function RefreshHit($parameter,$ip){        session_start();        $allowTime = 1800;        $allowT = md5($ip.$parameter);        if(!isset($_SESSION[$allowT])){            $refresh = true;            $_SESSION[$allowT] = time();        }elseif(time() - $_SESSION[$allowT]>$allowTime){            $refresh = true;            $_SESSION[$allowT] = time();        }else{            $refresh = false;        }        return $refresh;    }