Available from version 1.11.0
Removed in version 1.32.0 (Gerrit change 465784)
Dynamically adds to or removes from the list of available groups.
Define function:
public static function onUserGetImplicitGroups( &$aGroups ) { ... }
Attach hook: In extension.json:
	"Hooks": {
		"UserGetImplicitGroups": "MediaWiki\\Extension\\MyExtension\\Hooks::onUserGetImplicitGroups"
Called from: File(s): User.php
Interface: UserGetImplicitGroupsHook.php

For more information about attaching hooks, see Manual:Hooks .
For examples of extensions using this hook, see Category:UserGetImplicitGroups extensions.

Use cases[edit]

This hook may be used as part of an extension that synchronizes the list of available groups with external applications or the host operating system.

Implementation background[edit]

MediaWiki supports the assignment of group-based user rights. The list of available groups is defined by three sources: groups hard coded into MediaWiki (*, user, autoconfirmed, emailconfirmed), the keys of the $wgGroupPermissions configuration variable and the groups added or filtered by this hook.


Implementers return a list of groups that should be added. The source for the list may be a hard coded list, a file, a database table, a third party application, or anything else a programmer's imagination can dream up.