Ulgly 3 - A flawless logic is a security feature

    if(isset($_POST['redirect']) || isset($_GET['redirect'])){
        if (isset($_POST['redirect']) && !empty($_POST['redirect'])) {
            $var = $_POST['redirect'];
        }
        else if (isset($_GET['redirect']) && !empty($_GET['redirect'])) {
            $var = $_GET['redirect'];
        }
        else
            $var="";
        if(!empty($var))header("location: $var");
    }