PHP压缩javascritp 与CSS的例子
有的网站有很多的 CSS 文件,如果将它们合并到一起并且进行 Gzip 压缩会减少请求和文件大小,有利于提高网站加载速度。为了方便我不推荐人工压缩和合并 CSS,而是使用 PHP 代码。
首先将所有 CSS 放到一个目录里,然后在此目录新建一个空的 CSS 文件,命名为 css.php,其实除了后缀命名随便.然后在 PHP 文件里放下边的代码:
<?php header('Content-type: text/css'); ob_start("compress"); function compress($buffer) { $buffer = preg_replace('!/*[^*]**+([^\/][^*]**+)*/!', '', $buffer); $buffer = str_replace(array( "\r\n", "\r", "\n", "\t", ' ', ' ', ' ' ) , '', $buffer); return $buffer; } /*include('colorpicker.css'); include('jquery-ui.css'); include('style.css'); include('switchery.min.css');*/ foreach (glob("*.css") as $filename) include $filename; ob_end_flush(); ?>
引入 CSS 文件的代码换成引入这个 PHP 文件,例如:
<link rel='stylesheet' id='style-css' href='/css/css.php' type='text/css' media='all' />
压缩多个css为一个css,代码如下:
/* Compress multiple CSS files into one and cache for an hour. Use the same code for Javascript, but replace below "text/css" with "text/javascript" and of course make sure you include .js files instead of .css ones. */ ob_start("ob_gzhandler"); header("Content-type: text/css; charset: UTF-8"); header("Expires: ".gmdate("D, d M Y H:i:s", time() + 60*60)." GMT"); include('somefile.css'); echo "nn"; include('anotherfile.css'); echo "\n\n"; ob_flush();
下面整理可压缩css,js的函数,代码如下:
<?php /** * 合并css样式为一个文件 * * @param unknown_type $urls * @param unknown_type $path * @param unknown_type $tmpl_path * @return unknown */ function parse_css($urls, $path = "./static/", $tmpl_path = '.') { $url = md5(implode(',', $urls)); $css_url = $path . $url . '.css'; if (!file_exists($css_url)) { if (!file_exists($path)) mkdir($(www . phprm . com) path, 0777); $css_content = ''; foreach ($urls as $url) { $css_content.= @file_get_contents($url); } $css_content = preg_replace("/[rn]/", '', $css_content); $css_content = str_replace("../images/", $tmpl_path . "/images/", $css_content); @file_put_contents($css_url, $css_content); } return $css_url; } /** * 合并js为一个文件 * * @param unknown_type $urls * @param unknown_type $path * @return unknown */ function parse_script($urls, $path = "./static/") { $url = md5(implode(',', $urls)); $js_url = $path . $url . '.js'; if (!file_exists($js_url)) { if (!file_exists($path)) mkdir($path, 0777); require_once "inc/javascriptpacker.php"; $js_content = ''; foreach ($urls as $url) { $append_content = @file_get_contents($url) . "rn"; $packer = new JavaScriptPacker($append_content); $append_content = $packer->pack(); $js_content.= $append_content; } @file_put_contents($js_url, $js_content); } return $js_url; } ?>
前台js调用:
<?php $pagejs[] = $tplurl . "js/jump.js"; $jsfile = parse_script($pagejs, "./template/default/js/", "."); ?> <script type="text/javascript" src="<?php echo $jsfile;?>"></script>
前台css调用:
<?php $pagecss[] = $tplurl . "style/index_top.css"; $pagecss[] = $tplurl . "style/index.css"; $cssfile = parse_css($pagecss, "./template/default/style/", "."); ?> <link rel="stylesheet" type="text/css" href="<?php echo $cssfile;?>" />
PHP 文件里就包含了所有被压缩的 CSS 代码,而且可以自动引入 CSS 目录里的所有 CSS 文件,不用在新建 CSS 文件的时候再修改这个 PHP 文件.
教程地址:http://www.phprm.com/develop/fs3403.html
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