View file fr4.php

<?
if (eregi("[^0-9]", $usid))
{exit;}

if (eregi("[^a-zA-Z0-9_-]", $a))
{exit;}
header("Cache-Control: no-cache");
header("Content-type: image/gif");
if (!isset($a)) readfile("loadavatars/$usid.gif");
else readfile("avatars/$a.gif");
?>