This is a list of known events and parameters; please add to it if you're going
to add events to the MediaWiki code.
+'AbortAutoAccount': Return false to cancel automated local account creation, where normally authentication against an external auth plugin would be creating a local account.
+$user: the User object about to be created (read-only, incomplete)
+&$abortMsg: out parameter: name of error message to be displayed to user
+
'AbortAutoblock': Return false to cancel an autoblock.
$autoblockip: The IP going to be autoblocked.
$block: The block from which the autoblock is coming.
$err: error message
$reason: the reason for the move (added in 1.13)
-'AbortNewAccount': Return false to cancel account creation.
+'AbortNewAccount': Return false to cancel explicit account creation.
$user: the User object about to be created (read-only, incomplete)
-$message: out parameter: error message to display on abort
+&$msg: out parameter: name of error message to display on abort
+
+'ActionBeforeFormDisplay': before executing the HTMLForm object
+$name: name of the action
+&$form: HTMLForm object
+$article: Article object
+
+'ActionModifyFormFields': before creating an HTMLForm object for a page action;
+ allows to change the fields on the form that will be generated
+$name: name of the action
+&$fields: HTMLForm descriptor array
+$article: Article object
'AddNewAccount': after a user account is created
$user: the User object that was created. (Parameter added in 1.7)
$sRevCount: Number of sucessfully imported revisions
$pageInfo: associative array of page information
-'AfterUserMessage': After a user message has been left, this hook is
-called to take care of any cleanup.
-$user: The user who we left the message for.
-$article: The article the message was left on.
-$subject: The subject of the message
-$text: The text of the message.
-$signature: The signature we used.
-$summary: The edit summary.
-$editor: The editor that performed the edit.
-
'AjaxAddScript': Called in output page just before the initialisation
of the javascript ajax engine. The hook is only called when ajax
is enabled ( $wgUseAjax = true; ).
'APIQuerySiteInfoGeneralInfo': use this hook to add extra information to
the sites general information.
-&$module: the current ApiQuerySiteInfo module
+$module: the current ApiQuerySiteInfo module
&$results: array of results, add things here
'APIQueryUsersTokens': use this hook to add custom token to list=users.
Change $bad and return false to override. If an image is "bad", it is not
rendered inline in wiki pages or galleries in category pages.
-'BeforeGalleryFindFile': before an image is fetched for a gallery
-&$gallery,: the gallery object
-&$nt: the image title
-&$time: image timestamp
-
'BeforeInitialize': before anything is initialized in performRequestForTitle()
&$title: Title being used for request
&$article: The associated Article object
&$out: OutputPage object
&$skin: Skin object
+'BeforeParserFetchFileAndTitle': before an image is rendered by Parser
+$parser: Parser object
+$nt: the image title
+&$time: the image timestamp (use '0' to force a broken thumbnail)
+&$sha1: image base 36 sha1 (used to specify the file, $nt will be ignored if this is set)
+&$descQuery: query string to add to thumbnail URL
+
'BeforeParserFetchTemplateAndtitle': before a template is fetched by Parser
-&$parser: Parser object
-&$title: title of the template
+$parser: Parser object
+$title: title of the template
&$skip: skip this template and link it?
&$id: the id of the revision being parsed
-'BeforeParserMakeImageLinkObj': before an image is rendered by Parser
-&$parser: Parser object
-&$nt: the image title
-&$skip: skip this image and link it?
-&$time: the image timestamp
-
'BeforeParserrenderImageGallery': before an image gallery is rendered by Parser
&$parser: Parser object
&$ig: ImageGallery object
+'BeforeWelcomeCreation': before the welcomecreation message is displayed to a newly created user
+&$welcome_creation_msg: MediaWiki message name to display on the welcome screen to a newly created user account
+&$injected_html: Any HTML to inject after the "logged in" message of a newly created user account
+
'BitmapHandlerTransform': before a file is transformed, gives extension the
possibility to transform it themselves
$handler: BitmapHandler
'DatabaseOraclePostInit': Called after initialising an Oracle database
&$db: the DatabaseOracle object
+'Debug': called when outputting a debug log line via wfDebug() or wfDebugLog()
+$text: plaintext string to be output
+$group: null or a string naming a logging group (as defined in $wgDebugLogGroups)
+
'NewDifferenceEngine': Called when a new DifferenceEngine object is made
$title: the diff page title (nullable)
&$oldId: the actual old Id to use in the diff
$editPage: EditPage object
'EditPage::attemptSave': called before an article is
-saved, that is before insertNewArticle() is called
+saved, that is before Article::doEdit() is called
$editpage_Obj: the current EditPage object
'EditPage::importFormData': allow extensions to read additional data
$editToken: The user's edit token.
&$hookErr: Out-param for the error. Passed as the parameters to OutputPage::showErrorPage.
+'ExtensionTypes': called when generating the extensions credits, use this to change the tables headers
+&$extTypes: associative array of extensions types
+
'FetchChangesList': When fetching the ChangesList derivative for
a particular user
-&$user: User the list is being fetched for
+$user: User the list is being fetched for
&$skin: Skin object to be used with the list
&$list: List object (defaults to NULL, change it to an object
instance and return false override the list derivative used)
$user: user who performed the undeletion
$reason: reason
-'FormatUserMessage': Hook to format a message if you want to override
-the internal formatter.
-$subject: Title of the message.
-&$text: Text of the message.
-$signature: Signature that they would like to leave.
-
'GetAutoPromoteGroups': When determining which autopromote groups a user
is entitled to be in.
&$user: user to promote.
$url: string value as output (out parameter, can modify)
$query: query options passed to Title::getLocalURL()
+'GetMetadataVersion': modify the image metadata version currently in use. This is
+ used when requesting image metadata from a ForiegnApiRepo. Media handlers
+ that need to have versioned metadata should add an element to the end of
+ the version array of the form 'handler_name=version'. Most media handlers
+ won't need to do this unless they broke backwards compatibility with a
+ previous version of the media handler metadata output.
+&$version: Array of version strings
+
'GetPreferences': modify user preferences
$user: User whose preferences are being modified.
&$preferences: Preferences description array, to be fed to an HTMLForm object
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-
+&$html: the contents that the <a> tag should have (raw HTML); null means "de-
fault"
&$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-
'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-
+with HTML attributes $attribs and contents $html 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.
+&$html: the final (raw HTML) contents of the <a> tag, after processing.
&$attribs: the final HTML attributes of the <a> tag, after processing, in asso-
ciative array form.
&$ret: the value to return if your hook returns false.
&$revert: string that is displayed in the UI, similar to $comment.
$time: timestamp of the log entry (added in 1.12)
-'LogPageValidTypes': action being logged.
-DEPRECATED: Use $wgLogTypes
-&$type: array of strings
-
-'LogPageLogName': name of the logging page(s).
-DEPRECATED: Use $wgLogNames
-&$typeText: array of strings
-
-'LogPageLogHeader': strings used by wfMsg as a header.
-DEPRECATED: Use $wgLogHeaders
-&$headerText: array of strings
-
-'LogPageActionText': strings used by wfMsg as a header.
-DEPRECATED: Use $wgLogActions
-&$actionText: array of strings
+'MaintenanceRefreshLinksInit': before executing the refreshLinks.php maintenance script
+$refreshLinks: RefreshLinks object
'MagicWordMagicWords': When defining new magic word.
DEPRECATED: use $magicWords in a file listed in
$wcOnlySysopsCanPatrol: config setting indicating whether the user
must be a sysop to patrol the edit
-'MathAfterTexvc': after texvc is executed when rendering mathematics
-$mathRenderer: instance of MathRenderer
-$errmsg: error message, in HTML (string). Nonempty indicates failure
- of rendering the formula
-
'MediaWikiPerformAction': Override MediaWiki::performAction().
Use this to do something completely different, after the basic
globals have been set up, but before ordinary actions take place.
'SetupAfterCache': Called in Setup.php, after cache objects are set
-'SetupUserMessageArticle': Called in User::leaveUserMessage() before
-anything has been posted to the article.
-$user: The user who we left the message for.
-&$article: The article that will be posted to.
-$subject: The subject of the message
-$text: The text of the message.
-$signature: The signature we used.
-$summary: The edit summary.
-$editor: The editor that performed the edit.
-
'ShowMissingArticle': Called when generating the output for a non-existent page
$article: The article object corresponding to the page
&$special: NewPagesPager object (subclass of ReverseChronologicalPager)
$opts: FormOptions object containing special page options
&$conds: array of WHERE conditionals for query
+&tables: array of tables to be queried
+&$fields: array of columns to select
+&$join_conds: join conditions for the tables
+
+'SpecialNewPagesFilters': called after building form options at NewPages
+$special: the special page object
+&$filters: associative array of filter definitions. The keys are the HTML name/URL parameters.
+Each key maps to an associative array with a 'msg' (message key) and a 'default' value.
'SpecialPage_initList': called when setting up SpecialPage::$mList, use this
hook to remove a core special page
$list: list (array) of core special pages
+'SpecialPasswordResetOnSubmit': when executing a form submission on Special:PasswordReset
+$users: array of User objects
+$data: array of data submitted by the user
+&$error: string, error code (message name) used to describe to error (out paramater).
+ The hook needs to return false when setting this, otherwise it will have no effect.
+
'SpecialRandomGetRandomTitle': called during the execution of Special:Random,
use this to change some selection criteria or substitute a different title
&$randstr: The random number from wfRandom()
&$title: If the hook returns false, a Title object to use instead of the
result from the normal query
+'SpecialRecentChangesFilters': called after building form options at RecentChanges
+$special: the special page object
+&$filters: associative array of filter definitions. The keys are the HTML name/URL parameters.
+Each key maps to an associative array with a 'msg' (message key) and a 'default' value.
+
'SpecialRecentChangesPanel': called when building form options in
SpecialRecentChanges
&$extraOpts: array of added items, to which can be added
&$join_conds: join conditions for the tables
$opts: FormOptions for this request
&$query_options: array of options for the database request
-&$select: String '*' or array of columns to select
+&$select: Array of columns to select
'SpecialSearchGo': called when user clicked the "Go"
&$title: title object generated from the text entered by the user
'SpecialSearchProfiles': allows modification of search profiles
&$profiles: profiles, which can be modified.
+'SpecialSearchProfileForm': allows modification of search profile forms
+$search: special page object
+&$form: String: form html
+$profile: String: current search profile
+$term: String: search term
+$opts: Array: key => value of hidden options for inclusion in custom forms
+
+'SpecialSearchSetupEngine': allows passing custom data to search engine
+$search: special page object
+$profile: String: current search profile
+$engine: the search engine
+
'SpecialSearchResults': called before search result display when there
are matches
$term: string of search term
use this to change the tables headers
$extTypes: associative array of extensions types
+'SpecialWatchlistFilters': called after building form options at Watchlist
+$special: the special page object
+&$filters: associative array of filter definitions. The keys are the HTML name/URL parameters.
+Each key maps to an associative array with a 'msg' (message key) and a 'default' value.
+
'SpecialWatchlistQuery': called when building sql query for SpecialWatchlist
&$conds: array of WHERE conditionals for query
&$tables: array of tables to be queried
$pageid: database ID of the page that's been moved
$redirid: database ID of the created redirect
+'UndeleteForm::showHistory': called in UndeleteForm::showHistory, after a
+PageArchive object has been created but before any further processing is done.
+&$archive: PageArchive object
+$title: Title object of the page that we're viewing
+
+'UndeleteForm::showRevision': called in UndeleteForm::showRevision, after a
+PageArchive object has been created but before any further processing is done.
+&$archive: PageArchive object
+$title: Title object of the page that we're viewing
+
+'UndeleteForm::undelete': called un UndeleteForm::undelete, after checking that
+the site is not in read-only mode, that the Title object is not null and after
+a PageArchive object has been constructed but before performing any further
+processing.
+&$archive: PageArchive object
+$title: Title object of the page that we're about to undelete
+
'UndeleteShowRevision': called when showing a revision in Special:Undelete
$title: title object related to the revision
$rev: revision (object) that will be viewed
'UserLoginForm': change to manipulate the login form
$template: SimpleTemplate instance for the form
-'UserLoginMailPassword': Block users from emailing passwords
-$name: the username to email the password of.
-&$error: out-param - the error message to return.
-
'UserLogout': before a user logs out
$user: the user object that is about to be logged out
$row: The database row for the revision.
$text: The revision text.
+'XMPGetInfo': Called when obtaining the list of XMP tags to extract. Can be used to add
+ additional tags to extract.
+&$items: Array containing information on which items to extract. See XMPInfo for details on the format.
+
+'XMPGetResults': Called just before returning the results array of parsing xmp data. Can be
+ used to post-process the results.
+&$data: Array of metadata sections (such as $data['xmp-general']) each section is an array of
+ metadata tags returned (each tag is either a value, or an array of values).
+
More hooks might be available but undocumented, you can execute
./maintenance/findhooks.php to find hidden one.