5(implode(',', $urls));    $path = FCPATH. '/static/parse/';    $js_url = $path . $url . '.js';    if (!file_exists($js_url)) {        if (!file_exists($path))            mkdir($path, 0777);        load_qy_lib('JavaScriptPacker');        $js_content = '';        foreach ($urls as $url) {            $append_content = @file_get_contents($url) . "\r\n";            $packer = new JavaScriptPacker($append_content);            $append_content = $packer->_basicCompression($append_content);            $js_content .= $append_content;        }        @file_put_contents($js_url, $js_content);    }    $js_url = str_replace(FCPATH, '', $js_url);    return $js_url;}

项目里引用到第三方类库JavaScriptPacker可以在github下载：

/** * 9 April 2008. version 1.1 * * This is the php version of the Dean Edwards JavaScript's Packer, * Based on : * * ParseMaster, version 1.0.2 (2005-08-19) Copyright 2005, Dean Edwards * a multi-pattern parser. * KNOWN BUG: erroneous behavior when using escapeChar with a replacement * value that is a function * * packer, version 2.0.2 (2005-08-19) Copyright 2004-2005, Dean Edwards * * License: http://creativecommons.org/licenses/LGPL/2.1/ * * Ported to PHP by Nicolas Martin. * * ---------------------------------------------------------------------- * changelog: * 1.1 : correct a bug, '\0' packed then unpacked becomes '\'. * ---------------------------------------------------------------------- * * Changes: * 2014-08-28: grkalik: change class for composer support. no functionality change. *
 */
 
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