合并js请求

//页面保存为js.php
//前台请求范例http://localhost/js.php?f=1,2
//请求1.js,2.js两个文件
<?PHP
header("Content-Type:application/x-javascript");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: max-age=".(86400*30));
header("Expires: " .gmdate("D, d M Y H:i:s",time()+86400*30). " GMT");

if($_GET['f'])
{
 $url = parse_url($_SERVER['REQUEST_URI']);
     
 $arr_f = array_unique(explode(',',preg_replace("/\.+\//",'',$_GET['f'])));

 foreach($arr_f as $v)
 {
  if(!empty($v))
  {
   include('./'.$v.'.js');
   echo "\n";
  }
 }
}
?>