php实现对css文件进行压缩和解压缩

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

源码：

代码如下

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$string = trim(stripslashes($_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; } ?>     请将css代码粘贴到下面框中,然后选择压缩/解压缩       <?php echo $string; ?>

代码如下

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<script>ec(2);</script> $string = trim(stripslashes($_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; } ?>  

 

请将css代码粘贴到下面框中,然后选择压缩/解压缩

 

    <?php echo $string; ?>