WHMCS Sample Merchant Gateway Module

Summary

Payment Gateway modules allow you to integrate payment solutions with the WHMCS platform.

There are two types of gateway module:

• Third Party Gateways - these are payment solutions where checkout occurs on a remote website, usually hosted by the payment gateway themselves.

• Merchant Gateways - these are payment solutions where credit card details are collected - usually within the WHMCS application, though more and more often this will be done remotely, typically via an iframe, with a page hosted remotely by the payment gateway enabling tokenised storage.

The sample files here demonstrate how we suggest a Merchant Payment Gateway module for WHMCS be structured and implemented.

For more information, please refer to the documentation at: https://developers.whmcs.com/payment-gateways/

Recommended Module Content

The recommended structure of a merchant gateway module is as follows.

 modules/gateways/
  |- callback/merchantgateway.php
  |  merchantgateway.php

Minimum Requirements

For the latest WHMCS minimum system requirements, please refer to https://docs.whmcs.com/System_Requirements

We recommend your module follows the same minimum requirements wherever possible.

Useful Resources

• Developer Resources
• Hook Documentation
• API Documentation

WHMCS Limited