if (isset($_POST['submit'])) {
    $fname = $_POST['fname'];
    $lname = $_POST['lname'];
    $phone = $_POST['phone'];
    $id_num = $_POST['id_num'];
    $email = $_POST['email'];
    $business = $_POST['business'];
    $joined = $_POST['joined'];
    if (empty($fname) || empty($lname) || empty($phone) || empty($id_num) || empty($joined)) {
        $err = "Form fields marked with an asterix are required";
    } else {
        // Continue with processing
        $prop_id = (int) $session->sessionVar("prop_id");
        $room_id = (int) $session->sessionVar("room_id");
        $tenant = new Tenant();
        $tenant->setPropertyId($prop_id);
        $tenant->setRoomId($room_id);
        $tenant->setFirstName($fname);
        $tenant->setLastName($lname);
        $tenant->setPhoneNumber($phone);
        $tenant->setNationalIdNumber($id_num);
        if (!empty($email)) {
            $tenant->setEmail($email);
        }
        if (!empty($business)) {
            $tenant->setBusinessName($business);
        }
        $tenant->setDateJoined($joined);
        #echo var_dump($tenant);
        if ($tenant->createNewTenant($room_id)) {
            $session->message("Tenant added");