I am missing something really simple…

I am testing with a sandbox account. IPN is configured properly, as I see the transactions captured by your plugin in the admin panel.

Now I’d like to use your sample code to kick off some emails, add a few fields to a database, etc.

I’ve got your sample code pasted into my theme’s functions.php file. I added known working code to fire off an email at the appropriate point in the function.

What I don’t understand is how this function gets triggered. Do I need to reference the hook name somewhere so this code is run whenever paypal talks to the IPN link?

https://wordpress.org/plugins/paypal-ipn/