the defaults.
&$namespaces: Array of namespace numbers with corresponding canonical names
+'CategoryAfterPageAdded': After a page is added to a category.
+$category: Category that page was added to
+$wikiPage: WikiPage that was added
+
+'CategoryAfterPageRemoved': After a page is removed from a category.
+$category: Category that page was removed from
+$wikiPage: WikiPage that was removed
+
'CategoryPageView': Before viewing a categorypage in CategoryPage::view.
$catpage: CategoryPage instance
Title::isCssOrJsPage().
'TitleIsAlwaysKnown': Called when determining if a page exists. Allows
-overriding default behaviour for determining if a page exists. If $isKnown is
+overriding default behavior for determining if a page exists. If $isKnown is
kept as null, regular checks happen. If it's a boolean, this value is returned
by the isKnown method.
$title: Title object that is being checked