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Available from version 1.4.3
Called before viewing a categorypage in CategoryPage::view
Define function:
public static function onCategoryPageView( &$categoryArticle ) { ... }
Attach hook:

In extension.json:

	"Hooks": {
		"CategoryPageView": "MyExtensionHooks::onCategoryPageView"

For MediaWiki ≤1.25:

$wgHooks['CategoryPageView'][] = 'MyExtensionHooks::onCategoryPageView';
Called from:File(s): CategoryPage.php

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


  • $categoryArticle: CategoryPage instance (CategoryPage is a subclass of Article)

If this method returns false, then the default behavior of CategoryPage::view will be skipped.


  • If there is a diff and $diffOnly is set, then the diff would be displayed and this hook won't be reached.
  • This hook is never accessed when previewing a page. The category listing is generated via EditPage::showPreview() instead of CategoryPage:view().
  • An alternative way to modify the appearance of a category page is to use the ArticleFromTitle hook, and create a new Article object using a custom class derived from CategoryPage. This method allows the category page to be customized in both preview and standard view mode. See the CategoryTree extension for an example.