'ArticlePageDataBefore': Before loading data of an article from the database.
&$wikiPage: WikiPage (object) that data will be loaded
&$fields: fields (array) to load from the database
+&$tables: tables (array) to load from the database
+&$joinConds: join conditions (array) to load from the database
'ArticlePrepareTextForEdit': Called when preparing text to be saved.
$wikiPage: the WikiPage being saved
$terms: String of the search terms entered
$specialSearch: The SpecialSearch object
&$query: Array of query string parameters for the link representing the search result.
+&$attributes: Array of title link attributes, can be modified by extension.
'SidebarBeforeOutput': Allows to edit sidebar just before it is output by skins.
Warning: This hook is run on each display. You should consider to use