$Addonpayable = 0;
$Downpayment = $_POST['downpayment'];
$Amount = $_POST['amount'];
if (empty($Roomid)) {
    echo 'Room Number is required';
} else {
    if (empty($FirstName)) {
        echo 'First Name is required';
    } else {
        if (empty($LastName)) {
            echo 'Last Name is required';
        } else {
            if (empty($Contact)) {
                echo 'Contact Number is required';
            } else {
                if (empty($Arrival)) {
                    echo 'Start Date  is required';
                } else {
                    if (empty($Departure)) {
                        echo 'End Date is required';
                    } else {
                        $walkin = new Walkin($Roomid, $Categoryname, $FirstName, $LastName, $Contact, $fromdate, $todate, $Numberofdays, $Status, $Addonpayable, $Downpayment, $Amount);
                        if ($walkin->AddWalkin()) {
                            echo 'true';
                        }
                    }
                }
            }
        }
    }
}