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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