Disclaimer: This is a technical explaination and is geared towards developers. A working knowledge of PHP, OOP, and MVC is assumed.
What is the XenForo Class Proxy System?
In a nutshell, this system allows several add-ons to extend the same class within XenForo using its code event listener...
Helpers provide extra functions that you can use inside the XenForo templates.
Currently there are many Helpers, following some them:
avatar -> Helper to fetch the URL of a user's avatar.
username -> Produces a <a href="members/username.123" class="username">Username</a> snippet.
usertitle ->...