<?php
$url = isset($_REQUEST['url']) ? $_REQUEST['url'] : '';
if(preg_match('#(http?|ftp)://\S+[^\s.,>)\];\'\"!?]#i',$url)){
sleep(0);
}
?>
http://test.ru/dw/?url=https://backit.me/ru/cashback?inviter=002mgt7&ref_type=epnbz
https://backit.me/ru/cashback?inviter=002mgt7