I'm a new ViArt user trying to implement this cart for a literary magazine which is wanting to sell hadrcopy backissues, digital backissues (PDFs), digital audio, and accept contest submissions with an entry fee. We're also interested in setting up online "subscriptions" to the catalog of audio recordings.
Right now, I'm trying to figure out how to execute some PHP code (to make changes to certain database records) after a customer has purchased a particular product (like the contest submission or an specific content membership). Reading some of the other forum posts where people have used ViArt with paid-membership-type sites, it sounds like this is possible, but I can't find where it would happen. Is there some kind of customization to the confirmation page that can be done? How can I link it to recognizing the change of order status to "paid"?