CI: Authorize.net (or other?)

I'm looking for some guidance from those that may have integrated Authorize.net into a CI application (or any PHP MVC for that matter), and/or if there are other payment processing offerings you would suggest.

In particular, does anyone have examples/can point me in the right direction of implementing Authorize.net's DPM within an MVC PHP application? My relay_response_url is set to a controller within my application, which is to then redirect it to a view for displaying the relevant success/error message(s). But when I point DPM towards my controller, it errors out as I assume its expecting to immmediately put out a response, rather than being funneled thru?

Is DPM the solution to use? Regardless, how should I capture the respons开发者_运维技巧e from Auth.net in my controller and then pass it along to my view(s)?

Thanks!

I would check out this payment library, as it will most likely simplify your life greatly...

http://getsparks.org/packages/codeigniter-payments/versions/HEAD/show