On the PayPalTech.com site today, there's some new code posted to help you (yes, you) make an encrypted web payment with PHP via some "encrypted buttons".

The page is pretty much just the source for the application, but they do explain how to get it all running with a few simple steps near the end.

It doesn't look too overly complicated, but it's great to have it in a format that as easy as this to just drop into a pre-existing web application...