- hash: documentation ( source)
- error_reporting: documentation ( source)
- md5: documentation ( source)
<?php
error_reporting(0);
$s1 = $_GET[md5($_SERVER['REMOTE_ADDRESS'])];
$s2 = $_GET[md5($_SERVER['HTTP_USER_AGENT'])];
if ($s1!=$s2) return;
if (md5($s1)===hash('md5',$s2)) return;
?>