Manual:Hooks

Hooks allow custom code to be executed when some defined event (such as saving a page or a user logging in) occurs. For example, the following code snippet will trigger a call to the function MyExtensionHooks::pageContentSaveComplete whenever the PageContentSaveComplete hook runs, passing it function arguments specific to PageContentSaveComplete :

$wgHooks['PageContentSaveComplete'][] = 'MyExtensionHooks::pageContentSaveComplete';

MediaWiki provides many hooks like this to extend the functionality of the MediaWiki software. Assigning a function (known as an event handler) to a hook will cause that function to be called at the appropriate point in the main MediaWiki code, to perform whatever additional task(s) the developer thinks would be useful at that point. Each hook can have multiple handlers assigned to it, in which case it will call the functions in the order that they are assigned, with any modifications made by one function passed on to subsequent functions in the chain.

Assign functions to hooks at the end of LocalSettings.php or in your own extension file at the file scope (not in a $wgExtensionFunctions function or the ParserFirstCallInit hook). For extensions, if the hook function's behavior is conditioned on a setting in LocalSettings.php, the hook should be assigned and the function should terminate early if the condition was not met.

You can also create new hooks in your own extension; if you do so, add them to the Special:MyLanguage/Extension hook registry.

Background

A hook is triggered by a call to the function Hooks::run (described in file hooks.txt, and defined in GlobalFunctions.php). The first argument to Hooks::run is the name of the hook, the second is the array of arguments for that hook. It will find the event handlers to run in the array $wgHooks. It calls the PHP function call_user_func_array with arguments being the function to be called and its arguments.

See also the hook specification in core.

In this example from the doEditContent function in WikiPage.php, doEditContent calls Hooks::run to run the PageContentSaveComplete hook, passing $hook_args as argument:

	Hooks::run( 'PageContentSaveComplete', $hook_args );

The Special:MyLanguage/core calls many hooks, but Special:MyLanguage/extensions can also call hooks.

Writing an event handler

An event handler is a function you assign to a hook, which will be run whenever the event represented by that hook occurs. It consists of:

• a function with some optional accompanying data, or
• an object with a method and some optional accompanying data.

Register the event handler by adding it to the global $wgHooks array for a given event. Hooks can be added from any point in the execution before the hook is called, but are most commonly added in LocalSettings.php, its included files, or, for extensions, in the file extension.json. All the following are valid ways to define a hook function for the event EventName that is passed two parameters, showing the code that will be executed when EventName happens:

Format	Syntax	Resulting function call.
Static function	$wgHooks['EventName'][] = 'MyExtensionHooks::onEventName';	MyExtensionHooks::onEventName( $param1, $param2 );
Function, no data	$wgHooks['EventName'][] = 'someFunction';	someFunction( $param1, $param2 );
Function with data	$wgHooks['EventName'][] = array( 'someFunction', $someData );	someFunction( $someData, $param1, $param2 );
Function, no data (weird syntax, but OK)	$wgHooks['EventName'][] = array( 'someFunction' );	someFunction( $param1, $param2 );
inline anonymous function	$wgHooks['EventName'][] = function( $param1, $param2 ) {   ... function body };	(the anonymous function is called with the hook's parameters)
Object only	$wgHooks['EventName'][] = $object;	$object->onEventName( $param1, $param2 );
Object with method	$wgHooks['EventName'][] = array( $object, 'someMethod' );	$object->someMethod( $param1, $param2 );
Object with method and data	$wgHooks['EventName'][] = array( $object, 'someMethod', $someData );	$object->someMethod( $someData, $param1, $param2 );
Object only (weird syntax, but OK)	$wgHooks['EventName'][] = array( $object );	$object->onEventName( $param1, $param2 );

For extensions, the syntax is similar in the file extension.json (corresponding to the first and second case above):

{
	"Hooks": {
		"EventName": [
			"MyExtensionHooks::onEventName",
			"someFunction"
		]
	}
}

When an event occurs, the function (or object method) that you registered will be called the event's parameters along with any optional data you provided at registration. Note that when an object is the hook and you didn't specify a method, the method called is 'onEventName'. For other events this would be 'onArticleSave', 'onUserLogin', etc.

The optional data is useful if you want to use the same function or object for different purposes. For example:

$wgHooks['PageContentSaveComplete'][] = array( 'ircNotify', 'TimStarling' );
$wgHooks['PageContentSaveComplete'][] = array( 'ircNotify', 'brion' );

This code would result in ircNotify being run twice when a page is saved: once for 'TimStarling', and once for 'brion'.

Event handlers can return one of three possible values:

• no return value (or null): the hook handler has operated successfully. (Before MediaWiki 1.23, returning true was required.)
• "some string": an error occurred; processing should stop and the error should be shown to the user
• false: the hook handler has done all the work necessary, or replaced normal handling. This will prevent further handlers from being run, and in some cases tells the calling function to skip normal processing.

In many cases where an error message is expected, the hook will define a variable passed as a reference for extensions to store an error message and this is preferred over returning a string that will simply be displayed as an "internal error."

The last result would be for cases where the hook function replaces the main functionality. For example, if you wanted to authenticate users to a custom system (LDAP, another PHP program, whatever), you could do:

$wgHooks['UserLogin'][] = array( 'ldapLogin', $ldapServer );

$ldap['server'] = "ldaps://ldap.company.com/";
$ldap['port'] = 636;
$ldap['base'] = ",ou=Staff,dc=company,dc=com";

function ldapLogin( $username, $password ) {
	global $ldap;
	$auth_user = "uid=" . $username . $ldap[ 'base' ];
	wfSupressWarnings();
	if ( $connect = ldap_connect( $ldap[ 'server' ], $ldap[ 'port' ] ) ){
		if ( $bind = ldap_bind( $connect, $auth_user, $password ) ){
			ldap_close( $connect );
			return true;
		} else { // if bound to ldap
			echo 'Error on ldap_bind';
		}
	} else { // if connected to ldap
		echo 'Error on ldap_connect';
	}
	ldap_close( $connect );
	wfRestoreWarnings();
	return false;
}

Returning false makes less sense for events where the action is complete, and will normally be ignored by the caller.

Documentation

Currently, hooks in MediaWiki core have to be documented both in docs/hooks.txt (in the source code repository) and here on MediaWiki.org. In some cases, one of these steps may not yet have been completed, so if a hook appears undocumented, check both.

To document a hook on-wiki, use {{MediaWikiHook }}.

Available hooks

This page contains a list of hooks that are made available by the MediaWiki software, and is known to be complete to version 1.8.2. There is a lot of detail missing for the more recent hooks in particular, as their purpose/usage has not yet been documented by the developers. If you have any further information on any of these then please add it in the appropriate place.

In the tables, the first column gives the MediaWiki version that the hook was introduced in; use the link in the second column to find out more information about the hook and how to use it.

For a complete list of hooks, use the category, which should be kept more up to date

Hooks grouped by function

Some of these hooks can be grouped into multiple functions.

Sections: Article Management - Edit Page - Page Rendering - User Interface - Special Pages - User Management - Logging - Skinning Templates - API - Import/Export - Miscellaneous

Function	Version	Hook	Description
Article Management	1.4.0	ArticleDelete	Occurs whenever the software receives a request to delete an article
	1.4.0	ArticleDeleteComplete	Occurs after the delete article request has been processed
	1.9.1	ArticleUndelete	When one or more revisions of an article are restored
	1.12.0	ArticleRevisionUndeleted	Occurs after an article revision is restored
	1.8.0	ArticleFromTitle	Called to determine the class to handle the article rendering, based on title
	1.4.0	ArticleProtect	Occurs whenever the software receives a request to protect an article
	1.4.0	ArticleProtectComplete	Occurs after the protect article request has been processed
	1.6.0	ArticleInsertComplete	Occurs after a new article has been created
	1.11.0	RevisionInsertComplete	Called after a revision is inserted into the DB
	1.4.0	ArticleSave	(Deprecated; use PageContentSave) Occurs whenever the software receives a request to save an article
	1.21.0	PageContentSave	Occurs whenever the software receives a request to save an article
	1.4.0	ArticleSaveComplete	(deprecated; use PageContentSaveComplete) Occurs after the save article request has been processed
	1.21.0	PageContentSaveComplete	Occurs after the save article request has been processed
	1.11.0	ArticleUpdateBeforeRedirect	Occurs after a page is updated (usually on save), before the user is redirected back to the page
	1.5.7	ArticleEditUpdateNewTalk	Allows an extension to prevent user notification when a new message is added to their talk page.
	1.14.0	ArticleEditUpdates	Called when edit updates (mainly link tracking) are made when an article has been changed.
	1.6.0	ArticleEditUpdatesDeleteFromRecentchanges	Occurs before saving to the database. If returning false old entries are not deleted from the recentchangeslist.
	1.8.0	RecentChange_save	Called after a "Recent Change" is committed to the DB
	1.6.0	SpecialMovepageAfterMove	Called after a page is moved.
	1.22.0	TitleMove	Occurs before a requested pagemove is performed
	1.4.0	TitleMoveComplete	Occurs whenever a request to move an article is completed
	1.12.0	AbortMove	Allows to abort moving page from one title to another
	1.12.0	ArticleRollbackComplete	Occurs after an article rollback is completed
	1.12.0	ArticleMergeComplete	after merging to article using Special:Mergehistory
	1.6.0	ArticlePurge	Allows an extension to cancel a purge.
	1.13.0	ArticleRevisionVisibilitySet	called when changing visibility of one or more revisions of an article
	1.21.0	ContentHandlerDefaultModelFor	called when deciding the default content model for a given title.
	1.21.0	ContentHandlerForModelID	called when a ContentHandler is requested for a given content model name, but no entry for that model exists in $wgContentHandlers.
	1.23.0	Article::MissingArticleConditions	called when showing a page.
	1.20.0	TitleIsAlwaysKnown	Allows overriding default behaviour for determining if a page exists.
Edit Page	1.6.0	AlternateEdit	Used to replace the entire edit page, altogether.
	1.21.0	AlternateEditPreview	Allows replacement of the edit preview
	1.6.0	EditFilter	Perform checks on an edit
	1.12.0	EditFilterMerged	Perform checks on an edit
	1.7.0	EditFormPreloadText	Called when edit page for a new article is shown. This lets you fill the text-box of a new page with initial wikitext.
	1.8.3	EditPage::attemptSave	Called before an article is saved, that is before insertNewArticle() is called
	1.6.0	EditPage::showEditForm:fields	Allows injection of form field into edit form.
	1.6.0	EditPage::showEditForm:initial	Allows injection of HTML into edit form
	1.21.0	EditPage::showStandardInputs:options	Allows injection of form fields into the editOptions area
	1.13.0	EditPageBeforeConflictDiff	Allows modifying the EditPage object and output when there's an edit conflict.
	1.12.0	EditPageBeforeEditButtons	Used to modify the edit buttons on the edit form
	1.14.0	EditPageBeforeEditChecks	Allows modifying the edit checks below the textarea in the edit form
Page Rendering	1.27.0	AfterBuildFeedLinks	Executed after all feed links are created.
	1.6.0	ArticlePageDataBefore	Executes before data is loaded for the article requested.
	1.6.0	ArticlePageDataAfter	Executes after loading the data of an article from the database.
	1.6.0	ArticleViewHeader	Called after an articleheader is shown.
	1.6.0	PageRenderingHash	Alter the parser cache option hash key.
	1.6.0	ArticleAfterFetchContent	Used to process raw wiki code after most of the other parser processing is complete.
	1.22.0	GalleryGetModes	Allows extensions to add classes that can render different modes of a gallery.
	1.6.0	ParserClearState	Called at the end of Parser::clearState()
	1.21.0	ParserCloned	Called when the Parser object is cloned.
	1.5.0	ParserBeforeStrip	Used to process the raw wiki code before any internal processing is applied.
	1.5.0	ParserAfterStrip	(Deprecated) Before version 1.14.0, used to process raw wiki code after text surrounded by <nowiki> tags have been protected but before any other wiki text has been processed. In version 1.14.0 and later, runs immediately after ParserBeforeStrip.
	1.6.0	ParserBeforeInternalParse	Replaces the normal processing of stripped wiki text with custom processing. Used primarily to support alternatives (rather than additions) to the core MediaWiki markup syntax.
	1.6.0	ParserGetVariableValueVarCache	Use this to change the value of the variable cache or return false to not use it.
	1.6.0	ParserGetVariableValueTs	Use this to change the value of the time for the {{LOCAL...}} magic word.
	1.6.0	ParserGetVariableValueSwitch	Assigns a value to a user defined variable.
	1.10.0	InternalParseBeforeLinks	Used to process the expanded wiki code after <nowiki>, HTML-comments, and templates have been treated. Suitable for syntax extensions that want to customize the treatment of internal link syntax, i.e. [[....]].
	1.13.0	LinkerMakeExternalLink	Called before the HTML for external links is returned. Used for modifying external link HTML.
	1.13.0	LinkerMakeExternalImage	Called before external image HTML is returned. Used for modifying external image HTML.
	1.23.0	LinkerMakeMediaLinkFile	Called before the HTML for media links is returned. Used for modifying media link HTML.
	1.11.0	EditSectionLink	(Deprecated) Override the return value of Linker::editSectionLink(). Called after creating [edit] link in header in Linker::editSectionLink but before HTML is displayed.
	1.11.0	EditSectionLinkForOther	(Deprecated) Override the return value of Linker::editSectionLinkForOther(). Called after creating [edit] link in header in Linker::editSectionLinkForOther but before HTML is displayed.
	1.5.0	ParserBeforeTidy	Used to process the nearly-rendered html code for the page (but before any html tidying occurs).
	1.5.0	ParserAfterTidy	Used to add some final processing to the fully-rendered page output.
	1.24.0	ContentGetParserOutput	Customize parser output for a given content object, called by AbstractContent::getParserOutput. May be used to override the normal model-specific rendering of page content.
	1.8.0	OutputPageParserOutput	Called after parse, before the HTML is added to the output.
	1.6.0	OutputPageBeforeHTML	Called every time wikitext is added to the OutputPage, after it is parsed but before it is added. Called after the page has been rendered, but before the HTML is displayed.
	1.4.3	CategoryPageView	Called before viewing a categorypage in CategoryPage::view
	1.5.1	ArticleViewRedirect	Allows an extension to prevent the display of a "Redirected From" link on a redirect page.
	1.10.0	IsFileCacheable	Allow an extension to disable file caching on pages.
	1.10.1	BeforeParserFetchTemplateAndtitle	Allows an extension to specify a version of a page to get for inclusion in a template.
	1.18.0	BeforeParserFetchFileAndTitle	Allows an extension to select a different version of an image to link to.
	1.10.1	BeforeParserrenderImageGallery	Allows an extension to modify an image gallery before it is rendered.
	1.17.0	ResourceLoaderRegisterModules	Allows registering modules with ResourceLoader
	1.24.0	SidebarBeforeOutput	Directly before the sidebar is output
User Interface	1.5.4	AutoAuthenticate	Called to authenticate users on external/environmental means
	1.4.0	UserLoginComplete	Occurs after a user has successfully logged in
	1.18.0	BeforeWelcomeCreation	Allows an extension to change the message displayed upon a successful login.
	1.4.0	UserLogout	Occurs when the software receives a request to log out
	1.4.0	UserLogoutComplete	Occurs after a user has successfully logged out
	1.6.0	userCan	To interrupt/advise the "user can do X to Y article" check
	1.4.0	WatchArticle	Occurs whenever the software receives a request to watch an article
	1.4.0	WatchArticleComplete	Occurs after the watch article request has been processed
	1.4.0	UnwatchArticle	Occurs whenever the software receives a request to unwatch an article
	1.4.0	UnwatchArticleComplete	Occurs after the unwatch article request has been processed
	1.6.0	MarkPatrolled	Called before an edit is marked patrolled
	1.6.0	MarkPatrolledComplete	Called after an edit is marked patrolled
	1.4.0	EmailUser	Occurs whenever the software receives a request to send an email from one user to another
	1.4.0	EmailUserComplete	Occurs after an email has been sent from one user to another
	1.6.0	SpecialMovepageAfterMove	Called after a page is moved.
	1.19.0	SpecialSearchCreateLink	Called when making the message to create a page or go to an existing page
	1.17.0	SpecialSearchGo
	1.6.0	SpecialSearchNogomatch
	1.19.0	SpecialSearchPowerBox	the equivalent of SpecialSearchProfileForm for the advanced form
	1.5.7	ArticleEditUpdateNewTalk
	1.5.7	UserRetrieveNewTalks
	1.5.7	UserClearNewTalkNotification
	1.6.0	ArticlePurge
File Upload	1.6.0	UploadVerification	(Deprecated; use UploadVerifyFile) Called when a file is uploaded, to allow extra file verification to take place
	1.17	UploadVerifyFile	Called when a file is uploaded, to allow extra file verification to take place (preferred)
	1.6.4	UploadComplete	Called when a file upload has completed.
Special pages	1.6.0	SpecialPageGetRedirect
	1.24.0	SpecialBlockModifyFormFields	Add or modify block fields of Special:Block
	1.28.0	SpecialContributions::formatRow::flags	Called before rendering a Special:Contributions row.
	1.13.0	SpecialListusersDefaultQuery	Called right before the end of UsersPager::getDefaultQuery()
	1.13.0	SpecialListusersFormatRow	Called right before the end of UsersPager::formatRow()
	1.13.0	SpecialListusersHeader	Called before closing the <fieldset> in UsersPager::getPageHeader()
	1.13.0	SpecialListusersHeaderForm	Called before adding the submit button in UsersPager::getPageHeader()
	1.13.0	SpecialListusersQueryInfo	Called right before the end of UsersPager::getQueryInfo()
	1.6.0	SpecialPageExecuteBeforeHeader
	1.6.0	SpecialPageExecuteBeforePage
	1.6.0	SpecialPageExecuteAfterPage
	1.6.0	SpecialVersionExtensionTypes
		SpecialPage_initList	Called after the Special Page list is populated
	1.9.0	UploadForm:initial	Called just before the upload form is generated
	1.9.0	UploadForm:BeforeProcessing	Called just before the file data (for example description) are processed, so extensions have a chance to manipulate them.
	1.14.0	UserrightsChangeableGroups	Called after the list of groups that can be manipulated via Special:UserRights is populated, but before it is returned.
User Management	1.5.0	AddNewAccount	Called after a user account is created
	1.27.0	SessionMetadata	Add metadata to a session being saved
	1.27.0	SessionCheckInfo	Validate session info as it's being loaded from storage
	1.27.0	SecuritySensitiveOperationStatus	Affect the return value from AuthManager::securitySensitiveOperationStatus()
	1.27.0	UserLoggedIn	Called after a user is logged in
	1.4.0	BlockIp	Occurs whenever the software receives a request to block an IP address or user
	1.4.0	BlockIpComplete	Occurs after the request to block an IP or user has been processed
	1.6.0	UserRights	Called after a user's group memberships are changed
	1.6.0	GetBlockedStatus	Fired after the user's getBlockStatus is set
Logging	1.6.0	LogPageActionText
	1.5.0	LogPageLogHeader
	1.5.0	LogPageLogName
	1.5.0	LogPageValidTypes
	1.26.0	LogException
Skinning / Templates	1.7.0	BeforePageDisplay	Allows last minute changes to the output page, e.g. adding of CSS or Javascript by extensions.
	1.6.0	MonoBookTemplateToolboxEnd	Called by Monobook skin after toolbox links have been rendered (useful for adding more)
	1.7.0	PersonalUrls	(SkinTemplate.php) Called after the list of personal URLs (links at the top in Monobook) has been populated.
	1.24.0	PostLoginRedirect	(SpecialUserlogin.php) Modify the post login redirect behavior.
	1.23.0	BaseTemplateAfterPortlet	(SkinTemplate.php) After rendering of portlets.
	1.11.0	SkinAfterBottomScripts	(Skin.php) At the end of Skin::bottomScripts()
	1.12.0	SkinSubPageSubtitle	(Skin.php) Called before the list of subpage links on top of a subpage is generated
	1.5.0	SkinTemplateContentActions	Called after the default tab list is populated (list is context dependent i.e. "normal" article or "special page").
	1.16.0	SkinTemplateNavigation	Called on content pages only after tabs have been added, but before variants have been added. See the other two SkinTemplateNavigation hooks for other points tabs can be modified at.
	1.18.0	SkinTemplateNavigation::Universal	Called on both content and special pages after variants have been added
	1.18.0	SkinTemplateNavigation::SpecialPage	Called on special pages after the special tab is added but before variants have been added
	1.6.0	SkinTemplatePreventOtherActiveTabs	Called to enable/disable the inclusion of additional tabs to the skin.
	1.6.0	SkinTemplateSetupPageCss
	1.6.0	SkinTemplateBuildContentActionUrlsAfterSpecialPage
	1.6.0	SkinTemplateBuildNavUrlsNav_urlsAfterPermalink	Called after the permalink has been entered in navigation URL array.
	1.23.0	SkinTemplateGetLanguageLink	Called after building the data for a language link from which the actual html is constructed.
	1.27.0	AuthChangeFormFields	Allows modification of AuthManager-based forms
	1.25.0	LoginFormValidErrorMessages	Allows to add additional error messages (SpecialUserLogin.php).
	1.25.0	MinervaDiscoveryTools	Allow other extensions to add or override discovery tools (SkinMinerva.php).
API	1.23.0	ApiBeforeMain	Called before ApiMain is executed
	1.13.0	APIEditBeforeSave	Called right before saving an edit submitted through api.php?action=edit
	1.13.0	APIQueryInfoTokens	Use this hook to add custom tokens to prop=info
	1.13.0	APIQueryRevisionsTokens	Use this hook to add custom tokens to prop=revisions
	1.14.0	APIQueryRecentChangesTokens	Use this hook to add custom tokens to list=recentchanges
	1.14.0	APIGetAllowedParams	Use this hook to modify a module's parameters
	1.14.0	APIGetParamDescription	Use this hook to modify a module's parameter descriptions
	1.14.0	APIAfterExecute	Use this hook to extend core API modules
	1.14.0	APIQueryAfterExecute	Use this hook to extend core API query modules
	1.14.0	APIQueryGeneratorAfterExecute	Use this hook to extend core API query modules
	1.23.0	GetExtendedMetadata	Allows including additional file metadata information in the imageinfo API.
	1.23.0	AddNewAccountApiForm	Allows modifying the internal login form when creating an account via the API.
	1.23.0	AddNewAccountApiResult	Modifies the API output when an account is created via the API.
	1.25.0	ApiOpenSearchSuggest	Called when constructing the OpenSearch results. Hooks can alter or append to the array.
Import/Export	1.17.0	AfterImportPage	When a page import is completed
	1.17.0	ImportHandleLogItemXMLTag	When parsing a XML tag in a log item
	1.17.0	ImportHandlePageXMLTag	When parsing a XML tag in a page
	1.17.0	ImportHandleRevisionXMLTag	When parsing a XML tag in a page revision
	1.17.0	ImportHandleToplevelXMLTag	When parsing a top level XML tag
	1.17.0	ImportHandleUploadXMLTag	When parsing a XML tag in a file upload
	1.16.0	ModifyExportQuery	Modify the query used by the exporter.
	1.15.0	WikiExporter::dumpStableQuery	Get the SELECT query for "stable" revisions dumps
	1.16.0	XmlDumpWriterOpenPage	Called at the end of XmlDumpWriter::openPage, to allow extra metadata to be added.
	1.16.0	XmlDumpWriterWriteRevision	Called at the end of a revision in an XML dump, to add extra metadata.
Miscellaneous	1.6.0	ArticleEditUpdatesDeleteFromRecentchanges
	1.19.0	Collation::factory	Allows extensions to register new collation names, to be used with $wgCategoryCollation
	1.18.0	GetDefaultSortkey	Allows to override what the default sortkey is, which is used to order pages in a category.
	1.25.0	GetDifferenceEngine	Allows custom difference engine extensions such as Special:MyLanguage/Extension:WikEdDiff.
	1.6.0	GetInternalURL	Used to modify fully-qualified URLs (useful for squid cache purging)
	1.6.0	GetLocalURL	Used to modify local URLs as output into page links
	1.6.0	GetFullURL	Used to modify fully-qualified URLs used in redirects/export/offsite data
	1.16.0	ImgAuthBeforeStream	Executed before file is streamed to user, but only when using img_auth
	1.14.0	LinkBegin	Used when generating internal and interwiki links in Linker::link()
	1.22.0	LanguageLinks	Manipulate a page's language links.
	1.14.0	LinkEnd	Used when generating internal and interwiki links in Linker::link(), just before the function returns a value.
	1.6.0	MagicWordMagicWords
	1.6.0	MagicWordwgVariableIDs
	1.21.0	GetDoubleUnderscoreIDs	hook for modifying the list of magic words
	1.5.7	MessagesPreLoad	Occurs when loading a message from the database
	1.6.0	ParserTestParser
	1.5.0	SpecialContributionsBeforeMainOutput
	1.12.0	MediaWikiPerformAction	Override MediaWiki::performAction()
	1.17.0	UnitTestsList	Add tests that should be run as part of the unit test suite.
	1.4.0	UnknownAction	Used to add new query-string actions
	1.6.0	wgQueryPages
	1.8.0	DisplayOldSubtitle
	1.8.0	LoadAllMessages
	1.8.0	RecentChange_save	Called after a "Recent Change" is committed to the DB
	1.19.0	AlternateUserMailer	Called before mail is sent so that mail could be logged (or something else) instead of using PEAR or PHP's mail().
	1.24.0	UserMailerChangeReturnPath	Called to generate a VERP return address when UserMailer sends an email, with a bounce handling extension.
	1.8.0	UserToggles	(Deprecated) Called before returning user preference names. Use the GetPreferences hook instead.

Alphabetical list of hooks

Version	Hook	Called From	Description
1.181.18.0	AbortAutoAccount	SpecialUserlogin.php	Allow to cancel automated local account creation, where normally authentication against an external auth plugin would be creating a local account.
1.130 1.13.0	AbortAutoblock	Block.php	Allow extension to cancel an autoblock
1.140 1.14.0	AbortDiffCache	DifferenceEngine.php	Can be used to cancel the caching of a diff
1.200 1.20.0	AbortEmailNotification	RecentChange.php	Can be used to cancel email notifications for an edit
1.1201.12.0	AbortMove	Title.php, SpecialMovepage.php	Can be used to cancel page movement
1.1801.18.0	ActionBeforeFormDisplay	Action.php	Before executing the HTMLForm object
1.1801.18.0	ActionModifyFormFields	Action.php	Before creating an HTMLForm object for a page action
1.0501.5.0	AddNewAccount	SpecialUserlogin.php	Called after a user account is created
1.2701.27.0	AfterBuildFeedLinks	OutputPage.php	Executed after all feed links are created.
1.2001.20.0	AfterFinalPageOutput	OutputPage.php	Nearly at the end of OutputPage::output().
1.1701.17.0	AfterImportPage	Import.php	When a page import is completed
1.1701.17.0	AfterUserMessage	User.php	After a user message has been left
1.0911.9.1	AjaxAddScript	OutputPage.php	Called in output page just before the initialisation
1.0601.6.0	AlternateEdit	EditPage.php	Occurs whenever action=edit is called
1.2101.21.0	AlternateEditPreview	EditPage.php	Allows replacement of the edit preview
1.1901.19.0	AlternateUserMailer	UserMailer.php	Called before mail is sent so that mail could be logged (or something else) instead of using PEAR or PHP's mail().
1.1401.14.0	APIAfterExecute	ApiMain.php	Use this hook to extend core API modules
1.2301.23.0	ApiBeforeMain	api.php	Called before ApiMain is executed
1.2001.20.0	ApiCheckCanExecute	ApiMain.php	Called during ApiMain::checkCanExecute().
1.1301.13.0	APIEditBeforeSave	ApiEditPage.php	Called right before saving an edit submitted through api.php?action=edit
1.1401.14.0	APIGetAllowedParams	ApiBase.php	Use this hook to modify a module's parameters
1.1901.19.0	APIGetDescription	ApiBase.php	Use this hook to modify a module's descriptions
1.1401.14.0	APIGetParamDescription	ApiBase.php	Use this hook to modify a module's parameter descriptions
1.2001.20.0	APIGetResultProperties	ApiBase.php	Use this hook to modify the properties in a module's result.
1.2001.20.0	ApiMain::onException	ApiMain.php	Called by ApiMain::executeActionWithErrorHandling() when an exception is thrown during API action execution.
1.2501.25.0	ApiOpenSearchSuggest	ApiOpenSearch.php	Called when constructing the OpenSearch results.
1.2001.20.0	ApiTokensGetTokenTypes	ApiTokens.php	Use this hook to extend action=tokens with new token types
1.1401.14.0	APIQueryAfterExecute	ApiQuery.php	Use this hook to extend core API query modules
1.1401.14.0	APIQueryGeneratorAfterExecute	ApiQuery.php	Use this hook to extend core API query modules
1.1301.13.0	APIQueryInfoTokens	ApiQueryInfo.php	Use this hook to add custom tokens to prop=info.
1.1401.14.0	APIQueryRecentChangesTokens	ApiQueryRecentChanges.php	Use this hook to add custom tokens to list=recentchanges.
1.1301.13.0	APIQueryRevisionsTokens	ApiQueryRevisions.php	Use this hook to add custom tokens to prop=revisions.
1.1501.15.0	APIQueryUsersTokens	ApiQueryUsers.php	Use this hook to add custom tokens to list=users.
1.1701.17.0	ApiRsdServiceApis	ApiRsd.php	Add or remove APIs from the RSD services list.
1.2301.23.0	Article::MissingArticleConditions	Article.php	Called when an article is shown.
1.0601.6.0	ArticleAfterFetchContent	Article.php	Used to process raw wiki code after most of the other parser processing is complete.
1.1601.16.0	ArticleConfirmDelete	Article.php	Occurs before writing the confirmation form for article deletion.
1.1701.17.0	ArticleContentOnDiff	DifferenceEngine.php	Before showing the article content below a diff.
1.0401.4.0	ArticleDelete	Article.php	Occurs whenever the software receives a request to delete an article
1.0401.4.0	ArticleDeleteComplete	Article.php	Occurs after the delete article request has been processed
1.0571.5.7	ArticleEditUpdateNewTalk	Article.php	Allows an extension to prevent user notification when a new message is added to their talk page.
1.1401.14.0	ArticleEditUpdates	Article.php	Called when edit updates (mainly link tracking) are made when an article has been changed.
1.0601.6.0	ArticleEditUpdatesDeleteFromRecentchanges	Article.php	Occurs before saving to the database. If returning false old entries are not deleted from the recentchangeslist.
1.0801.8.0	ArticleFromTitle	Wiki.php	Called to determine the class to handle the article rendering, based on title.
1.0601.6.0	ArticleInsertComplete	Article.php	Called after an article is created
1.1201.12.0	ArticleMergeComplete	SpecialMergeHistory.php	after merging to article using Special:Mergehistory
1.0601.6.0	ArticlePageDataAfter	Article.php	after loading data of an article from the database
1.0601.6.0	ArticlePageDataBefore	Article.php	before loading data of an article from the database
1.1801.18.0	ArticlePrepareTextForEdit	Article.php	Called when preparing text to be saved.
1.0401.4.0	ArticleProtect	Article.php	Occurs whenever the software receives a request to protect an article
1.0401.4.0	ArticleProtectComplete	Article.php	Occurs after the protect article request has been processed
1.0601.6.0	ArticlePurge	Article.php	Allows an extension to cancel a purge.
1.1301.13.0	ArticleRevisionVisiblitySet	SpecialRevisiondelete.php	called when changing visibility of one or more revisions of an article
1.1201.12.0	ArticleRevisionUndeleted	SpecialUndelete.php	Occurs after an article revision is restored
1.1201.12.0	ArticleRollbackComplete	Article.php	Occurs after an article rollback is completed
1.0401.4.0	ArticleSave	Article.php	Occurs whenever the software receives a request to save an article
1.0401.4.0	ArticleSaveComplete	Article.php	Occurs after the save article request has been processed
1.0911.9.1	ArticleUndelete	SpecialUndelete.php	When one or more revisions of an article are restored
1.1101.11.0	ArticleUpdateBeforeRedirect	Article.php	Occurs after a page is updated (usually on save), before the user is redirected back to the page
1.1901.19.0	ArticleViewCustom	Article.php	Allows to output the text of the article in a different format than wikitext.
1.1801.18.0	ArticleViewFooter	Article.php	After showing the footer section of an ordinary page view.
1.0601.6.0	ArticleViewHeader	Article.php	Occurs when header is shown
1.0511.5.1	ArticleViewRedirect	Article.php	Allows an extension to prevent the display of a "Redirected From" link on a redirect page.
1.27701.27.0	AuthChangeFormFields	AuthManagerSpecialPage.php	Allows modification of AuthManager-based forms
1.1301.13.0	AuthPluginAutoCreate	SpecialUserlogin.php	Called when creating a local account for an user logged in from an external authentication method
1.0911.9.1	AuthPluginSetup	Setup.php	Update or replace authentication plugin object ($wgAuth)
1.0541.5.4	AutoAuthenticate	StubObject.php	Called to authenticate users on external/environmental means.
1.1201.12.0	AutopromoteCondition	Autopromote.php	check autopromote condition for user.
1.1901.19.0	BacklinkCacheGetConditions	BacklinkCache.php	Allows to set conditions for query when links to certain title.
1.1901.19.0	BacklinkCacheGetPrefix	BacklinkCache.php	Allows to set prefix for a spefific link table.
1.0701.7.0	BadImage	ImageFunctions.php	Before bad image list is evaluated
1.2301.23.0	BaseTemplateAfterPortlet	SkinTemplate.php	Called after rendering of portlets.
1.1801.18.0	BaseTemplateToolbox	SkinTemplate.php	Called by BaseTemplate when building the toolbox array and returning it for the skin to output.
1.101 1.10.1	BeforeGalleryFindFile	ImageGallery.php	Allows extensions to specify a specific version of an image to display in a gallery.
1.190 1.19.0	BeforeDisplayNoArticleText	Article.php	Before displaying noarticletext or noarticletext-nopermission messages.
1.160 1.16.0	BeforeInitialize	Wiki.php	Occurs before anything is initialized in MediaWiki::performRequestForTitle().
1.0701.7.0	BeforePageDisplay	OutputPage.php SkinTemplate.php (< 1.12.0)	Allows last minute changes to the output page, e.g. adding of CSS or Javascript by extensions.
1.1901.19.0	BeforePageRedirect	OutputPage.php	Called prior to sending an HTTP redirect.
1.1801.18.0	BeforeParserFetchFileAndTitle	Parser.php	Before an image is rendered by Parser
1.1011.10.1	BeforeParserFetchTemplateAndtitle	Parser.php	Before a template is fetched by Parser
1.1011.10.1	BeforeParserrenderImageGallery	Parser.php	Before an image gallery is rendered by Parser
1.1201.12.0	BeforeWatchlist	SpecialWatchlist.php	Override watchlist display or add extra SQL clauses.
1.1801.18.0	BeforeWelcomeCreation	SpecialUserlogin.php	Allows an extension to change the message displayed upon a successful login.
1.1901.19.0	BitmapHandlerCheckImageArea	Bitmap.php	Called by BitmapHandler::normaliseParams(), after all normalizations have been performed, except for the $wgMaxImageArea check.
1.1801.18.0	BitmapHandlerTransform	Bitmap.php	Before a file is transformed, gives extension the possibility to transform it themselves.
1.0401.4.0	BlockIp	SpecialBlockip.php	Occurs whenever the software receives a request to block an IP address or user
1.0401.4.0	BlockIpComplete	SpecialBlockip.php	Occurs after the request to block an IP or user has been processed
1.0911.9.1	BookInformation	SpecialBooksources.php	Before information output on Special:Booksources
1.1301.13.0	BrokenLink	Linker.php	Before the HTML is created for a broken (i.e. red) link
1.1701.17.0	CanonicalNamespaces	Namespace.php	For extensions adding their own namespaces or altering the defaults.
1.0431.4.3	CategoryPageView	CategoryPage.php	Called before viewing a categorypage in CategoryPage::view
1.2001.20.0	ChangePasswordForm	SpecialChangePassword.php	For extensions that need to add a field to the ChangePassword form via the Preferences form
1.1201.12.0	ChangesListInsertArticleLink	ChangesList.php	Override or augment link to article in RC list.
1.2801.28.0	ChangeTagsAfterUpdateTags	ChangeTags.php	Called after adding or updating change tags
1.1901.19.0	Collation::factory	Collation.php	Allows extensions to register new collation names, to be used with $wgCategoryCollation
1.1601.16.0	ConfirmEmailComplete	User.php	Called after a user's email has been confirmed successfully.
1.2401.24.0	ContentGetParserOutput	AbstractContent.php	Customize parser output for a given content object, called by AbstractContent::getParserOutput. May be used to override the normal model-specific rendering of page content.
1.2101.21.0	ContentHandlerDefaultModelFor	ContentHandler.php	Called when deciding the default content model for a given title.
1.2101.21.0	ContentHandlerForModelID	ContentHandler.php	Allows to provide custom content handlers for content models.
1.1301.13.0	ContribsPager::getQueryInfo	SpecialContributions.php	Before the contributions query is about to run
1.2001.20.0	ContribsPager::reallyDoQuery	SpecialContributions.php	Called before really executing the query for My Contributions
1.1301.13.0	ContributionsLineEnding	SpecialContributions.php	Called before a contributions HTML line is finished
1.1101.11.0	ContributionsToolLinks	SpecialContributions.php	Change tool links above Special:Contributions
1.0911.9.1	CustomEditor	Wiki.php	When invoking the page editor. Return true to allow the normal editor to be used, or false if implementing a custom editor, e.g. for a special namespace, etc.
1.1601.16.0	DatabaseOraclePostInit	DatabaseOracle.php	Called after initialising an Oracle database connection
1.0701.7.0	DiffViewHeader	DifferenceEngine.php	Called before diff display
1.0801.8.0	DisplayOldSubtitle	Article.php	Allows extensions to modify the displaying of links to other revisions when browsing through revisions.
1.1401.14.0	DoEditSectionLink	Linker.php	Override the HTML generated for section edit links.
1.0601.6.0	EditFilter	EditPage.php	Perform checks on an edit
1.1201.12.0	EditFilterMerged	EditPage.php	Perform checks on an edit
1.0701.7.0	EditFormPreloadText	EditPage.php	Called when edit page for a new article is shown. This lets you fill the text-box of a new page with initial wikitext.
1.1601.16.0	EditFormInitialText	EditPage.php	Called when edit page for a existing article is shown. This lets you modify the content.
1.0831.8.3	EditPage::attemptSave	EditPage.php	Called before an article is saved, that is before insertNewArticle() is called
1.1601.16.0	EditPage::importFormData	EditPage.php	Allow extensions to read additional data posted in the form
1.0601.6.0	EditPage::showEditForm:fields	EditPage.php	Allows injection of form field into edit form.
1.0601.6.0	EditPage::showEditForm:initial	EditPage.php	before showing the edit form
1.2101.21.0	EditPage::showStandardInputs:options	EditPage.php	Allows injection of form fields into the editOptions area
1.1301.13.0	EditPageBeforeConflictDiff	EditPage.php	Allows modifying the EditPage object and output when there's an edit conflict.
1.1201.12.0	EditPageBeforeEditButtons	EditPage.php	Used to modify the edit buttons on the edit form
1.1401.14.0	EditPageBeforeEditChecks	EditPage.php	Allows modifying the edit checks below the textarea in the edit form
1.1601.16.0	EditPageBeforeEditToolbar	EditPage.php	Allows modifying the edit toolbar above the textarea
1.1601.16.0	EditPageCopyrightWarning	EditPage.php	Allow for site and per-namespace customization of contribution/copyright notice.
1.1601.16.0	EditPageGetDiffText	EditPage.php	Allow modifying the wikitext that will be used in "Show changes".
1.1601.16.0	EditPageGetPreviewText	EditPage.php	Allow modifying the wikitext that will be previewed.
1.1601.16.0	EditPageNoSuchSection	EditPage.php	When a section edit request is given for an non-existent section.
1.1601.16.0	EditPageTosSummary	EditPage.php	Give a chance for site and per-namespace customizations of terms of service summary link.
1.1101.11.0	EditSectionLink	EditPage.php	Override the return value of Linker::editSectionLink()
1.1101.11.0	EditSectionLinkForOther	EditPage.php	Override the return value of Linker::editSectionLink()
1.0701.7.0	EmailConfirmed	User.php	When checking that the user's email address is "confirmed"
1.0401.4.0	EmailUser	SpecialEmailuser.php	Occurs whenever the software receives a request to send an email from one user to another
1.1701.17.0	EmailUserCC	SpecialEmailuser.php	Occurs before sending the copy of the email to the author
1.0401.4.0	EmailUserComplete	SpecialEmailuser.php	Occurs after an email has been sent from one user to another
1.1701.17.0	EmailUserForm	SpecialEmailuser.php	Occurs after building the email user form object
1.1601.16.0	EmailUserPermissionsErrors	SpecialEmailuser.php	Retrieves permissions errors for emailing a user
1.1901.19.0	ExemptFromAccountCreationThrottle	SpecialUserlogin.php	To add an exemption from the account creation throttle
1.1801.18.0	ExtensionTypes	SpecialVersion.php	Called when generating the extensions credits, use this to change the tables headers
1.1901.19.0	ExtractThumbParameters	thumb.php	Called when extracting thumbnail parameters from a thumbnail file name.
1.0701.7.0	FetchChangesList	ChangesList.php	Allows extension to modify a recent changes list for a user.
1.130 1.13.0	FileDeleteComplete	FileDeleteForm.php	When a file is deleted
1.200 1.20.0	FileTransformed	File.php	When a file is transformed and moved into storage
1.110 1.11.0	FileUpload	filerepo/LocalFile.php	When a file upload occurs
1.130 1.13.0	FileUndeleteComplete	SpecialUndelete.php	When a file is undeleted
1.200 1.20.0	FormatAutocomments	Linker.php	When an autocomment is formatted by the Linker
1.170 1.17.0	FormatUserMessage	User.php	Hook to format a message if you want to override the internal formatter.
1.220 1.22.0	GalleryGetModes	ImageGalleryBase.php	Allows extensions to add classes that can render different modes of a gallery.
1.130 1.13.0	GetAutoPromoteGroups	Autopromote.php	When determining which autopromote groups a user is entitled to be in.
1.0601.6.0	GetBlockedStatus	User.php	Fired after the user's getBlockStatus is set.
1.1301.13.0	GetCacheVaryCookies	OutputPage.php	get cookies that should vary cache options
1.1801.18.0	GetCanonicalURL	Title.php	Allows to modify fully-qualified URLs used for IRC and e-mail notifications.
1.1801.18.0	GetDefaultSortkey	Title.php	Allows to override what the default sortkey is.
1.2501.25.0	GetDifferenceEngine	ContentHandler.php	Allows custom difference engine extensions such as ESpecial:MyLanguage/xtension:WikEdDiff.
1.2301.23.0	GetExtendedMetadata	FormatMetadata.php	Allows including additional file metadata information in the imageinfo API.
1.0601.6.0	GetFullURL	Title.php	Used to modify fully-qualified URLs used in redirects/export/offsite data
1.0601.6.0	GetInternalURL	Title.php	Used to modify fully-qualified URLs (useful for squid cache purging)
1.170 1.17.0	GetIP	ProxyTools.php	Modify the ip of the current user (called only once).
1.1201.12.0	GetLinkColours	LinkHolderArray.php	modify the CSS class of an array of page links
1.0601.6.0	GetLocalURL	Title.php	Used to modify local URLs as output into page links
1.1901.19.0	GetLocalURL::Article	Title.php	Allows to modify local URLs specifically pointing to article paths without any fancy queries or variants.
1.1901.19.0	GetLocalURL::Internal	Title.php	Allows to modify local URLs to internal pages.
1.1801.18.0	GetMetadataVersion	Generic.php	Allows to modify the image metadata version currently in use.
1.1501.15.0	GetPreferences	Preferences.php	Modify user preferences
1.1201.12.0	getUserPermissionsErrors	Title.php	Add a permissions error when permissions errors are checked for.
1.1201.12.0	getUserPermissionsErrorsExpensive	Title.php	Absolutely the same, but is called only if expensive checks are enabled.
1.2001.20.0	GitViewers	GitInfo.php	Called when generating the list of git viewers for Special:Version, use this to change the list.
1.1401.14.0	HTMLCacheUpdate::doUpdate	HTMLCacheUpdate.php	After cache invalidation updates are inserted into the job queue
1.1301.13.0	ImageBeforeProduceHTML	Linker.php	Called before producing the HTML created by a wiki image insertion.
1.1101.11.0	ImageOpenShowImageInlineBefore	ImagePage.php	Call potential extension just before showing the image on an image page.
1.1601.16.0	ImagePageAfterImageLinks	ImagePage.php	Called after the image links section on an image page is built.
1.1301.13.0	ImagePageFileHistoryLine	ImagePage.php	Called when a file history line is contructed.
1.1301.13.0	ImagePageFindFile	ImagePage.php	Called when fetching the file associed with an image page.
1.1601.16.0	ImagePageShowTOC	ImagePage.php	Called when the file toc on an image page is generated.
1.170 1.17.0	ImportHandleLogItemXMLTag	Import.php	When parsing a XML tag in a log item
1.170 1.17.0	ImportHandlePageXMLTag	Import.php	When parsing a XML tag in a page
1.170 1.17.0	ImportHandleRevisionXMLTag	Import.php	When parsing a XML tag in a page revision
1.170 1.17.0	ImportHandleToplevelXMLTag	Import.php	When parsing a top level XML tag
1.170 1.17.0	ImportHandleUploadXMLTag	Import.php	When parsing a XML tag in a file upload
1.200 1.20.0	InfoAction	InfoAction.php	When building information to display on the action=info page
1.1101.11.0	InitPreferencesForm	SpecialPreferences.php	Called at the end of PreferencesForm's constructor
1.16.01.16.0	ImgAuthBeforeStream	img_auth.php	Executed before file is streamed to user, but only when using img_auth
1.1301.13.0	InitializeArticleMaybeRedirect	Wiki.php	Called when checking if title is a redirect
1.1001.10.0	InternalParseBeforeLinks	Parser.php	Used to process the expanded wiki code after <nowiki>, HTML-comments, and templates have been treated. Suitable for syntax extensions that want to support templates and comments.
1.160 1.16.0	InvalidateEmailComplete	User.php	Called after a user's email has been invalidated successfully.
1.180 1.18.0	IRCLineURL	RecentChange.php	When constructing the URL to use in an IRC notification.
1.100 1.10.0	IsFileCacheable	Article.php	Allow an extension to disable file caching on pages.
1.0901.9.0	IsTrustedProxy	ProxyTools.php	Allows an extension to set an IP as trusted or not.
1.120 1.12.0	isValidEmailAddr	User.php	Override the result of User::isValidEmailAddr()
1.110 1.11.0	isValidPassword	User.php	Override the result of User::isValidPassword()
1.1901.19.0	Language::getMessagesFileName	languages/Language.php	Use to change the path of a localisation file.
1.1901.19.0	LanguageGetNamespaces	languages/Language.php	Provide custom ordering for namespaces or remove namespaces.
1.0901.9.0	LanguageGetSpecialPageAliases	languages/Language.php	Use to define aliases of special pages names depending of the language
1.1801.18.0	LanguageGetTranslatedLanguageNames	languages/Language.php	Provide translated language names.
1.2201.22.0	LanguageLinks	api/ApiParse.php, skin/OutputPage.php	Manipulate a page's language links.
1.1401.14.0	LinkBegin	Linker.php	Used when generating internal and interwiki links in Linker::link()
1.1401.14.0	LinkEnd	Linker.php	Used when generating internal and interwiki links in Linker::link(), just before the function returns a value.
1.1301.13.0	LinkerMakeExternalLink	Linker.php	At the end of Linker::makeExternalLink() just before the return
1.1301.13.0	LinkerMakeExternalImage	Linker.php	At the end of Linker::makeExternalImage() just before the return
1.120 1.12.0	LinksUpdate	LinksUpdate.php	At the beginning of LinksUpdate::doUpdate() just before the actual update.
1.120 1.12.0	LinksUpdateComplete	LinksUpdate.php	At the end of LinksUpdate::doUpdate() when updating has completed.
1.110 1.11.0	LinksUpdateConstructed	LinksUpdate.php	At the end of LinksUpdate() is construction.
1.150 1.15.0	ListDefinedTags	ChangeTags.php	When trying to find all defined tags.
1.0801.8.0	LoadAllMessages	MessageCache.php	called by MessageCache::loadAllMessages() to load extensions messages
1.101 1.10.1	LoadExtensionSchemaUpdates	maintenance/updaters.inc	Fired when MediaWiki is updated to allow extensions to update the database.
1.130 1.13.0	LocalFile::getHistory	LocalFile.php	Called before file history query performed
1.190 1.19.0	LocalFilePurgeThumbnails	LocalFile.php	Called before thumbnails for a local file a purged
1.260 1.26.0	LogException	MWExceptionHandler.php	Called before an exception (or PHP error) is logged
1.190 1.19.0	LogEventsListShowLogExtract	LogEventsList.php	Called before the result of LogEventsList::showLogExtract() is added to OutputPage.
1.100 1.10.0	LoginAuthenticateAudit	SpecialUserlogin.php	A login attempt for a valid user account either succeeded or failed. No return data is accepted; this hook is for auditing only.
1.1201.12.0	LogLine	SpecialLog.php	Processes a single log entry on Special:Log
1.0601.6.0	LogPageActionText	Setup.php	Strings used by wfMsg as a header. DEPRECATED: Use $wgLogActions
1.0501.5.0	LogPageLogHeader	Setup.php	Strings used by wfMsg as a header. DEPRECATED: Use $wgLogHeaders
1.0501.5.0	LogPageLogName	Setup.php	Name of the logging page(s). DEPRECATED: Use $wgLogNames
1.0501.5.0	LogPageValidTypes	Setup.php	Action being logged. DEPRECATED: Use $wgLogTypes
1.0601.6.0	MagicWordwgVariableIDs	MagicWord.php	Allows extensions to add Magic Word IDs.
1.1801.18.0	MaintenanceRefreshLinksInit	maintenance/refreshLinks.php	Before executing the refreshLinks.php maintenance script.
1.1401.14.0	MakeGlobalVariablesScript	Skin.php	called right before Skin::makeVariablesScript() is executed
1.0601.6.0	MarkPatrolled	Article.php	Called before an edit is marked patrolled
1.0601.6.0	MarkPatrolledComplete	Article.php	Called after an edit is marked patrolled
1.0701.7.0	MathAfterTexvc	Math.php	After texvc is executed when rendering mathematics DEPRECATED: Use MathFormulaPostRender
1.2501.7.0	MathFormulaPostRender	Math.php	After math is rendered, before it's printed to the screen
1.1201.12.0	MediaWikiPerformAction	Wiki.php	Override MediaWiki::performAction().
1.1501.15.0	MessageCacheReplace	MessageCache.php	When a message page is changed. Useful for updating caches.
1.1601.16.0	MessageNotInMwNs	MessageCache.php	When trying to get a message that isn't found in the MediaWiki namespace
1.0571.5.7	MessagesPreLoad	MessageCache.php	Occurs when loading a message from the database
1.1601.16.0	ModifyExportQuery	Export.php	Modify the query used by the exporter.
1.0601.6.0	MonoBookTemplateToolboxEnd	skins/Monobook.php	Called by Monobook skin after toolbox links have been rendered (useful for adding more)
1.2001.20.0	NamespaceIsMovable	Namespace.php	Called when determining if it is possible to pages in a namespace.
1.1501.15.0	NewDifferenceEngine	diff/DifferenceEngine.php	Called when a new DifferenceEngine object is made.
1.1301.13.0	NewRevisionFromEditComplete	(Various files)	Called when a revision was inserted due to an edit
1.1301.13.0	NormalizeMessageKey	MessageFunctions.php	Called before the software gets the text of a message
1.1401.14.0	OldChangesListRecentChangesLine	ChangesList.php	Customize entire Recent Changes line
1.1301.13.0	OpenSearchUrls	opensearch_desc.php	Called when constructing the OpenSearch description XML.
1.1601.16.0	OtherBlockLogLink	SpecialBlockip.php	Get links to the block log from extensions which blocks users and/or IP addresses too
1.0601.6.0	OutputPageBeforeHTML	OutputPage.php	Called after the page has been rendered, but before the HTML is displayed.
1.1701.17.0	OutputPageBodyAttributes	OutputPage.php	Called when OutputPage::headElement() is creating the body tag.
1.1401.14.0	OutputPageCheckLastModified	OutputPage.php	When checking if the page has been modified since the last visit
1.1301.13.0	OutputPageMakeCategoryLinks	OutputPage.php	Called when links are about to be generated for the page's categories.
1.0801.8.0	OutputPageParserOutput	OutputPage.php	after adding a parserOutput to $wgOut
1.1901.19.0	PageContentLanguage	Title.php	Allows changing the page content language and the direction depending on that language.
1.1001.10.0	PageHistoryBeforeList	PageHistory.php	When a history page list is about to be constructed.
1.1001.10.0	PageHistoryLineEnding	PageHistory.php	Right before the end >li> is added to a history line
1.1301.13.0	PageHistoryPager::getQueryInfo	PageHistory.php	When a history pager query parameter set is constructed
1.0601.6.0	PageRenderingHash	User.php	Alter the parser cache option hash key
1.2001.20.0	ParserAfterParse	Parser.php	Called from Parser::parse() just after the call to Parser::internalParse() returns
1.0501.5.0	ParserAfterStrip	Parser.php	Same as ParserBeforeStrip
1.0501.5.0	ParserAfterTidy	Parser.php	Used to add some final processing to the fully-rendered page output
1.0601.6.0	ParserBeforeInternalParse	Parser.php	called at the beginning of Parser::internalParse()
1.0501.5.0	ParserBeforeStrip	Parser.php	Used to process the raw wiki code before any internal processing is applied
1.0501.5.0	ParserBeforeTidy	Parser.php	Used to process the nearly-rendered html code for the page (but before any html tidying occurs)
1.0601.6.0	ParserClearState	Parser.php	called at the end of Parser::clearState()
1.2101.21.0	ParserCloned	Parser.php	called when the Parser object is cloned
1.1201.12.0	ParserFirstCallInit	Parser.php	called when the parser initialises for the first time
1.0601.6.0	ParserGetVariableValueSwitch	Parser.php	called when the parser needs the value of a custom magic word
1.0601.6.0	ParserGetVariableValueTs	Parser.php	use this to change the value of the time for the {{LOCAL...}} magic word
1.0601.6.0	ParserGetVariableValueVarCache	Parser.php	use this to change the value of the variable cache or return false to not use it
1.1201.12.0	ParserLimitReport	Parser.php	called at the end of Parser::parse() when the parser will include comments about size of the text parsed
1.1201.12.0	ParserMakeImageParams	Parser.php	called at the end of Parser::makeImage(). Alter the parameters used to generate an image.
1.1901.19.0	ParserSectionCreate	Parser.php	Called each time the parser creates a document section from wikitext.
1.2001.20.0	ParserTestGlobals	parserTest.inc, NewParserTest.php	Allows to define globals for parser tests.
1.0601.6.0	ParserTestParser	parserTest.inc, NewParserTest.php	called when creating a new instance of Parser in maintenance/parserTests.inc
1.1001.10.0	ParserTestTables	maintenance/parserTests.inc	Alter the list of tables to duplicate when parser tests are run. Use when page save hooks require the presence of custom tables to ensure that tests continue to run properly.
1.1801.18.0	PerformRetroactiveAutoblock	Block.php	Called before a retroactive autoblock is applied to a user.
1.0601.6.0	PersonalUrls	SkinTemplate.php	Alter the user-specific navigation links (e.g. "my page, my talk page, my contributions" etc).
1.0901.9.0	PingLimiter	User.php	Allows extensions to override the results of User::pingLimiter()
1.1901.19.0	PlaceNewSection	WikiPage.php	Allows extensions to control where new sections are added.
1.2401.24.0	PostLoginRedirect	SpecialUserlogin.php	Modify the post login redirect behavior.
1.2001.20.0	PreferencesGetLegend	Preferences.php	Override the text used for the <legend> of a preferences section.
1.0901.9.0	PreferencesUserInformationPanel	SpecialPreferences.php	Add HTML bits to user information list in preferences form
1.1201.12.0	PrefixSearchBackend	PrefixSearch.php	Override the title prefix search used for OpenSearch and AJAX search suggestions.
1.1101.11.0	PrefsEmailAudit	SpecialPreferences.php	called when user changes his email address
1.1101.11.0	PrefsPasswordAudit	SpecialPreferences.php	called when user changes his password
1.1601.16.0	ProtectionForm::buildForm	ProtectionForm.php	Called after all protection type fieldsets are made in the form
1.1601.16.0	ProtectionForm::save	ProtectionForm.php	Called when a protection form is submitted
1.1601.16.0	ProtectionForm::showLogExtract	ProtectionForm.php	Called after the protection log extract is shown
1.1001.10.0	RawPageViewBeforeOutput	RawPage.php	Right before the text is blown out in action=raw
1.0801.8.0	RecentChange_save	RecentChange.php	Called after a "Recent Change" is commited to the DB
1.2001.20.0	RedirectSpecialArticleRedirectParams	SpecialPage.php	Lets you alter the set of parameter names such as "oldid" that are preserved when using.
1.1101.11.0	RenderPreferencesForm	SpecialPreferences.php	Called at the end of PreferencesForm::mainPrefsForm
1.1901.19.0	RequestContextCreateSkin	RequestContext.php	Called when creating a skin instance.
1.1101.11.0	ResetPreferences	SpecialPreferences.php	Called at the end of PreferencesForm::resetPrefs
1.1701.17.0	ResourceLoaderGetConfigVars	ResourceLoaderStartUpModule.php	Called right before ResourceLoaderStartUpModule::getConfig() returns.
1.1801.18.0	ResourceLoaderGetStartupModules	ResourceLoaderStartUpModule.php	Run once the startup module is being generated.
1.1701.17.0	ResourceLoaderRegisterModules	ResourceLoader.php	Allows registering of modules with ResourceLoader.
1.1901.19.0	ResourceLoaderTestModules	ResourceLoader.php	Add new javascript testing modules. This is called after the addition of MediaWiki core test suites.
1.1101.11.0	RevisionInsertComplete	Revision.php	Called after a revision is inserted into the DB
1.1101.11.0	SavePreferences	SpecialPreferences.php	Called at the end of PreferencesForm::savePreferences; returning false prevents the preferences from being saved.
1.1601.16.0	SearchableNamespaces	SearchEngine.php	An option to modify which namespaces are searchable.
1.2801.28.0	SearchDataForIndex	SearchEngine.php	Allows to provide custom content fields when indexing a document.
1.1601.16.0	SearchEngineReplacePrefixesComplete	SearchEngine.php	Run after SearchEngine::replacePrefixes().
1.1201.12.0	SearchGetNearMatch	SearchEngine.php	An extra chance for exact-title-matches in "go" searches.
1.1601.16.0	SearchGetNearMatchBefore	SearchEngine.php	Perform exact-title-matches in "go" searches before the normal operations.
1.1601.16.0	SearchGetNearMatchComplete	SearchEngine.php	A chance to modify exact-title-matches in "go" searches.
1.2801.28.0	SearchIndexFields	SearchEngine.php	Add fields to search index mapping.
1.2001.20.0	SearchResultInitFromTitle	SearchEngine.php	Set the revision used when displaying a page in search results.
1.1001.10.0	SearchUpdate	SearchUpdate.php	Prior to search update completion
1.27701.27.0	SecuritySensitiveOperationStatus	AuthManager.php	Affect the return value from AuthManager::securitySensitiveOperationStatus()
1.27701.27.0	SessionCheckInfo	SessionManager.php	Validate session info as it's being loaded from storage
1.27701.27.0	SessionMetadata	SessionBackend.php	Add metadata to a session being saved
1.1401.14.0	SetupAfterCache	Setup.php	Called in Setup.php, after cache objects are set
1.1701.17.0	SetupUserMessageArticle	User.php	Called in User::leaveUserMessage() before anything has been posted to the article.
1.1601.16.0	ShowMissingArticle	Article.php	Called when generating the output for a non-existent page
1.1101.11.0	ShowRawCssJs	Article.php	Customise the output of raw CSS and JavaScript in page views
1.1601.16.0	ShowSearchHitTitle	SpecialSearch.php	Customise display of search hit title/link.
1.0701.7.0	SiteNoticeAfter	GlobalFunctions.php	After site notice is determined
1.0701.7.0	SiteNoticeBefore	GlobalFunctions.php	Before site notice is determined
1.1101.11.0	SkinAfterBottomScripts	Skin.php	At the end of Skin::bottomScripts()
1.1401.14.0	SkinAfterContent	Skin.php	Allows extensions to add text after the page content and article metadata.
1.1401.14.0	SkinBuildSidebar	Skin.php	At the end of Skin::buildSidebar()
1.2401.24.0	SidebarBeforeOutput	Skin.php	Directly before the Sidebar is output
1.1601.16.0	SkinCopyrightFooter	Skin.php	Allow for site and per-namespace customization of copyright notice.
???	SkinEditSectionLinks	Skin.php	Modify the section edit links. Called when section headers are created.
1.1701.17.0	SkinGetPoweredBy	Skin.php	Called when generating the code used to display the "Powered by MediaWiki" icon.
1.1201.12.0	SkinSubPageSubtitle	Skin.php	Called before the list of subpage links on top of a subpage is generated
1.0601.6.0	SkinTemplateBuildContentActionUrlsAfterSpecialPage	SkinTemplate.php	after the single tab when showing a special page
1.0601.6.0	SkinTemplateBuildNavUrlsNav_urlsAfterPermalink	SkinTemplate.php	after creating the "permanent link" tab
1.0501.5.0	SkinTemplateContentActions	SkinTemplate.php	Alter the "content action" links in SkinTemplates
1.2301.23.0	SkinTemplateGetLanguageLink	SkinTemplate.php	Called after building the data for a language link from which the actual html is constructed.
1.1601.16.0	SkinTemplateNavigation	SkinTemplate.php	Alter the structured navigation links in SkinTemplate
1.1001.10.0	SkinTemplateOutputPageBeforeExec	SkinTemplate.php	Before SkinTemplate::outputPage() starts page output
1.0601.6.0	SkinTemplatePreventOtherActiveTabs	SkinTemplate.php	use this to prevent showing active tabs
1.0601.6.0	SkinTemplateSetupPageCss	SkinTemplate.php	use this to provide per-page CSS
1.1801.18.0	SkinTemplateNavigation::SpecialPage	SkinTemplate.php	Called on special pages after the special tab is added but before variants have been added
1.1201.12.0	SkinTemplateTabAction	SkinTemplate.php	Override SkinTemplate::tabAction().
1.0601.6.0	SkinTemplateTabs	SkinTemplate.php	called when finished to build the actions tabs
1.1301.13.0	SkinTemplateToolboxEnd	skins/Monobook.php, skins/Modern.php	Called by SkinTemplate skins after toolbox links have been rendered (useful for adding more)
1.1801.18.0	SkinTemplateNavigation::Universal	SkinTemplate.php	Called on both content and special pages after variants have been added
1.1501.15.0	SoftwareInfo	SpecialVersion.php	Called by Special:Version for returning information about the software
1.2401.24.0	SpecialBlockModifyFormFields	SpecialContributions.php	Add or modify block fields of Special:Block
1.0501.5.0	SpecialContributionsBeforeMainOutput	SpecialBlock.php	Before the form on Special:Contributions
1.2801.28.0	SpecialContributions::formatRow::flags	ContribsPager.php	Called before rendering a Special:Contributions row.
1.1301.13.0	SpecialListusersDefaultQuery	SpecialListusers.php	Called right before the end of UsersPager::getDefaultQuery()
1.1301.13.0	SpecialListusersFormatRow	SpecialListusers.php	Called right before the end of UsersPager::formatRow()
1.1301.13.0	SpecialListusersHeader	SpecialListusers.php	Called before closing the <fieldset> in UsersPager::getPageHeader()
1.1301.13.0	SpecialListusersHeaderForm	SpecialListusers.php	Called before adding the submit button in UsersPager::getPageHeader()
1.1301.13.0	SpecialListusersQueryInfo	SpecialListusers.php	Called right before the end of UsersPager::getQueryInfo()
1.0601.6.0	SpecialMovepageAfterMove	SpecialMovepage.php	Called after a page is moved.
1.1801.18.0	SpecialNewPagesFilters	SpecialNewpages.php	Called after building form options at NewPages.
1.0701.7.0	SpecialPage_initList	SpecialPage.php	Called when the list of Special Pages is populated. Hook gets a chance to change the list to hide/show pages
1.2001.20.0	SpecialPageAfterExecute	SpecialPage.php	Called after SpecialPage::execute().
1.2001.20.0	SpecialPageBeforeExecute	SpecialPage.php	Called before SpecialPage::execute().
1.0601.6.0	SpecialPageExecuteAfterPage	SpecialPage.php	called after executing a special page
1.0601.6.0	SpecialPageExecuteBeforeHeader	SpecialPage.php	called before setting the header text of the special page
1.0601.6.0	SpecialPageExecuteBeforePage	SpecialPage.php	called after setting the special page header text but before the main execution
1.1801.18.0	SpecialPasswordResetOnSubmit	SpecialPasswordReset.php	Called when executing a form submission on Special:PasswordReset.
1.1601.16.0	SpecialRandomGetRandomTitle	SpecialRandompage.php	Modify the selection criteria for Special:Random
1.1801.18.0	SpecialRecentChangesFilters	SpecialRecentchanges.php	Called after building form options at RecentChanges
1.1301.13.0	SpecialRecentChangesPanel	SpecialRecentchanges.php	called when building form options in SpecialRecentChanges
1.1301.13.0	SpecialRecentChangesQuery	SpecialRecentchanges.php	called when building sql query for SpecialRecentChanges
1.1901.19.0	SpecialSearchCreateLink	SpecialSearch.php	Called when making the message to create a page or go to the existing page.
1.0601.6.0	SpecialSearchNogomatch	SpecialSearch.php	called when user clicked the "Go" button but the target doesn't exist
1.1301.13.0	SpecialSearchNoResults	SpecialSearch.php	called before search result display when there are no matches
1.1901.19.0	SpecialSearchPowerBox	SpecialSearch.php	The equivalent of SpecialSearchProfileForm for the advanced form, a.k.a. power search box
1.1801.18.0	SpecialSearchProfileForm	SpecialSearch.php	allows modification of search profile forms
1.1601.16.0	SpecialSearchProfiles	SpecialSearch.php	allows modification of search profiles
1.1301.13.0	SpecialSearchResults	SpecialSearch.php	called before search result display when there are matches
1.2601.26.0	SpecialSearchResultsAppend	SpecialSearch.php	Called after the list of search results HTML has been output.
1.2101.21.0	SpecialSearchResultsPrepend	SpecialSearch.php	Called immediately before returning HTML on the search results page. Useful for including an external search provider. To disable the output of MediaWiki search output, return false.
1.1801.18.0	SpecialSearchSetupEngine	SpecialSearch.php	allows passing custom data to search engine
1.1601.16.0	SpecialStatsAddExtra	SpecialStatistics.php	Can be used to add extra statistic at the end of Special:Statistics
1.1601.16.0	SpecialUploadComplete	SpecialUpload.php	Called after successfully uploading a file from Special:Upload
1.0601.6.0	SpecialVersionExtensionTypes	SpecialVersion.php	called when generating the extensions credits, use this to change the tables headers
1.1801.18.0	SpecialWatchlistFilters	SpecialWatchlist.php	Called after building form options at Watchlist.
1.1401.14.0	SpecialWatchlistQuery	SpecialWatchlist.php	Called when building sql query for SpecialWatchlist
1.1801.18.0	TestCanonicalRedirect	Wiki.php	Called when about to force a redirect to a canonical URL for a title when we have no other parameters on the URL.
1.1401.14.0	TitleArrayFromResult	TitleArray.php	called when creating an TitleArray object from a database result
1.1601.16.0	TitleGetRestrictionTypes	Title.php	Allows to modify the types of protection that can be applied.
1.2001.20.0	TitleIsAlwaysKnown	Title.php	Allows overriding default behaviour for determining if a page exists.
1.1901.19.0	TitleIsCssOrJsPage	Title.php	Called when determining if a page is a CSS or JS page.
1.1901.19.0	TitleIsMovable	Title.php	Called when determining if it is possible to move a page.
1.1901.19.0	TitleIsWikitextPage	Title.php	Called when determining if a page is a wikitext or should be handled by seperate handler (via ArticleViewCustom).
1.0401.4.0	TitleMoveComplete	Title.php	Occurs whenever a request to move an article is completed
1.1901.19.0	TitleReadWhitelist	Title.php	Called at the end of read permissions checks, just before adding the default error message if nothing allows the user to read the page.
1.1801.18.0	UndeleteForm::showHistory	SpecialUndelete.php	Called in UndeleteForm::showHistory, after a PageArchive object has been created but before any further processing is done.
1.1801.18.0	UndeleteForm::showRevision	SpecialUndelete.php	Called in UndeleteForm::showRevision, after a PageArchive object has been created but before any further processing is done.
1.1801.18.0	UndeleteForm::undelete	SpecialUndelete.php	Called un UndeleteForm::undelete, after checking that the site is not in read-only mode, that the Title object is not null and after a PageArchive object has been constructed but before performing any further processing.
1.0901.9.0	UndeleteShowRevision	SpecialUndelete.php	called when showing a revision in Special:Undelete
1.1701.17.0	UnitTestsList	ExtensionsTestSuite.php	Add tests that should be run as part of the unit test suite.
1.0401.4.0	UnknownAction	Wiki.php	Used to add new query-string actions
1.0401.4.0	UnwatchArticle	Article.php	Occurs whenever the software receives a request to unwatch an article
1.0401.4.0	UnwatchArticleComplete	Article.php	Occurs after the unwatch article request has been processed
1.1601.16.0	UploadCreateFromRequest	UploadBase.php	When UploadBase::createFromRequest has been called.
1.0641.6.4	UploadComplete	SpecialUpload.php	Called when a file upload has completed.
1.1601.16.0	UploadFormInitDescriptor	SpecialUpload.php	Occurs after the descriptor for the upload form as been assembled.
1.1601.16.0	UploadFormSourceDescriptors	SpecialUpload.php	Occurs after the standard source inputs have been added to the descriptor.
1.0901.9.0	UploadForm:BeforeProcessing	SpecialUpload.php	Called just before the file data (for example description) are processed, so extensions have a chance to manipulate them.
1.0901.9.0	UploadForm:initial	SpecialUpload.php	Called just before the upload form is generated
1.0601.6.0	UploadVerification	SpecialUpload.php	Called when a file is uploaded, to allow extra file verification to take place (deprecated)
1.1701.17.0	UploadVerifyFile	SpecialUpload.php	Called when a file is uploaded, to allow extra file verification to take place (preferred)
1.1801.18.0	UserAddGroup	User.php	Called when adding a group to an user.
1.1301.13.0	UserArrayFromResult	UserArray.php	called when creating an UserArray object from a database result
1.0601.6.0	userCan	Title.php	To interrupt/advise the "user can do X to Y article" check
1.1201.12.0	UserCanSendEmail	User.php	To override User::canSendEmail() permission check
1.0571.5.7	UserClearNewTalkNotification	User.php	called when clearing the "You have new messages!" message
1.110 1.11.0	UserEffectiveGroups	User.php	Called in User::getEffectiveGroups()
1.130 1.13.0	UserGetAllRights	User.php	After calculating a list of all available rights
1.180 1.18.0	UserGetDefaultOptions	User.php	Called after fetching the core default user options.
1.130 1.13.0	UserGetEmail	User.php	Called when getting an user email address
1.130 1.13.0	UserGetEmailAuthenticationTimestamp	User.php	Called when getting the timestamp of email authentification
1.110 1.11.0	UserGetImplicitGroups	User.php	Called in User::getImplicitGroups()
1.180 1.18.0	UserGetLanguageObject	User.php	Called when getting user's interface language object.
1.140 1.14.0	UserGetReservedNames	User.php	Allows to modify $wgReservedUsernames at run time.
1.1101.11.0	UserGetRights	User.php	Called in User::getRights()
1.1601.16.0	UserIsBlockedFrom	User.php	Check if a user is blocked from a specific page (for specific block exemptions).
1.1401.14.0	UserIsBlockedGlobally	User.php	Check if user is blocked on all wikis.
1.1401.14.0	UserLoadAfterLoadFromSession	User.php	Called to authenticate users on external/environmental means; occurs after session is loaded
1.1301.13.0	UserLoadDefaults	User.php	Called when loading a default user
1.1501.15.0	UserLoadFromDatabase	User.php	Called when loading a user from the database
1.1301.13.0	UserLoadFromSession	User.php	Called to authenticate users on external/environmental means
1.1501.15.0	UserLoadOptions	User.php	Called when user options/preferences are being loaded from the database
1.27701.27.0	UserLoggedIn	AuthManager.php	Called after a user is logged in
1.0401.4.0	UserLoginComplete	SpecialUserlogin.php	Occurs after a user has successfully logged in
1.0401.4.0	UserLogout	SpecialUserlogin.php	Occurs when the software receives a request to log out
1.0401.4.0	UserLogoutComplete	SpecialUserlogin.php	Occurs after a user has successfully logged out
1.1401.14.0	User::mailPasswordInternal	SpecialUserlogin.php	Before creation and mailing of a user's new temporary password
1.2401.24.0	UserMailerChangeReturnPath	UserMailer.php	Called to generate a VERP return address when UserMailer sends an email, with a bounce handling extension.
1.1801.18.0	UserRemoveGroup	User.php	Called when removing a group from an user.
1.0571.5.7	UserRetrieveNewTalks	User.php	called when retrieving "You have new messages!" message(s)
1.0601.6.0	UserRights	SpecialUserrights.php	Called after a user's group memberships are changed
1.1401.14.0	UserrightsChangeableGroups	SpecialUserrights.php	Called after the list of groups that can be manipulated via Special:UserRights is populated, but before it is returned.
1.1501.15.0	UserSaveOptions	User.php	Called just before saving user preferences/options
1.1301.13.0	UserSaveSettings	User.php	Called when saving user settings
1.1301.13.0	UserSetCookies	User.php	Called when setting user cookies
1.1301.13.0	UserSetEmail	User.php	Called when changing user email address
1.1301.13.0	UserSetEmailAuthenticationTimestamp	User.php	Called when setting the timestamp of email authentification
1.0801.8.0	UserToggles	User.php	Called before returning "user toggle names"
1.1901.19.0	UserToolLinksEdit	Linker.php	Contribs | Block)"
1.1801.18.0	WantedPages::getQueryInfo	SpecialWantedPages.php	Called in WantedPagesPage::getQueryInfo(), can be used to alter the SQL query which gets the list of wanted pages.
1.1501.15.0	WantedPages::getSQL	SpecialWantedPages.php	Called in WantedPagesPage::getSQL(), can be used to alter the SQL query which gets the list of wanted pages DEPRECATED: Use WantedPages::getQueryInfo
1.0401.4.0	WatchArticle	Article.php	Occurs whenever the software receives a request to watch an article
1.0401.4.0	WatchArticleComplete	Article.php	Occurs after the watch article request has been processed
1.1701.17.0	WatchlistEditorBuildRemoveLine	WatchlistEditor.php	Occurs when building remove lines in Special:Watchlist/edit
1.1901.19.0	WebRequestPathInfoRouter	WebRequest.php	While building the PathRouter to parse the REQUEST_URI.
1.2001.20.0	wfShellWikiCmd	GlobalFunctions.php	Called when generating a shell-escaped command line string to run a maintenance script.
1.1501.15.0	WikiExporter::dumpStableQuery	Export.php	Get the SELECT query for "stable" revisions dumps
1.0601.6.0	wgQueryPages	QueryPage.php	called when initialising $wgQueryPages
1.1601.16.0	XmlDumpWriterOpenPage	Export.php	Called at the end of XmlDumpWriter::openPage, to allow extra metadata to be added.
1.1601.16.0	XmlDumpWriterWriteRevision	Export.php	Called at the end of a revision in an XML dump, to add extra metadata.
1.1801.18.0	XMPGetInfo	media/XMPInfo.php	Called when obtaining the list of XMP tags to extract.
1.1801.18.0	XMPGetResults	media/XMP.php	Called just before returning the results array of parsing xmp data.

Hooks grouped by version

To see hooks grouped by version go to the table above and click the arrow symbol in the version table header.

See also

• Special:MyLanguage/Manual:$wgHooks
• Category:Hook extensions
• Special:MyLanguage/Manual:Tag extensions
• Special:MyLanguage/Manual:Parser functions
• hooks.txt
• Some Examples

[[Category:HooksTemplate:Translation]] [[Category:Customization techniquesTemplate:Translation|Hooks]] [[Category:MediaWiki hooksTemplate:Translation| ]]