I just spend couple hours yesterday, 23rd Nov 2010 to convert PHP library of Authorize.NET to be able to use SIM and DPM payment methods. It works just fine. Have defn. parts to optimize the code a lot better, like using static methods etc.. but it was just a quick conversion, be my guest to change it, and contribute..
You can find my code at http://code.google.com/p/authorizepy/
check HOWTO for code examples.
Direct Post Method
Direct Post Method allows developers to fully customize the experience of the entire payment flow, while simplifying PCI compliance.
The Authorize.Net Payment Gateway handles all the steps in the secure transaction while remaining virtually transparent.
- Customer data is protected with 128-bit SSL encryption.
- Digital fingerprints enhance security, providing multiple layers of authentication.
