“order lost” in X-Cart in return section of payment module

Question

I wrote a payment module for X-Cart.
My return url section is:

require './auth.php';

if (!func_is_active_payment('cc_mellat.php'))
    exit;

$rescode=$_POST['ResCode'];
$RefID=$_POST['RefId'];
$saleOrderId=$_POST['saleOrderId'];
$SaleReferenceId=$_POST['SaleReferenceId'];

$tmp = func_query_first("SELECT sessionid,param1 FROM $sql_tbl[cc_pp3_data] WHERE ref='".$saleOrderId."'");
$bill_output['sessid'] = $tmp['sessionid'];

$bill_output['billmes']="RefId:".$RefId." - ResCode: ".$rescode." - SaleReferenceId:".$SaleReferenceId;
// Approved
if ($rescode == 0 && $is_md5) {
    $bill_output['code'] = 1;       
// Declined
} else {
    echo "Error: ".$rescode;
    $bill_output['code'] = 2;       
}
var_dump($bill_output); 

require($xcart_dir.'/payment/payment_ccend.php');

but after payment X-Cart says:

Order declined.
Review your data or contact the store administrator.

Reason: Error: Your order was lost 

What is the problem?

Answer 1

It seems you use undefined variable $is_md5 here:

if ($rescode == 0 && $is_md5) {

Answer 2

See my post here. It fails due to a SQL error because the name of the xcart_cc_pp3_data field is sessid not sessionid.

Switch to the correct field name, and your order will be found. (I had the same order not found error until I found & fixed the SQL.)