How to dynamically compress js and css files using PHP-PHP Tutorial-php.cn

这篇文章主要介绍了关于PHP实现动态压缩js与css文件的方法，有着一定的参考价值，现在分享给大家，有需要的朋友可以参考一下

本文实例讲述了PHP实现动态压缩js与css文件的方法。分享给大家供大家参考，具体如下：

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：

 demo

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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

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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; }

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

gkralik/php-uglifyjs
https://github.com/gkralik/php-uglifyjs

/** * 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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