Linkpoint Integration

[studebaker]

I've done the basics (loaded linkpoint api, opened port 1129, secure cart using shared SSL), now in test mode and get Success message even on dummy credit cards, no error messages reported.

Looking for suggestions on how to figure out the problem and fix.

Is there some way to see what the cart is passing to linkpoint, and to see what linkpoint is returning?

Code seems to execute fine, but I need some way to see that is happening (or not happening) as it executes. Is there some debugger mode for php?

thanks