Extension hook registry

The Hooks mechanism in MediaWiki is a powerful tool for extension authors to modify the behavior of MediaWiki while minimizing, if not eliminating, the need to hack the codebase. A logical extension of this idea is to place hooks in extensions themselves, in order to allow other developers to extend the extensions. This page provides a listing and documentation for hooks provided by extension authors. To document your hook:

1. create a page named after the hook under your extension, e.g. Extension:MyExtension/MyHook. Note: this naming convention allows defaults and category links in Template:Extension and Template:SeeCustomHook to work properly
2. place the Template:Extension in your page and fill in the parameter values
3. add a row for your hook in the table below

Extension hooks by parent extension

Parent extension	Version Extension	Revision SVN	Hook	Description
ArticleComments	0.4	r73901	ArticleCommentsSpamCheck	Called on comment submission for spam detection.
Backup			Backup	Hook event called when a page change is effected
CategoryHook	0.2		CategoryHook	Adds a hook allowing articles to be added to additional categories based on wikitext content.
CentralAuth		1.13	CentralAuthWikiList	Get the list of wikis in which CentralAuth is active
ContactPage			ContactForm	Can be used to manipulate most of the values related to the contact message: the sender, the receiver, the subject and the actual contact message text.
ContactPage		r60638	ContactFormBeforeMessage	Can be used to add new fields to Special:Contact. Two parameters, $contactForm (Object; instance of EmailContactForm class) and &$form (HTML used to generate the form).
ContactPage			ContactFromComplete	Takes the same parameters as ContactForm hook does.
DatabaseFetchObject	0.1		DatabaseFetchObject	Hook for checking permissions in any context where database page contents are retrieved.
Echo			BeforeCreateEchoEvent	Allows registration of custom Echo events
EmailDomainCheck	0.1		EmailDomainCheck	Only allows registrations from a specific email domain
GoogleNewsSitemap			GoogleNewsSitemap::Query	Modifies the query used by GoogleNewsSitemap (used for flagged revs support)
ImagePageEx			ImagePageEx	Hooks for trapping delete related changes in NS_IMAGE
LDAP Authentication	1.1c+		SetUsernameAttributeFromLDAP	Allows hook function to set the LDAP username from various attributes returned by a query.
MobileFrontend	3b5e3c07f39ef070389a00597b996912f47cad7b		EnableMobileModules	Allow other extensions to add modules depending on the MobileFrontend mode
NewUserMessage	3.1		CreateNewUserMessage	Hook for modules that allows them to override the default new user message.
PagesOnDemand	0.1		PagesOnDemand	Hook for modules that create new pages from templates when links to nonexistent pages are followed
Renameuser		1.11	RenameUserAbort	Allow other extensions to abort a user rename
Renameuser		1.11	RenameUserComplete	After a successful user rename
Renameuser		1.13	RenameUserPreRename	Before renaming a user
Renameuser		r55189	RenameUserSQL	In the constructor of RenameuserSQL class, allows adding tables to the array of tables that Renameuser should update on rename
Renameuser		1.13	RenameUserWarning	Get warnings when renaming a user
Shibboleth Authentication			ShibUpdateUser	Hook event called before user information gets updated on login (for setting the name/mail from Shibboleth)
UserMerge	1.6.21	1.19 r89147	DeleteAccount	Trigger update actions elsewhere (e.g. in OpenID) when UserMerge has deleted an account
UserMerge	1.6.21	1.19 r89147	MergeAccountFromTo	Trigger update actions elsewhere (e.g. in OpenID) when UserMerge has merged one account to another
SphinxSearch	0.7.2	r73342	SphinxSearchBeforeResults	Control various search parameters before search client is instantiated
SphinxSearch	0.7.2	r73342	SphinxSearchBeforeQuery	Control search term and sphinx client before search is executed