用PHP在服务端合并多个JS和CSS文件减少HTTP请求，提高速度

//输出JS
header ("Content-type:Application/x-javascript; Charset: utf-8");
if(isset($_GET)) {
$files = explode(",", $_GET['get']);
$str = '';
foreach ($files as $key => $val){
$str .= file_get_contents($_GET['path'].$val);
}
$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; 
}