You might be interested in taking a look at my PayPal library that includes pretty much every call they offer in the NVP API as well as Adaptive Payments.
phpclasses.org/package/7207-PHP-Pro ...
Of course, it also includes the RefundTransaction and Refund (Adaptive Payments) API's.
Just figured I'd throw it at you because it would probably save you loads of time over continuing to build this on your own.
Andrew Angell - 2012-01-10 07:50:09
