I'm using the Shopp Plugin, and basically, I need to send an email to a unique email address field that I've created on the front end. The transaction has to complete fully before sending it. I mean, money has to have been transferred successfully, etc. I've attached the fields to a particular set of products, and I can move the data between pages (via $_POST of course), ie; Product -> Cart -> Checkout... It's after this that's the problem. Landing on the Thank you page or whatever, I don't have access to the finalized list of items that were bought, via the $_POST method. Could someone point me in the right direction? Thanks
Seems like an awkward way to go about this. Can't you use the shopp_order_notifications filter?
Take a look at https://shopplugin.net/api/shopp_order_notifications/ for the docs.