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.
代码如下:
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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- <html xmlns="http://www.w3.org/1999/xhtml">
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- <head>
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- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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- </head>
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- <?php
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- $string = trim(stripslashes($_POST['code']));
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- if(!emptyempty($string)){
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- if($_POST['method'] == '压缩' ){
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- $string = css_compress($string);
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- }elseif($_POST['method'] == '解压缩' ){
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- $string = css_decompress($string);
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- }
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- }else{
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- $string = '';
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- }
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- function css_compress($string){
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-
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- $string = str_replace("\r\n","",$string);
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- $string = preg_replace("/(\s*\{\s*)/","{",$string);
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- $string = preg_replace("/(\s*\;\s*\}\s*)/","}",$string);
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- $string = preg_replace("/(\s*\;\s*)/",";",$string);
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- return $string;
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- }
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- function css_decompress($string){
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-
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- $string = css_compress($string);
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- $string = str_replace("{","\r\n{\r\n\t",$string);
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- $string = str_replace("}","\r\n}\r\n\r\n",$string);
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- $string = str_replace(";",";\r\n\t",$string);
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- $string = str_replace("*/","*/\r\n",$string);
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- return $string;
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- }
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- ?>
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- <body>
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- <div style="width:800px;height:500px;text-align:center">
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- <p><strong>请将css代码粘贴到下面框中,然后选择压缩/解压缩</strong></p>
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- <form action="" method="post" name="css_code">
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- <textarea style="width:90%;height:460px;padding:5px;" name="code"><?php echo $string; ?></textarea>
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- <br />
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- <input type="submit" name="method" value="压缩" />
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- <input type="submit" name="method" value="解压缩" />
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- </form>
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- </div>
- </body>
- </html>
