php实现对css文件进行压缩和解压缩

$string = trim(stripslashes($_POST['code'])); //stripslashes()函数删除转义字符（反斜杠）

if(!empty($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

$string = str_replace("rn","",$string); //首先去掉换行

$string = preg_replace("/(s*{s*)/","{",$string);

$string = preg_replace("/(s*;s*}s*)/","}",$string); //去掉反括号首位的空格和换行，和最后一个;

$string = preg_replace("/(s*;s*)/",";",$string);

return $string;

}

function css_decompress($string){

//解压

$string = css_compress($string); //为了效果更好，解压前，先压缩至最简状态

$string = str_replace("{","rn{rnt",$string);

$string = str_replace("}","rn}rnrn",$string); 

$string = str_replace(";",";rnt",$string);

$string = str_replace("*/","*/rn",$string);

return $string;

}

?>