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> <html> <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("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; } ?> <body> <div style="width:800px;height:500px;text-align:center"> <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> <form action="" method="post" name="css_code"> <textarea style="width:90%;height:460px;padding:5px;" name="code"><?php echo $string; ?> </textarea> <br /> <input type="submit" name="method" value="压缩" /> <input type="submit" name="method" value="解压缩" /> </form> </div> </body> </html>
文章链接:http://www.phprm.com/develop/fs3520.html
随便收藏,请保留本文地址!