• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.

Event listener for group change?

So, I'm very very new to coding with xenforo so feel free to provide as much detail as possible :)

Basically, I want to run some code when a user's group is changed(irregardless of how it is changed)

I'm assuming I need to create a listener(Need help doing this)
Also assuming I need to create a class that the listener adds to the group change event(Not sure how to do this)
I will also need to get the following from the user:
Their new group
A custom field value

And I don't know how to do either of those either.

I'm not new to PHP though, so just the most simple example should get me going, thanks!