Returning false makes less sense for events where the action is complete, and
will normally be ignored.
+Note that none of the examples made use of create_function() as a way to
+attach a function to a hook. This is known to cause problems (notably with
+Special:Version), and should be avoided when at all possible.
+
==Using hooks==
A calling function or method uses the wfRunHooks() function to run the hooks
$autoblockip: The IP going to be autoblocked.
$block: The block from which the autoblock is coming.
+'AbortDiffCache': Can be used to cancel the caching of a diff
+&$diffEngine: DifferenceEngine object
+
'AbortLogin': Return false to cancel account login.
$user: the User object being authenticated against
$password: the password being submitted, not yet checked for validity
on &action=edit.
$EditPage : the EditPage object
-'AlternateSkinPreferences': before creating the content of the 'skin'
-tab in preferences
-$prefsform : the PreferencesForm object
+'APIAfterExecute': after calling the execute() method of an API module.
+Use this to extend core API modules.
+&$module: Module object
'APIEditBeforeSave': before saving a page with api.php?action=edit,
after processing request parameters. Return false to let the request
$text : the new text of the article (has yet to be saved)
$resultArr : data in this array will be added to the API result
+'APIGetAllowedParams': use this hook to modify a module's parameters.
+&$module: Module object
+&$params: Array of parameters
+
+'APIGetParamDescription': use this hook to modify a module's parameter
+descriptions.
+&$module: Module object
+&$desc: Array of parameter descriptions
+
+'APIQueryAfterExecute': after calling the execute() method of an
+action=query submodule. Use this to extend core API modules.
+&$module: Module object
+
+'APIQueryGeneratorAfterExecute': after calling the executeGenerator()
+method of an action=query submodule. Use this to extend core API modules.
+&$module: Module object
+&$resultPageSet: ApiPageSet object
+
'APIQueryInfoTokens': use this hook to add custom tokens to prop=info.
Every token has an action, which will be used in the intoken parameter
and in the output (actiontoken="..."), and a callback function which
$tokenFunctions array and return true (returning false makes no sense)
$tokenFunctions: array(action => callback)
+'APIQueryRecentChangesTokens': use this hook to add custom tokens to list=recentchanges.
+Every token has an action, which will be used in the rctoken parameter
+and in the output (actiontoken="..."), and a callback function which
+should return the token, or false if the user isn't allowed to obtain
+it. The prototype of the callback function is func($pageid, $title, $rc)
+where $pageid is the page ID of the page associated to the revision the
+token is requested for, $title the associated Title object and $rc the
+associated RecentChange object. In the hook, just add your callback to the
+$tokenFunctions array and return true (returning false makes no sense)
+$tokenFunctions: array(action => callback)
+
'ArticleAfterFetchContent': after fetching content of an article from the database
$article: the article (object) being loaded from the database
$content: the content (string) of the article
'ArticleEditUpdateNewTalk': before updating user_newtalk when a user talk page was changed
$article: article (object) of the user talk page
+'ArticleEditUpdates': when edit updates (mainly link tracking) are made when an article has been changed
+$article: the article (object)
+$editInfo: data holder that includes the parser output ($editInfo->output) for that page after the change
+$changed: bool for if the page was changed
+
'ArticleEditUpdatesDeleteFromRecentchanges': before deleting old entries from recentchanges table, return false to not delete old entries
$article: article (object) being modified
$flags: Flags passed to Article::doEdit()
$revision: New Revision of the article
-'ArticleSaveComplete': after an article is saved
-$article: the article (object) saved
-$user: the user (object) who saved the article
-$text: the new article text
-$summary: the article summary (comment)
-$isminor: minor flag
-$iswatch: watch flag
-$section: section #
-
-wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text, $summary, $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
-
'ArticleUndelete': When one or more revisions of an article are restored
$title: Title corresponding to the article restored
$create: Whether or not the restoration caused the page to be created
$isbn: ISBN to show information for
$output: OutputPage object in use
-'BrokenLink': Before the HTML is created for a broken (i.e. red) link
-&$linker: Linker instance
-$nt: the page title
-$query: the URL query string passed in
-&$u: the URL of this link
-&$style: the inline CSS style
-&$prefix: a prefix prepended to the linked text
-&$text: the text placed by the user in the wiki-link
-&$inside: any additional alphanumeric characters placed after the wiki-link,
-that are made part of the link text
-&$trail: text placed immediately after the HTML link
-
'CategoryPageView': before viewing a categorypage in CategoryPage::view
$catpage: CategoryPage instance
$article: article (object) being viewed
$oldid: oldid (int) being viewed
+'DoEditSectionLink': Override the HTML generated for section edit links
+$skin: Skin object rendering the UI
+$title: Title object for the title being linked to (may not be the same as
+ $wgTitle, if the section is included from a template)
+$section: The designation of the section being pointed to, to be included in
+ the link, like "§ion=$section"
+$tooltip: The default tooltip. Escape with htmlspecialchars() before using.
+ By default, this is wrapped in the 'editsectionhint' message.
+$result: The HTML to return, prefilled with the default plus whatever other
+ changes earlier hooks have made
+
'EditFilter': Perform checks on an edit
$editor: Edit form (see includes/EditPage.php)
$text: Contents of the edit box
&$editpage: The current EditPage object
&$buttons: Array of edit buttons "Save", "Preview", "Live", and "Diff"
-'EditSectionLink': Override the return value of Linker::editSectionLink()
-$skin: Skin rendering the UI
-$title: Title being linked to
-$section: Section to link to
-$link: Default link
-$result: Result (alter this to override the generated links)
-
-'EditSectionLinkForOther': Override the return value of Linker::editSectionLinkForOther()
+'EditSectionLink': Do not use, use DoEditSectionLink instead.
$skin: Skin rendering the UI
$title: Title being linked to
$section: Section to link to
-$hint: Anchor title/tooltip attributes
$link: Default link
$result: Result (alter this to override the generated links)
'getUserPermissionsErrorsExpensive': Absolutely the same, but is called only
if expensive checks are enabled.
+'HTMLCacheUpdate::doUpdate': After cache invalidation updates are inserted into the job queue.
+$title: Title object, pages linked to this title are purged.
+
'ImageBeforeProduceHTML': Called before producing the HTML created by a wiki
image insertion. You can skip the default logic entirely by returning
false, or just modify a few things using call-by-reference.
$specialPageAliases: associative array of magic words synonyms
$lang: laguage code (string)
+'LinkBegin': Used when generating internal and interwiki links in
+Linker::link(), before processing starts. Return false to skip default proces-
+sing and return $ret. See documentation for Linker::link() for details on the
+expected meanings of parameters.
+$skin: the Skin object
+$target: the Title that the link is pointing to
+&$text: the contents that the <a> tag should have (raw HTML); null means "de-
+ fault"
+&$customAttribs: the HTML attributes that the <a> tag should have, in associa-
+ tive array form, with keys and values unescaped. Should be merged with de-
+ fault values, with a value of false meaning to suppress the attribute.
+&$query: the query string to add to the generated URL (the bit after the "?"),
+ in associative array form, with keys and values unescaped.
+&$options: array of options. Can include 'known', 'broken', 'noclasses'.
+&$ret: the value to return if your hook returns false.
+
+'LinkEnd': Used when generating internal and interwiki links in Linker::link(),
+just before the function returns a value. If you return true, an <a> element
+with HTML attributes $attribs and contents $text will be returned. If you re-
+turn false, $ret will be returned.
+$skin: the Skin object
+$target: the Title object that the link is pointing to
+$options: the options. Will always include either 'known' or 'broken', and may
+ include 'noclasses'.
+&$text: the final (raw HTML) contents of the <a> tag, after processing.
+&$attribs: the final HTML attributes of the <a> tag, after processing, in asso-
+ ciative array form.
+&$ret: the value to return if your hook returns false.
+
'LinkerMakeExternalImage': At the end of Linker::makeExternalImage() just before the return
&$url: the image url
&$alt: the image's alt text
'MagicWordwgVariableIDs': When definig new magic words IDs. DEPRECATED: Use LanguageGetMagic hook instead
$variableIDs: array of strings
+'MakeGlobalVariablesScript': called right before Skin::makeVariablesScript is executed
+&$vars: variable (or multiple variables) to be added into the output
+ of Skin::makeVariablesScript
+&$wgUser: user (object) currently loading the skin
+
'MarkPatrolled': before an edit is marked patrolled
$rcid: ID of the revision to be marked patrolled
$user: the user (object) marking the revision as patrolled
whether to use the content language (true) or site language (false) (bool)
&$transform: whether or not to expand variables and templates in the message (bool)
+'OldChangesListRecentChangesLine': Customize entire Recent Changes line.
+&$changeslist: The OldChangesList instance.
+&$s: HTML of the form "<li>...</li>" containing one RC entry.
+&$rc: The RecentChange object.
+
'OpenSearchUrls': Called when constructing the OpenSearch description XML.
Hooks can alter or append to the array of URLs for search & suggestion formats.
&$urls: array of associative arrays with Url element attributes
$parserOutput: the parserOutput (object) that corresponds to the page
$text: the text that will be displayed, in HTML (string)
+'OutputPageCheckLastModified': when checking if the page has been modified since the last visit
+&$modifiedTimes: array of timestamps, the following keys are set: page, user, epoch
+
'OutputPageParserOutput': after adding a parserOutput to $wgOut
$out: OutputPage instance (object)
$parserOutput: parserOutput instance being added in $out
&$text: bottomScripts Text
Append to $text to add additional text/scripts after the stock bottom scripts.
+'SkinAfterContent': Allows extensions to add text after the page content and
+article metadata.
+&$data: (string) Text to be printed out directly (without parsing)
+This hook should work in all skins. Just set the &$data variable to the text
+you're going to add.
+
+'SkinBuildSidebar': At the end of Skin::buildSidebar()
+$skin: Skin object
+&$bar: Sidebar contents
+Modify $bar to add or modify sidebar portlets.
+
'SkinSubPageSubtitle': At the beginning of Skin::subPageSubtitle()
$skin: Skin object
&$subpages: Subpage links HTML
$oldTitle: old title (object)
$newTitle: new title (object)
-'SpecialPageExecuteAfterPage': called after executing a special page
-Warning: Not all the special pages call this hook
-$specialPage: SpecialPage object
-$par: paramter passed to the special page (string)
-$funct: function called to execute the special page
-
-'SpecialPageExecuteBeforeHeader': called before setting the header text of the special page
-Warning: Not all the special pages call this hook
-$specialPage: SpecialPage object
-$par: paramter passed to the special page (string)
-$funct: function called to execute the special page
-
-'SpecialPageExecuteBeforePage': called after setting the special page header text but before the main execution
-Warning: Not all the special pages call this hook
-$specialPage: SpecialPage object
-$par: paramter passed to the special page (string)
-$funct: function called to execute the special page
-
'SpecialPage_initList': called when setting up SpecialPage::$mList, use this hook to remove a core special page
$list: list (array) of core special pages
'SpecialVersionExtensionTypes': called when generating the extensions credits, use this to change the tables headers
$extTypes: associative array of extensions types
+'TitleArrayFromResult': called when creating an TitleArray object from a database result
+&$titleArray: set this to an object to override the default object returned
+$res: database result used to create the object
+
'TitleMoveComplete': after moving an article (title)
$old: old title
$nt: new title
'UploadComplete': Upon completion of a file upload
$uploadForm: Upload form object. File can be accessed by $uploadForm->mLocalFile.
+'User::mailPasswordInternal': before creation and mailing of a user's new temporary password
+$user: the user who sent the message out
+$ip: IP of the user who sent the message out
+$u: the account whose new password will be set
+
'UserArrayFromResult': called when creating an UserArray object from a database result
&$userArray: set this to an object to override the default object returned
$res: database result used to create the object
'UserGetImplicitGroups': Called in User::getImplicitGroups()
&$groups: List of implicit (automatically-assigned) groups
+'UserGetReservedNames': allows to modify $wgReservedUsernames at run time
+*&$reservedUsernames: $wgReservedUsernames
+
'UserGetRights': Called in User::getRights()
$user: User to get rights for
&$rights: Current rights
$user: user object
$name: user name
-'UserLoadFromSession': called to authenticate users on external/environmental means
+'UserLoadFromSession': called to authenticate users on external/environmental means; occurs before session is loaded
$user: user object being loaded
&$result: set this to a boolean value to abort the normal authentification process
+'UserLoadAfterLoadFromSession': called to authenticate users on external/environmental means; occurs after session is loaded
+$user: user object being loaded
+
'UserLoginComplete': after a user has logged in
$user: the user object that was created on login
$inject_html: Any HTML to inject after the "logged in" message.
$add : Array of strings corresponding to groups added
$remove: Array of strings corresponding to groups removed
+'UserrightsChangeableGroups': allows modification of the groups a user may add or remove via Special:UserRights
+$userrights : UserrightsPage object
+$user : User object of the current user
+$addergroups : Array of groups that the user is in
+&$groups : Array of groups that can be added or removed. In format of
+ array(
+ 'add' => array( addablegroups ),
+ 'remove' => array( removablegroups ),
+ 'add-self' => array( addablegroups to self ),
+ 'remove-self' => array( removable groups from self )
+ )
+
+'UserRights::showEditUserGroupsForm': called right before the form to edit group memberships at Special:UserRights is shown
+&$user: User or UserRightsProxy you're editing
+&$addable: Array of groups you can add the user into
+&$removable: Array of groups that you can remove the user from
+
'UserRetrieveNewTalks': called when retrieving "You have new messages!" message(s)
$user: user retrieving new talks messages
$talks: array of new talks page(s)