APPNET OS Evil Extends is one of the most powerful features in APPNET OS.
This makes it possible to extend every PHP class in the complete system.
Each class can be overwritten multiple times by apps.
The override is applied backwards recursively.
The loading sequence of the extensions can be adjusted via the APPNET OS administration area.
The loading sequence is written in the custom/extends.php file and is already applied before the classes are loaded for the first time.
This makes it possible to expand all core classes without having to change them.
This file is used as a header when creating the custom/extends.php file.