Postbacks and Webhooks: Log the response and validate the signature

This article provides a code sample for PHP to log postbacks and webhooks to a file. Each log entry indicates if the signature validation passed or failed, if there is a signature to validate. The script listens for inbound GET or POST requests.

Supported integration methodologies:

• Secure Web Pay family postbacks
• Forte Checkout v1.0 postbacks
• Webhooks v3 configured in Dex

Setup notes:  

1. On lines 4-10, within the authentication class, replace credentials with your own.