下面用php实现了一个对css进行压缩和解压缩的小程序,暂不适用于js的操作,通过这个案例可以学习php字符替换和正则替换的技术.
将css代码压缩能够减小文件的体积,从而减小了网络传输量和带宽占用,减小了服务器的处理的压力.
代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<?php
$string = trim(stripslashes($_POST['code'])); //stripslashes()函数删除转义字符(反斜杠)
if(!emptyempty($string)){
if($_POST['method'] == '压缩' ){
$string = css_compress($string);
}elseif($_POST['method'] == '解压缩' ){
$string = css_decompress($string);
}
}else{
$string = '';
}
function css_compress($string){
//压缩
$string = str_replace("/r/n","",$string); //首先去掉换行
$string = preg_replace("/(/s*/{/s*)/","{",$string);
$string = preg_replace("/(/s*/;/s*
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