本文實(shí)例講述了PHP實(shí)現(xiàn)動(dòng)態(tài)壓縮js與css文件的方法。分享給大家供大家參考,具體如下:
正式發(fā)布產(chǎn)品時(shí),我們希望將項(xiàng)目里的js,css合并壓縮,以減少http請(qǐng)求、防止輕易查看源代碼。
使用
只需要在頭部引入一下代碼即可:
meta charset="utf-8"/>
title>demo/title>
?php
//定義需要壓縮的文件
$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 ?>" rel="external nofollow" >
script src="?php echo $js_path ?>">/script>
!--下面可以繼續(xù)放不能壓縮或者不想壓縮的文件-->
script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js">/script>
這段代碼會(huì)在指定的目錄(例如common/)里生成壓縮過后的js和css.每次更新了js,css內(nèi)容,請(qǐng)先刪除生成的壓縮文件。
示例:
4e387d5edce14cc2bd6396f6ebb7921b.css
7c10211f113f3175489196d336d67734.js
注意:
編寫的css和js文件一定要符合規(guī)范。例如一定要加分號(hào)。js的function可以不加分號(hào)。
引用的資源
/**
* 合并壓縮css
*/
function parse_css($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); //清除換行符
$css_content = str_replace("\n", '', $css_content); //清除換行符
$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 $css_url;
}
/**
* 合并壓縮js
*/
function parse_script($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;
}
項(xiàng)目里引用到第三方類庫JavaScriptPacker可以在github下載:
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.
*
*/
PS:這里再為大家推薦幾款相似的在線工具供大家參考:
JavaScript壓縮/格式化/加密工具:
http://tools.jb51.net/code/jscompress
在線CSS代碼壓縮、格式化工具:
http://tools.jb51.net/code/css
更多關(guān)于PHP相關(guān)內(nèi)容感興趣的讀者可查看本站專題:《php文件操作總結(jié)》、《PHP目錄操作技巧匯總》、《PHP基本語法入門教程》、《PHP運(yùn)算與運(yùn)算符用法總結(jié)》、《php字符串(string)用法總結(jié)》、《PHP數(shù)組(Array)操作技巧大全》、《PHP數(shù)據(jù)結(jié)構(gòu)與算法教程》及《php程序設(shè)計(jì)算法總結(jié)》
希望本文所述對(duì)大家PHP程序設(shè)計(jì)有所幫助。
您可能感興趣的文章:- php實(shí)現(xiàn)壓縮多個(gè)CSS與JS文件的方法
- php壓縮HTML函數(shù)輕松實(shí)現(xiàn)壓縮html/js/Css及注意事項(xiàng)
- 將PHP程序中返回的JSON格式數(shù)據(jù)用gzip壓縮輸出的方法
- php使用gzip壓縮傳輸js和css文件的方法
- php實(shí)現(xiàn)壓縮合并js的方法【附demo源碼下載】
- php壓縮多個(gè)CSS為一個(gè)css的代碼并緩存
- php簡(jiǎn)單壓縮css樣式示例