I'm looking to do Authorize.net payment integration with a website using PHP.
My questions are:
1) Where I can find a tutorial, development guide, and/or code samples for doing this with PHP.
2) Is it possible to obtain a test account to do the integration like Paypal's sandbox, or does one need to have a live account to which you can pass an additional parameter to indicate the transaction is a test one?
All other advice will also be helpful. Thanks!