Available from version 1.20.0 (Gerrit change 26743)
When building information to display on the action=info page
Define function:
public static function onInfoAction( IContextSource $context, array &$pageInfo ) { ... }
Attach hook: In extension.json:
	"Hooks": {
		"InfoAction": "MediaWiki\\Extension\\MyExtension\\Hooks::onInfoAction"
Called from: File(s): actions/InfoAction.php
Interface: InfoActionHook.php

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

Details edit

  • $context: IContextSource object
  • &$pageInfo: Array of information

$pageInfo is an array of info groups (with string key; the section title for the group will be taken from the plaintext message pageinfo-$key). Each info group is an array of info items (with numeric keys). Each info item is a two-element array (with numeric keys); the first element is the type of the information, the second the value. Both can be strings or HTML messages.

The info group keys used by core are: header-basic, header-edits, header-restrictions, header-properties, category-info. Extensions can extend those groups or add new ones.