$cachefile = "cache/$gen_user-$id-rss.xml";
	$cachetime = 10 * 60; // 5 minutes
      	if (file_exists($cachefile) && (time() - $cachetime
        < filemtime($cachefile)))
      	{
    	$xml = file_get_contents("$cachefile");
     	echo "$xml";
        echo "<!-- Page auto updates every 10 mins -->";
        echo "<!-- Cached ".date('jS F Y H:i', filemtime($cachefile))." -->";
	exit;
	}
	ob_start();



//code here




	$fp = fopen($cachefile, 'w');
   	fwrite($fp, ob_get_contents());
        fclose($fp);
        ob_end_flush();