PHP根据传入参数合并多个JS和CSS文件的简单实现

 $str = str_replace("\t", "", $str); //清除空格
 $str = str_replace("\r\n", "", $str); 
 $str = str_replace("\n", "", $str);

 // 删除单行注释
 $str = preg_replace("/\/\/\s*[a-zA-Z0-9_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/", "", $str); 
 // 删除多行注释
 $str = preg_replace("/\/\*[^\/]*\*\//s", "", $str);

 echo $str;
}

//输出CSS
header ("content-type:text/css; charset: utf-8");
if(isset($_GET)) {
 $files = explode(",", $_GET[‘get‘]);
 $fc = ‘‘;
 foreach ($files as $key => $val){
  $fc .= file_get_contents($_GET[‘path‘].$val.".css");
 } 
 $fc = str_replace("\t", "", $fc); //清除空格
 $fc = str_replace("\r\n", "", $fc); 
 $fc = str_replace("\n", "", $fc); 
 $fc = preg_replace("/\/\*[^\/]*\*\//s", "", $fc); 
 echo $fc; 
}