View file stat/_core/_inc/user.php
<?php
if (isset($_COOKIE['CK'])):
$CK = system::check($_COOKIE['CK']);
$user = cache_user::check($CK);
if ($user['CK'] != $CK || $user['ban'] == 1):
setcookie("CK", "", time() - 2419200, "/", "".domain."");
system::header('/');
endif;
endif;
?>