// set message
            $_SESSION["message"] = $mssg;
        } else {
            // then get message
            return $this->message;
        }
    }
    private function CheckloggedIn()
    {
        if (isset($_SESSION['customer_number'])) {
            $this->customer_number = $_SESSION["customer_number"];
            $this->loggedIn = True;
        } else {
            unset($this->customer_number);
            $this->loggedIn = False;
        }
    }
    private function CheckMessage()
    {
        if (isset($_SESSION["message"])) {
            // add it as an attribute and erase the stored version.
            $this->message = $_SESSION["message"];
            unset($_SESSION["message"]);
        } else {
            $this->message = "";
        }
    }
}
$session = new Session();
$message = $session->Message();