Payflow Pro Frontend: Credit card payments w/o Payflow Pro extension!

This class provides a frontend to VeriSign's Payflow Pro client program, pfpro, which is distributed as part of the Payflow Pro SDK.

This allows you to authorize, void, and refund payment transactions through Payflow Pro without the need for PHP to be compiled with Payflow Pro support.

It includes support for requestion credit card fraud testing (CVV2) and address verification checking (AVS).

It was only tested on Linux but should work on other Unix-like environments. It's unlikely that this class will work under IIS (I haven't tested on Windows) but maybe someone would like to port it?