3 This document describes how event hooks work in MediaWiki; how to add hooks for
4 an event; and how to run hooks for an event.
9 Something that happens with the wiki. For example: a user logs in. A wiki
10 page is saved. A wiki page is deleted. Often there are two events
11 associated with a single action: one before the code is run to make the
12 event happen, and one after. Each event has a name, preferably in
13 CamelCase. For example, 'UserLogin', 'ArticleSave', 'ArticleSaveComplete',
17 A clump of code and data that should be run when an event happens. This can
18 be either a function and a chunk of data, or an object and a method.
21 The function part of a hook.
25 Hooks allow us to decouple optionally-run code from code that is run for
26 everyone. It allows MediaWiki hackers, third-party developers and local
27 administrators to define code that will be run at certain points in the mainline
28 code, and to modify the data run by that mainline code. Hooks can keep mainline
29 code simple, and make it easier to write extensions. Hooks are a principled
30 alternative to local patches.
32 Consider, for example, two options in MediaWiki. One reverses the order of a
33 title before displaying the article; the other converts the title to all
34 uppercase letters. Currently, in MediaWiki code, we would handle this as follows
35 (note: not real code, here):
37 function showAnArticle($article) {
38 global $wgReverseTitle, $wgCapitalizeTitle;
40 if ($wgReverseTitle) {
41 wfReverseTitle($article);
44 if ($wgCapitalizeTitle) {
45 wfCapitalizeTitle($article);
48 # code to actually show the article goes here
51 An extension writer, or a local admin, will often add custom code to the
52 function -- with or without a global variable. For example, someone wanting
53 email notification when an article is shown may add:
55 function showAnArticle($article) {
56 global $wgReverseTitle, $wgCapitalizeTitle, $wgNotifyArticle;
58 if ($wgReverseTitle) {
59 wfReverseTitle($article);
62 if ($wgCapitalizeTitle) {
63 wfCapitalizeTitle($article);
66 # code to actually show the article goes here
68 if ($wgNotifyArticle) {
69 wfNotifyArticleShow($article));
73 Using a hook-running strategy, we can avoid having all this option-specific
74 stuff in our mainline code. Using hooks, the function becomes:
76 function showAnArticle($article) {
78 if (wfRunHooks('ArticleShow', array(&$article))) {
80 # code to actually show the article goes here
82 wfRunHooks('ArticleShowComplete', array(&$article));
86 We've cleaned up the code here by removing clumps of weird, infrequently used
87 code and moving them off somewhere else. It's much easier for someone working
88 with this code to see what's _really_ going on, and make changes or fix bugs.
90 In addition, we can take all the code that deals with the little-used
91 title-reversing options (say) and put it in one place. Instead of having little
92 title-reversing if-blocks spread all over the codebase in showAnArticle,
93 deleteAnArticle, exportArticle, etc., we can concentrate it all in an extension
96 function reverseArticleTitle($article) {
100 function reverseForExport($article) {
104 The setup function for the extension just has to add its hook functions to the
107 setupTitleReversingExtension() {
110 $wgHooks['ArticleShow'][] = 'reverseArticleTitle';
111 $wgHooks['ArticleDelete'][] = 'reverseArticleTitle';
112 $wgHooks['ArticleExport'][] = 'reverseForExport';
115 Having all this code related to the title-reversion option in one place means
116 that it's easier to read and understand; you don't have to do a grep-find to see
117 where the $wgReverseTitle variable is used, say.
119 If the code is well enough isolated, it can even be excluded when not used --
120 making for some slight savings in memory and load-up performance at runtime.
121 Admins who want to have all the reversed titles can add:
123 require_once 'extensions/ReverseTitle.php';
125 ...to their LocalSettings.php file; those of us who don't want or need it can
128 The extensions don't even have to be shipped with MediaWiki; they could be
129 provided by a third-party developer or written by the admin him/herself.
133 A hook is a chunk of code run at some particular event. It consists of:
135 * a function with some optional accompanying data, or
136 * an object with a method and some optional accompanying data.
138 Hooks are registered by adding them to the global $wgHooks array for a given
139 event. All the following are valid ways to define hooks:
141 $wgHooks['EventName'][] = 'someFunction'; # function, no data
142 $wgHooks['EventName'][] = array('someFunction', $someData);
143 $wgHooks['EventName'][] = array('someFunction'); # weird, but OK
145 $wgHooks['EventName'][] = $object; # object only
146 $wgHooks['EventName'][] = array($object, 'someMethod');
147 $wgHooks['EventName'][] = array($object, 'someMethod', $someData);
148 $wgHooks['EventName'][] = array($object); # weird but OK
150 When an event occurs, the function (or object method) will be called with the
151 optional data provided as well as event-specific parameters. The above examples
152 would result in the following code being executed when 'EventName' happened:
155 someFunction($param1, $param2)
157 someFunction($someData, $param1, $param2)
160 $object->onEventName($param1, $param2)
162 $object->someMethod($param1, $param2)
163 # object with method and data
164 $object->someMethod($someData, $param1, $param2)
166 Note that when an object is the hook, and there's no specified method, the
167 default method called is 'onEventName'. For different events this would be
168 different: 'onArticleSave', 'onUserLogin', etc.
170 The extra data is useful if we want to use the same function or object for
171 different purposes. For example:
173 $wgHooks['ArticleSaveComplete'][] = array('ircNotify', 'TimStarling');
174 $wgHooks['ArticleSaveComplete'][] = array('ircNotify', 'brion');
176 This code would result in ircNotify being run twice when an article is saved:
177 once for 'TimStarling', and once for 'brion'.
179 Hooks can return three possible values:
181 * true: the hook has operated successfully
182 * "some string": an error occurred; processing should stop and the error
183 should be shown to the user
184 * false: the hook has successfully done the work necessary and the calling
187 The last result would be for cases where the hook function replaces the main
188 functionality. For example, if you wanted to authenticate users to a custom
189 system (LDAP, another PHP program, whatever), you could do:
191 $wgHooks['UserLogin'][] = array('ldapLogin', $ldapServer);
193 function ldapLogin($username, $password) {
198 Returning false makes less sense for events where the action is complete, and
199 will normally be ignored.
201 Note that none of the examples made use of create_function() as a way to
202 attach a function to a hook. This is known to cause problems (notably with
203 Special:Version), and should be avoided when at all possible.
207 A calling function or method uses the wfRunHooks() function to run the hooks
208 related to a particular event, like so:
214 if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser))) {
215 # protect the article
216 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser));
221 wfRunHooks() returns true if the calling function should continue processing
222 (the hooks ran OK, or there are no hooks to run), or false if it shouldn't (an
223 error occurred, or one of the hooks handled the action already). Checking the
224 return value matters more for "before" hooks than for "complete" hooks.
226 Note that hook parameters are passed in an array; this is a necessary
227 inconvenience to make it possible to pass reference values (that can be changed)
228 into the hook code. Also note that earlier versions of wfRunHooks took a
229 variable number of arguments; the array() calling protocol came about after
232 ==Events and parameters==
234 This is a list of known events and parameters; please add to it if you're going
235 to add events to the MediaWiki code.
237 'AbortAutoAccount': Return false to cancel automated local account creation,
238 where normally authentication against an external auth plugin would be creating
240 $user: the User object about to be created (read-only, incomplete)
241 &$abortMsg: out parameter: name of error message to be displayed to user
243 'AbortAutoblock': Return false to cancel an autoblock.
244 $autoblockip: The IP going to be autoblocked.
245 $block: The block from which the autoblock is coming.
247 'AbortDiffCache': Can be used to cancel the caching of a diff.
248 &$diffEngine: DifferenceEngine object
250 'AbortEmailNotification': Can be used to cancel email notifications for an edit.
251 $editor: The User who made the change.
252 $title: The Title of the page that was edited.
253 $rc: The current RecentChange object.
255 'AbortLogin': Return false to cancel account login.
256 $user: the User object being authenticated against
257 $password: the password being submitted, not yet checked for validity
258 &$retval: a LoginForm class constant to return from authenticateUserData();
259 default is LoginForm::ABORTED. Note that the client may be using
260 a machine API rather than the HTML user interface.
261 &$msg: the message identifier for abort reason (new in 1.18, not available before 1.18)
263 'AbortMove': Allows to abort moving an article (title).
266 $user: user who is doing the move
268 $reason: the reason for the move (added in 1.13)
270 'AbortNewAccount': Return false to cancel explicit account creation.
271 $user: the User object about to be created (read-only, incomplete)
272 &$msg: out parameter: HTML to display on abort
273 &$status: out parameter: Status object to return, replaces the older $msg param (added in 1.23)
274 Create the object with Status::newFatal() to ensure proper API error messages
275 are returned when creating account through API clients.
277 'AbortTalkPageEmailNotification': Return false to cancel talk page email notification
278 $targetUser: the user whom to send talk page email notification
279 $title: the page title
281 'SendWatchlistEmailNotification': Return true to send watchlist email notification
282 $targetUser: the user whom to send watchlist email notification
283 $title: the page title
284 $enotif: EmailNotification object
286 'AbortChangePassword': Return false to cancel password change.
287 $user: the User object to which the password change is occuring
288 $mOldpass: the old password provided by the user
289 $newpass: the new password provided by the user
290 &$abortMsg: the message identifier for abort reason
292 'ActionBeforeFormDisplay': Before executing the HTMLForm object.
293 $name: name of the action
294 &$form: HTMLForm object
295 $article: Article object
297 'ActionModifyFormFields': Before creating an HTMLForm object for a page action;
298 Allows to change the fields on the form that will be generated.
299 $name: name of the action
300 &$fields: HTMLForm descriptor array
301 $article: Article object
303 'AddNewAccount': After a user account is created.
304 $user: the User object that was created. (Parameter added in 1.7)
305 $byEmail: true when account was created "by email" (added in 1.12)
307 'AddNewAccountApiForm': Allow modifying internal login form when creating an account via API.
308 $apiModule: the ApiCreateAccount module calling
309 $loginForm: the LoginForm used
311 'AddNewAccountApiResult': Modify API output when creating a new account via API.
312 $apiModule: the ApiCreateAccount module calling
313 $loginForm: the LoginForm used
314 &$result: associative array for API result data
316 'AfterFinalPageOutput': Nearly at the end of OutputPage::output() but
317 before OutputPage::sendCacheControl() and final ob_end_flush() which
318 will send the buffered output to the client. This allows for last-minute
319 modification of the output within the buffer by using ob_get_clean().
320 $output: The OutputPage object where output() was called
322 'AfterImportPage': When a page import is completed.
323 $title: Title under which the revisions were imported
324 $origTitle: Title provided by the XML file
325 $revCount: Number of revisions in the XML file
326 $sRevCount: Number of successfully imported revisions
327 $pageInfo: associative array of page information
329 'AfterParserFetchFileAndTitle': After an image gallery is formed by Parser,
330 just before adding its HTML to parser output.
331 $parser: Parser object that called the hook
332 $ig: Gallery, an object of one of the gallery classes (inheriting from
334 $html: HTML generated by the gallery
336 'AlternateEdit': Before checking if a user can edit a page and before showing
337 the edit form ( EditPage::edit() ). This is triggered on &action=edit.
338 $editPage: the EditPage object
340 'AlternateEditPreview': Before generating the preview of the page when editing
341 ( EditPage::getPreviewText() ).
342 $editPage: the EditPage object
343 &$content: the Content object for the text field from the edit page
344 &$previewHTML: Text to be placed into the page for the preview
345 &$parserOutput: the ParserOutput object for the preview
346 return false and set $previewHTML and $parserOutput to output custom page
349 'AlternateUserMailer': Called before mail is sent so that mail could be logged
350 (or something else) instead of using PEAR or PHP's mail(). Return false to skip
351 the regular method of sending mail. Return a string to return a php-mail-error
352 message containing the error. Returning true will continue with sending email
354 $headers: Associative array of headers for the email
355 $to: MailAddress object or array
357 $subject: Subject of the email
358 $body: Body of the message
360 'APIAfterExecute': After calling the execute() method of an API module. Use
361 this to extend core API modules.
362 &$module: Module object
364 'ApiBeforeMain': Before calling ApiMain's execute() method in api.php.
365 &$main: ApiMain object
367 'ApiCheckCanExecute': Called during ApiMain::checkCanExecute. Use to further
368 authenticate and authorize API clients before executing the module. Return
369 false and set a message to cancel the request.
370 $module: Module object
372 &$message: API usage message to die with, as a message key or array
373 as accepted by ApiBase::dieUsageMsg.
375 'APIEditBeforeSave': Before saving a page with api.php?action=edit, after
376 processing request parameters. Return false to let the request fail, returning
377 an error message or an <edit result="Failure"> tag if $resultArr was filled.
378 $editPage : the EditPage object
379 $text : the new text of the article (has yet to be saved)
380 &$resultArr : data in this array will be added to the API result
382 'APIGetAllowedParams': Use this hook to modify a module's parameters.
383 &$module: ApiBase Module object
384 &$params: Array of parameters
385 $flags: int zero or OR-ed flags like ApiBase::GET_VALUES_FOR_HELP
387 'APIGetDescription': DEPRECATED! Use APIGetDescriptionMessages instead.
388 Use this hook to modify a module's description.
389 &$module: ApiBase Module object
390 &$desc: String description, or array of description strings
392 'APIGetDescriptionMessages': Use this hook to modify a module's help message.
393 $module: ApiBase Module object
394 &$msg: Array of Message objects
396 'APIGetParamDescription': DEPRECATED! Use APIGetParamDescriptionMessages instead.
397 Use this hook to modify a module's parameter descriptions.
398 &$module: ApiBase Module object
399 &$desc: Array of parameter descriptions
401 'APIGetParamDescriptionMessages': Use this hook to modify a module's parameter descriptions.
402 $module: ApiBase Module object
403 &$msg: Array of arrays of Message objects
405 'APIHelpModifyOutput': Use this hook to modify an API module's help output.
406 $module: ApiBase Module object
407 &$help: Array of HTML strings to be joined for the output.
408 $options: Array Options passed to ApiHelp::getHelp
410 'APIQueryAfterExecute': After calling the execute() method of an
411 action=query submodule. Use this to extend core API modules.
412 &$module: Module object
414 'APIQueryGeneratorAfterExecute': After calling the executeGenerator() method of
415 an action=query submodule. Use this to extend core API modules.
416 &$module: Module object
417 &$resultPageSet: ApiPageSet object
419 'APIQueryInfoTokens': DEPRECATED! Use ApiQueryTokensRegisterTypes instead.
420 Use this hook to add custom tokens to prop=info. Every token has an action,
421 which will be used in the intoken parameter and in the output
422 (actiontoken="..."), and a callback function which should return the token, or
423 false if the user isn't allowed to obtain it. The prototype of the callback
424 function is func($pageid, $title), where $pageid is the page ID of the page the
425 token is requested for and $title is the associated Title object. In the hook,
426 just add your callback to the $tokenFunctions array and return true (returning
427 false makes no sense).
428 $tokenFunctions: array(action => callback)
430 'APIQueryRevisionsTokens': DEPRECATED! Use ApiQueryTokensRegisterTypes instead.
431 Use this hook to add custom tokens to prop=revisions. Every token has an
432 action, which will be used in the rvtoken parameter and in the output
433 (actiontoken="..."), and a callback function which should return the token, or
434 false if the user isn't allowed to obtain it. The prototype of the callback
435 function is func($pageid, $title, $rev), where $pageid is the page ID of the
436 page associated to the revision the token is requested for, $title the
437 associated Title object and $rev the associated Revision object. In the hook,
438 just add your callback to the $tokenFunctions array and return true (returning
439 false makes no sense).
440 $tokenFunctions: array(action => callback)
442 'APIQueryRecentChangesTokens': DEPRECATED! Use ApiQueryTokensRegisterTypes instead.
443 Use this hook to add custom tokens to list=recentchanges. Every token has an
444 action, which will be used in the rctoken parameter and in the output
445 (actiontoken="..."), and a callback function which should return the token, or
446 false if the user isn't allowed to obtain it. The prototype of the callback
447 function is func($pageid, $title, $rc), where $pageid is the page ID of the
448 page associated to the revision the token is requested for, $title the
449 associated Title object and $rc the associated RecentChange object. In the
450 hook, just add your callback to the $tokenFunctions array and return true
451 (returning false makes no sense).
452 $tokenFunctions: array(action => callback)
454 'APIQuerySiteInfoGeneralInfo': Use this hook to add extra information to the
455 sites general information.
456 $module: the current ApiQuerySiteInfo module
457 &$results: array of results, add things here
459 'APIQuerySiteInfoStatisticsInfo': Use this hook to add extra information to the
460 sites statistics information.
461 &$results: array of results, add things here
463 'ApiQueryTokensRegisterTypes': Use this hook to add additional token types to
464 action=query&meta=tokens. Note that most modules will probably be able to use
465 the 'csrf' token instead of creating their own token types.
466 &$salts: array( type => salt to pass to User::getEditToken() )
468 'APIQueryUsersTokens': DEPRECATED! Use ApiQueryTokensRegisterTypes instead.
469 Use this hook to add custom token to list=users. Every token has an action,
470 which will be used in the ustoken parameter and in the output
471 (actiontoken="..."), and a callback function which should return the token, or
472 false if the user isn't allowed to obtain it. The prototype of the callback
473 function is func($user) where $user is the User object. In the hook, just add
474 your callback to the $tokenFunctions array and return true (returning false
476 $tokenFunctions: array(action => callback)
478 'ApiMain::onException': Called by ApiMain::executeActionWithErrorHandling() when
479 an exception is thrown during API action execution.
480 $apiMain: Calling ApiMain instance.
481 $e: Exception object.
483 'ApiRsdServiceApis': Add or remove APIs from the RSD services list. Each service
484 should have its own entry in the $apis array and have a unique name, passed as
485 key for the array that represents the service data. In this data array, the
486 key-value-pair identified by the apiLink key is required.
487 &$apis: array of services
489 'ApiTokensGetTokenTypes': DEPRECATED! Use ApiQueryTokensRegisterTypes instead.
490 Use this hook to extend action=tokens with new token types.
491 &$tokenTypes: supported token types in format 'type' => callback function
492 used to retrieve this type of tokens.
494 'Article::MissingArticleConditions': Before fetching deletion & move log entries
495 to display a message of a non-existing page being deleted/moved, give extensions
496 a chance to hide their (unrelated) log entries.
497 &$conds: Array of query conditions (all of which have to be met; conditions will
498 AND in the final query)
499 $logTypes: Array of log types being queried
501 'ArticleAfterFetchContent': After fetching content of an article from the
502 database. DEPRECATED, use ArticleAfterFetchContentObject instead.
503 $article: the article (object) being loaded from the database
504 &$content: the content (string) of the article
506 'ArticleAfterFetchContentObject': After fetching content of an article from the
508 $article: the article (object) being loaded from the database
509 &$content: the content of the article, as a Content object
511 'ArticleConfirmDelete': Before writing the confirmation form for article
513 $article: the article (object) being deleted
514 $output: the OutputPage object
515 &$reason: the reason (string) the article is being deleted
517 'ArticleContentOnDiff': Before showing the article content below a diff. Use
518 this to change the content in this area or how it is loaded.
519 $diffEngine: the DifferenceEngine
520 $output: the OutputPage object
522 'ArticleDelete': Before an article is deleted.
523 $wikiPage: the WikiPage (object) being deleted
524 $user: the user (object) deleting the article
525 $reason: the reason (string) the article is being deleted
526 $error: if the deletion was prohibited, the (raw HTML) error message to display
528 $status: Status object, modify this to throw an error. Overridden by $error
531 'ArticleDeleteComplete': After an article is deleted.
532 $wikiPage: the WikiPage that was deleted
533 $user: the user that deleted the article
534 $reason: the reason the article was deleted
535 $id: id of the article that was deleted
536 $content: the Content of the deleted page
537 $logEntry: the ManualLogEntry used to record the deletion
539 'ArticleEditUpdateNewTalk': Before updating user_newtalk when a user talk page
541 &$wikiPage: WikiPage (object) of the user talk page
542 $recipient: User (object) who's talk page was edited
544 'ArticleEditUpdates': When edit updates (mainly link tracking) are made when an
545 article has been changed.
546 $wikiPage: the WikiPage (object)
547 $editInfo: data holder that includes the parser output ($editInfo->output) for
548 that page after the change
549 $changed: bool for if the page was changed
551 'ArticleEditUpdatesDeleteFromRecentchanges': Before deleting old entries from
552 recentchanges table, return false to not delete old entries.
553 $wikiPage: WikiPage (object) being modified
555 'ArticleFromTitle': when creating an article object from a title object using
556 Wiki::articleFromTitle().
557 $title: Title (object) used to create the article object
558 $article: Article (object) that will be returned
559 $context: IContextSource (object)
561 'ArticleInsertComplete': After a new article is created. DEPRECATED, use
562 PageContentInsertComplete.
563 $wikiPage: WikiPage created
564 $user: User creating the article
566 $summary: Edit summary/comment
567 $isMinor: Whether or not the edit was marked as minor
568 $isWatch: (No longer used)
569 $section: (No longer used)
570 $flags: Flags passed to WikiPage::doEditContent()
571 $revision: New Revision of the article
573 'ArticleMergeComplete': After merging to article using Special:Mergehistory.
574 $targetTitle: target title (object)
575 $destTitle: destination title (object)
577 'ArticlePageDataAfter': After loading data of an article from the database.
578 $wikiPage: WikiPage (object) whose data were loaded
579 $row: row (object) returned from the database server
581 'ArticlePageDataBefore': Before loading data of an article from the database.
582 $wikiPage: WikiPage (object) that data will be loaded
583 $fields: fields (array) to load from the database
585 'ArticlePrepareTextForEdit': Called when preparing text to be saved.
586 $wikiPage: the WikiPage being saved
587 $popts: parser options to be used for pre-save transformation
589 'ArticleProtect': Before an article is protected.
590 $wikiPage: the WikiPage being protected
591 $user: the user doing the protection
592 $protect: boolean whether this is a protect or an unprotect
593 $reason: Reason for protect
594 $moveonly: boolean whether this is for move only or not
596 'ArticleProtectComplete': After an article is protected.
597 $wikiPage: the WikiPage that was protected
598 $user: the user who did the protection
599 $protect: boolean whether it was a protect or an unprotect
600 $reason: Reason for protect
601 $moveonly: boolean whether it was for move only or not
603 'ArticlePurge': Before executing "&action=purge".
604 $wikiPage: WikiPage (object) to purge
606 'ArticleRevisionVisibilitySet': Called when changing visibility of one or more
607 revisions of an article.
608 &$title: Title object of the article
610 'ArticleRevisionUndeleted': After an article revision is restored.
611 $title: the article title
612 $revision: the revision
613 $oldPageID: the page ID of the revision when archived (may be null)
615 'ArticleRollbackComplete': After an article rollback is completed.
616 $wikiPage: the WikiPage that was edited
617 $user: the user who did the rollback
618 $revision: the revision the page was reverted back to
619 $current: the reverted revision
621 'ArticleSave': Before an article is saved. DEPRECATED, use PageContentSave
623 $wikiPage: the WikiPage (object) being saved
624 $user: the user (object) saving the article
625 $text: the new article text
626 $summary: the article summary (comment)
631 'ArticleSaveComplete': After an article has been updated. DEPRECATED, use
632 PageContentSaveComplete instead.
633 $wikiPage: WikiPage modified
634 $user: User performing the modification
636 $summary: Edit summary/comment
637 $isMinor: Whether or not the edit was marked as minor
638 $isWatch: (No longer used)
639 $section: (No longer used)
640 $flags: Flags passed to WikiPage::doEditContent()
641 $revision: New Revision of the article
642 $status: Status object about to be returned by doEditContent()
643 $baseRevId: the rev ID (or false) this edit was based on
645 'ArticleUndelete': When one or more revisions of an article are restored.
646 $title: Title corresponding to the article restored
647 $create: Whether or not the restoration caused the page to be created (i.e. it
648 didn't exist before).
649 $comment: The comment associated with the undeletion.
650 $oldPageId: ID of page previously deleted (from archive table)
652 'ArticleUndeleteLogEntry': When a log entry is generated but not yet saved.
653 $pageArchive: the PageArchive object
654 &$logEntry: ManualLogEntry object
655 $user: User who is performing the log action
657 'ArticleUpdateBeforeRedirect': After a page is updated (usually on save), before
658 the user is redirected back to the page.
659 &$article: the article
660 &$sectionanchor: The section anchor link (e.g. "#overview" )
661 &$extraq: Extra query parameters which can be added via hooked functions
663 'ArticleViewFooter': After showing the footer section of an ordinary page view
664 $article: Article object
665 $patrolFooterShown: boolean whether patrol footer is shown
667 'ArticleViewHeader': Before the parser cache is about to be tried for article
669 &$article: the article
670 &$pcache: whether to try the parser cache or not
671 &$outputDone: whether the output for this page finished or not. Set to a ParserOutput
672 object to both indicate that the output is done and what parser output was used.
674 'ArticleViewRedirect': Before setting "Redirected from ..." subtitle when a
675 redirect was followed.
676 $article: target article (object)
678 'ArticleViewCustom': Allows to output the text of the article in a different
679 format than wikitext. DEPRECATED, use ArticleContentViewCustom instead. Note
680 that it is preferable to implement proper handing for a custom data type using
681 the ContentHandler facility.
682 $text: text of the page
683 $title: title of the page
684 $output: reference to $wgOut
686 'ArticleContentViewCustom': Allows to output the text of the article in a
687 different format than wikitext. Note that it is preferable to implement proper
688 handing for a custom data type using the ContentHandler facility.
689 $content: content of the page, as a Content object
690 $title: title of the page
691 $output: reference to $wgOut
693 'AuthPluginAutoCreate': Called when creating a local account for an user logged
694 in from an external authentication method.
695 $user: User object created locally
697 'AuthPluginSetup': Update or replace authentication plugin object ($wgAuth).
698 Gives a chance for an extension to set it programmatically to a variable class.
699 &$auth: the $wgAuth object, probably a stub
701 'AutopromoteCondition': Check autopromote condition for user.
702 $type: condition type
705 $result: result of checking autopromote condition
707 'BacklinkCacheGetPrefix': Allows to set prefix for a specific link table.
711 'BacklinkCacheGetConditions': Allows to set conditions for query when links to
712 certain title are fetched.
714 $title: title of the page to which backlinks are sought
715 &$conds: query conditions
717 'BadImage': When checking against the bad image list. Change $bad and return
718 false to override. If an image is "bad", it is not rendered inline in wiki
719 pages or galleries in category pages.
720 $name: Image name being checked
721 &$bad: Whether or not the image is "bad"
723 'BaseTemplateAfterPortlet': After output of portlets, allow injecting
724 custom HTML after the section. Any uses of the hook need to handle escaping.
725 $template BaseTemplate
726 $portlet: string portlet name
729 'BeforeDisplayNoArticleText': Before displaying message key "noarticletext" or
730 "noarticletext-nopermission" at Article::showMissingArticle().
731 $article: article object
733 'BeforeInitialize': Before anything is initialized in
734 MediaWiki::performRequest().
735 &$title: Title being used for request
737 &$output: OutputPage object
739 $request: WebRequest object
740 $mediaWiki: Mediawiki object
742 'BeforePageDisplay': Prior to outputting a page.
743 &$out: OutputPage object
746 'BeforeHttpsRedirect': Prior to forcing HTTP->HTTPS redirect. Gives a chance to
747 override how the redirect is output by modifying, or by returning false, and
748 letting standard HTTP rendering take place.
749 ATTENTION: This hook is likely to be removed soon due to overall design of the system.
750 $context: IContextSource object
751 &$redirect: string URL, modifiable
753 'BeforePageRedirect': Prior to sending an HTTP redirect. Gives a chance to
754 override how the redirect is output by modifying, or by returning false and
755 taking over the output.
756 $out: OutputPage object
757 &$redirect: URL, modifiable
758 &$code: HTTP code (eg '301' or '302'), modifiable
760 'BeforeParserFetchFileAndTitle': Before an image is rendered by Parser.
761 $parser: Parser object
763 &$options: array of options to RepoGroup::findFile
764 &$descQuery: query string to add to thumbnail URL
766 FIXME: Where does the below sentence fit in?
767 If 'broken' is a key in $options then the file will appear as a broken thumbnail.
769 'BeforeParserFetchTemplateAndtitle': Before a template is fetched by Parser.
770 $parser: Parser object
771 $title: title of the template
772 &$skip: skip this template and link it?
773 &$id: the id of the revision being parsed
775 'BeforeParserrenderImageGallery': Before an image gallery is rendered by Parser.
776 &$parser: Parser object
777 &$ig: ImageGallery object
779 'BeforeWelcomeCreation': Before the welcomecreation message is displayed to a
781 &$welcome_creation_msg: MediaWiki message name to display on the welcome screen
782 to a newly created user account.
783 &$injected_html: Any HTML to inject after the "logged in" message of a newly
786 'BitmapHandlerTransform': before a file is transformed, gives extension the
787 possibility to transform it themselves
788 $handler: BitmapHandler
790 &$scalerParams: Array with scaler parameters
791 &$mto: null, set to a MediaTransformOutput
793 'BitmapHandlerCheckImageArea': By BitmapHandler::normaliseParams, after all
794 normalizations have been performed, except for the $wgMaxImageArea check.
796 &$params: Array of parameters
797 &$checkImageAreaHookResult: null, set to true or false to override the
798 $wgMaxImageArea check result.
800 'PerformRetroactiveAutoblock': Called before a retroactive autoblock is applied
802 $block: Block object (which is set to be autoblocking)
803 &$blockIds: Array of block IDs of the autoblock
805 'BlockIp': Before an IP address or user is blocked.
806 $block: the Block object about to be saved
807 $user: the user _doing_ the block (not the one being blocked)
808 &$reason: if the hook is aborted, the error message to be returned in an array
810 'BlockIpComplete': After an IP address or user is blocked.
811 $block: the Block object that was saved
812 $user: the user who did the block (not the one being blocked)
814 'BookInformation': Before information output on Special:Booksources.
815 $isbn: ISBN to show information for
816 $output: OutputPage object in use
818 'CanIPUseHTTPS': Determine whether the client at a given source IP is likely
819 to be able to access the wiki via HTTPS.
820 $ip: The IP address in human-readable form
821 &$canDo: This reference should be set to false if the client may not be able
824 'CanonicalNamespaces': For extensions adding their own namespaces or altering
826 Note that if you need to specify namespace protection or content model for
827 a namespace that is added in a CanonicalNamespaces hook handler, you
828 should do so by altering $wgNamespaceProtection and
829 $wgNamespaceContentModels outside the handler, in top-level scope. The
830 point at which the CanonicalNamespaces hook fires is too late for altering
831 these variables. This applies even if the namespace addition is
832 conditional; it is permissible to declare a content model and protection
833 for a namespace and then decline to actually register it.
834 &$namespaces: Array of namespace numbers with corresponding canonical names
836 'CategoryAfterPageAdded': After a page is added to a category.
837 $category: Category that page was added to
838 $wikiPage: WikiPage that was added
840 'CategoryAfterPageRemoved': After a page is removed from a category.
841 $category: Category that page was removed from
842 $wikiPage: WikiPage that was removed
844 'CategoryPageView': Before viewing a categorypage in CategoryPage::view.
845 $catpage: CategoryPage instance
847 'ChangePasswordForm': For extensions that need to add a field to the
848 ChangePassword form via the Preferences form.
849 &$extraFields: An array of arrays that hold fields like would be passed to the
852 'ChangesListInsertArticleLink': Override or augment link to article in RC list.
853 &$changesList: ChangesList instance.
854 &$articlelink: HTML of link to article (already filled-in).
855 &$s: HTML of row that is being constructed.
856 &$rc: RecentChange instance.
857 $unpatrolled: Whether or not we are showing unpatrolled changes.
858 $watched: Whether or not the change is watched by the user.
860 'ChangesListInitRows': Batch process change list rows prior to rendering.
861 $changesList: ChangesList instance
862 $rows: The data that will be rendered. May be a ResultWrapper instance or
865 'ChangesListSpecialPageFilters': Called after building form options on pages inheriting from ChangesListSpecialPage (in core: RecentChanges, RecentChangesLinked and Watchlist).
866 $special: ChangesListSpecialPage instance
867 &$filters: associative array of filter definitions. The keys are the HTML
868 name/URL parameters. Each key maps to an associative array with a 'msg'
869 (message key) and a 'default' value.
871 'ChangesListSpecialPageQuery': Called when building SQL query on pages inheriting from ChangesListSpecialPage (in core: RecentChanges, RecentChangesLinked and Watchlist).
872 $name: name of the special page, e.g. 'Watchlist'
873 &$tables: array of tables to be queried
874 &$fields: array of columns to select
875 &$conds: array of WHERE conditionals for query
876 &$query_options: array of options for the database request
877 &$join_conds: join conditions for the tables
878 $opts: FormOptions for this request
880 'LoginUserMigrated': Called during login to allow extensions the opportunity to
881 inform a user that their username doesn't exist for a specific reason, instead
882 of letting the login form give the generic error message that the account does
883 not exist. For example, when the account has been renamed or deleted.
884 $user: the User object being authenticated against.
885 &$msg: the message identifier for abort reason, or an array to pass a message
888 'Collation::factory': Called if $wgCategoryCollation is an unknown collation.
889 $collationName: Name of the collation in question
890 &$collationObject: Null. Replace with a subclass of the Collation class that
891 implements the collation given in $collationName.
893 'ConfirmEmailComplete': Called after a user's email has been confirmed
895 $user: user (object) whose email is being confirmed
897 'ContentHandlerDefaultModelFor': Called when the default content model is determined
898 for a given title. May be used to assign a different model for that title.
899 $title: the Title in question
900 &$model: the model name. Use with CONTENT_MODEL_XXX constants.
902 'ContentHandlerForModelID': Called when a ContentHandler is requested for a given
903 content model name, but no entry for that model exists in $wgContentHandlers.
904 $modeName: the requested content model name
905 &$handler: set this to a ContentHandler object, if desired.
907 'ContentModelCanBeUsedOn': Called to determine whether that content model can
908 be used on a given page. This is especially useful to prevent some content models
909 to be used in some special location.
910 $contentModel: ID of the content model in question
911 $title: the Title in question.
912 &$ok: Output parameter, whether it is OK to use $contentModel on $title.
913 Handler functions that modify $ok should generally return false to prevent further
914 hooks from further modifying $ok.
916 'ContentGetParserOutput': Customize parser output for a given content object,
917 called by AbstractContent::getParserOutput. May be used to override the normal
918 model-specific rendering of page content.
919 $content: The Content to render
920 $title: Title of the page, as context
921 $revId: The revision ID, as context
922 $options: ParserOptions for rendering. To avoid confusing the parser cache,
923 the output can only depend on parameters provided to this hook function, not on global state.
924 $generateHtml: boolean, indicating whether full HTML should be generated. If false,
925 generation of HTML may be skipped, but other information should still be present in the
927 &$output: ParserOutput, to manipulate or replace
929 'ConvertContent': Called by AbstractContent::convert when a conversion to another
930 content model is requested.
931 $content: The Content object to be converted.
932 $toModel: The ID of the content model to convert to.
933 $lossy: boolean indicating whether lossy conversion is allowed.
934 &$result: Output parameter, in case the handler function wants to provide a
935 converted Content object. Note that $result->getContentModel() must return $toModel.
936 Handler functions that modify $result should generally return false to further
937 attempts at conversion.
939 'ContribsPager::getQueryInfo': Before the contributions query is about to run
940 &$pager: Pager object for contributions
941 &$queryInfo: The query for the contribs Pager
943 'ContribsPager::reallyDoQuery': Called before really executing the query for My Contributions
944 &$data: an array of results of all contribs queries
945 $pager: The ContribsPager object hooked into
946 $offset: Index offset, inclusive
947 $limit: Exact query limit
948 $descending: Query direction, false for ascending, true for descending
950 'ContributionsLineEnding': Called before a contributions HTML line is finished
951 $page: SpecialPage object for contributions
953 $row: the DB row for this line
954 &$classes: the classes to add to the surrounding <li>
956 'ContributionsToolLinks': Change tool links above Special:Contributions
958 $title: User page title
959 &$tools: Array of tool links
961 'CustomEditor': When invoking the page editor
962 $article: Article being edited
963 $user: User performing the edit
965 Return true to allow the normal editor to be used, or false
966 if implementing a custom editor, e.g. for a special namespace,
969 'DatabaseOraclePostInit': Called after initialising an Oracle database
970 &$db: the DatabaseOracle object
972 'NewDifferenceEngine': Called when a new DifferenceEngine object is made
973 $title: the diff page title (nullable)
974 &$oldId: the actual old Id to use in the diff
975 &$newId: the actual new Id to use in the diff (0 means current)
976 $old: the ?old= param value from the url
977 $new: the ?new= param value from the url
979 'DiffRevisionTools': Override or extend the revision tools available from the
980 diff view, i.e. undo, etc.
981 $newRev: Revision object of the "new" revision
982 &$links: Array of HTML links
983 $oldRev: Revision object of the "old" revision (may be null)
985 'DiffViewHeader': Called before diff display
986 $diff: DifferenceEngine object that's calling
987 $oldRev: Revision object of the "old" revision (may be null/invalid)
988 $newRev: Revision object of the "new" revision
990 'DisplayOldSubtitle': before creating subtitle when browsing old versions of
992 $article: article (object) being viewed
993 $oldid: oldid (int) being viewed
995 'DoEditSectionLink': Override the HTML generated for section edit links
996 $skin: Skin object rendering the UI
997 $title: Title object for the title being linked to (may not be the same as
998 the page title, if the section is included from a template)
999 $section: The designation of the section being pointed to, to be included in
1000 the link, like "§ion=$section"
1001 $tooltip: The default tooltip. Escape before using.
1002 By default, this is wrapped in the 'editsectionhint' message.
1003 &$result: The HTML to return, prefilled with the default plus whatever other
1004 changes earlier hooks have made
1005 $lang: The language code to use for the link in the wfMessage function
1007 'EditFilter': Perform checks on an edit
1008 $editor: EditPage instance (object). The edit form (see includes/EditPage.php)
1009 $text: Contents of the edit box
1010 $section: Section being edited
1011 &$error: Error message to return
1012 $summary: Edit summary for page
1014 'EditFilterMerged': Post-section-merge edit filter.
1015 DEPRECATED, use EditFilterMergedContent instead.
1016 $editor: EditPage instance (object)
1017 $text: content of the edit box
1018 &$error: error message to return
1019 $summary: Edit summary for page
1021 'EditFilterMergedContent': Post-section-merge edit filter.
1022 This may be triggered by the EditPage or any other facility that modifies page content.
1023 Use the $status object to indicate whether the edit should be allowed, and to provide
1024 a reason for disallowing it. Return false to abort the edit, and true to continue.
1025 Returning true if $status->isOK() returns false means "don't save but continue user
1026 interaction", e.g. show the edit form.
1027 $context: object implementing the IContextSource interface.
1028 $content: content of the edit box, as a Content object.
1029 $status: Status object to represent errors, etc.
1030 $summary: Edit summary for page
1031 $user: the User object representing the user whois performing the edit.
1032 $minoredit: whether the edit was marked as minor by the user.
1034 'EditFormPreloadText': Allows population of the edit form when creating
1036 &$text: Text to preload with
1037 &$title: Title object representing the page being created
1039 'EditFormInitialText': Allows modifying the edit form when editing existing
1041 $editPage: EditPage object
1043 'EditPage::attemptSave': Called before an article is
1044 saved, that is before WikiPage::doEditContent() is called
1045 $editpage_Obj: the current EditPage object
1047 'EditPage::importFormData': allow extensions to read additional data
1049 $editpage: EditPage instance
1050 $request: Webrequest
1051 return value is ignored (should always return true)
1053 'EditPage::showEditForm:fields': allows injection of form field into edit form
1054 $editor: the EditPage instance for reference
1055 $out: an OutputPage instance to write to
1056 return value is ignored (should always return true)
1058 'EditPage::showEditForm:initial': before showing the edit form
1059 $editor: EditPage instance (object)
1060 $out: an OutputPage instance to write to
1062 Return false to halt editing; you'll need to handle error messages, etc.
1063 yourself. Alternatively, modifying $error and returning true will cause the
1064 contents of $error to be echoed at the top of the edit form as wikitext.
1065 Return true without altering $error to allow the edit to proceed.
1067 'EditPage::showReadOnlyForm:initial': similar to EditPage::showEditForm:initial
1068 but for the read-only 'view source' variant of the edit form.
1069 $editor: EditPage instance (object)
1070 &$out: an OutputPage instance to write to
1071 return value is ignored (should always return true)
1073 'EditPage::showStandardInputs:options': allows injection of form fields into
1074 the editOptions area
1075 $editor: EditPage instance (object)
1076 $out: an OutputPage instance to write to
1077 &$tabindex: HTML tabindex of the last edit check/button
1078 return value is ignored (should always be true)
1080 'EditPageBeforeConflictDiff': allows modifying the EditPage object and output
1081 when there's an edit conflict. Return false to halt normal diff output; in
1082 this case you're responsible for computing and outputting the entire "conflict"
1083 part, i.e., the "difference between revisions" and "your text" headers and
1085 &$editor: EditPage instance
1086 &$out: OutputPage instance
1088 'EditPageBeforeEditButtons': Allows modifying the edit buttons below the
1089 textarea in the edit form.
1090 &$editpage: The current EditPage object
1091 &$buttons: Array of edit buttons "Save", "Preview", "Live", and "Diff"
1092 &$tabindex: HTML tabindex of the last edit check/button
1094 'EditPageBeforeEditChecks': Allows modifying the edit checks below the textarea
1096 &$editpage: The current EditPage object
1097 &$checks: Array of edit checks like "watch this page"/"minor edit"
1098 &$tabindex: HTML tabindex of the last edit check/button
1100 'EditPageBeforeEditToolbar': Allows modifying the edit toolbar above the
1101 textarea in the edit form.
1102 &$toolbar: The toolbar HTMl
1104 'EditPageCopyrightWarning': Allow for site and per-namespace customization of
1105 contribution/copyright notice.
1106 $title: title of page being edited
1107 &$msg: localization message name, overridable. Default is either
1108 'copyrightwarning' or 'copyrightwarning2'.
1110 'EditPageGetDiffText': DEPRECATED. Use EditPageGetDiffContent instead. Allow
1111 modifying the wikitext that will be used in "Show changes". Note that it is
1112 preferable to implement diff handling for different data types using the
1113 ContentHandler facility.
1114 $editPage: EditPage object
1115 &$newtext: wikitext that will be used as "your version"
1117 'EditPageGetDiffContent': Allow modifying the wikitext that will be used in
1118 "Show changes". Note that it is preferable to implement diff handling for
1119 different data types using the ContentHandler facility.
1120 $editPage: EditPage object
1121 &$newtext: wikitext that will be used as "your version"
1123 'EditPageGetPreviewText': DEPRECATED. Use EditPageGetPreviewContent instead.
1124 Allow modifying the wikitext that will be previewed. Note that it is preferable
1125 to implement previews for different data types using the ContentHandler
1127 $editPage: EditPage object
1128 &$toparse: wikitext that will be parsed
1130 'EditPageGetPreviewContent': Allow modifying the wikitext that will be
1131 previewed. Note that it is preferable to implement previews for different data
1132 types using the ContentHandler facility.
1133 $editPage: EditPage object
1134 &$content: Content object to be previewed (may be replaced by hook function)
1136 'EditPageNoSuchSection': When a section edit request is given for an non-existent section
1137 &$editpage: The current EditPage object
1138 &$res: the HTML of the error text
1140 'EditPageTosSummary': Give a chance for site and per-namespace customizations
1141 of terms of service summary link that might exist separately from the copyright
1143 $title: title of page being edited
1144 &$msg: localization message name, overridable. Default is 'editpage-tos-summary'
1146 'EmailConfirmed': When checking that the user's email address is "confirmed".
1147 $user: User being checked
1148 $confirmed: Whether or not the email address is confirmed
1149 This runs before the other checks, such as anonymity and the real check; return
1150 true to allow those checks to occur, and false if checking is done.
1152 'EmailUser': Before sending email from one user to another.
1153 $to: address of receiving user
1154 $from: address of sending user
1155 $subject: subject of the mail
1156 $text: text of the mail
1158 'EmailUserCC': Before sending the copy of the email to the author.
1159 $to: address of receiving user
1160 $from: address of sending user
1161 $subject: subject of the mail
1162 $text: text of the mail
1164 'EmailUserComplete': After sending email from one user to another.
1165 $to: address of receiving user
1166 $from: address of sending user
1167 $subject: subject of the mail
1168 $text: text of the mail
1170 'EmailUserForm': After building the email user form object.
1171 $form: HTMLForm object
1173 'EmailUserPermissionsErrors': to retrieve permissions errors for emailing a
1175 $user: The user who is trying to email another user.
1176 $editToken: The user's edit token.
1177 &$hookErr: Out-param for the error. Passed as the parameters to
1178 OutputPage::showErrorPage.
1180 'ExemptFromAccountCreationThrottle': Exemption from the account creation
1182 $ip: The ip address of the user
1184 'ExtensionTypes': Called when generating the extensions credits, use this to
1185 change the tables headers.
1186 &$extTypes: associative array of extensions types
1188 'ExtractThumbParameters': Called when extracting thumbnail parameters from a
1189 thumbnail file name.
1190 DEPRECATED: Media handler should override MediaHandler::parseParamString instead.
1191 $thumbname: the base name of the thumbnail file
1192 &$params: the currently extracted params (has source name, temp or archived zone)
1194 'FetchChangesList': When fetching the ChangesList derivative for a particular
1196 $user: User the list is being fetched for
1197 &$skin: Skin object to be used with the list
1198 &$list: List object (defaults to NULL, change it to an object instance and
1199 return false override the list derivative used)
1201 'FileDeleteComplete': When a file is deleted.
1202 $file: reference to the deleted file
1203 $oldimage: in case of the deletion of an old image, the name of the old file
1204 $article: in case all revisions of the file are deleted a reference to the
1205 WikiFilePage associated with the file.
1206 $user: user who performed the deletion
1209 'FileTransformed': When a file is transformed and moved into storage.
1210 $file: reference to the File object
1211 $thumb: the MediaTransformOutput object
1212 $tmpThumbPath: The temporary file system path of the transformed file
1213 $thumbPath: The permanent storage path of the transformed file
1215 'FileUpload': When a file upload occurs.
1216 $file : Image object representing the file that was uploaded
1217 $reupload : Boolean indicating if there was a previously another image there or
1219 $hasDescription : Boolean indicating that there was already a description page
1220 and a new one from the comment wasn't created (since 1.17)
1222 'FileUndeleteComplete': When a file is undeleted
1223 $title: title object to the file
1224 $fileVersions: array of undeleted versions. Empty if all versions were restored
1225 $user: user who performed the undeletion
1228 'FormatAutocomments': When an autocomment is formatted by the Linker.
1229 &$comment: Reference to the accumulated comment. Initially null, when set the
1230 default code will be skipped.
1231 $pre: Initial part of the parsed comment before the call to the hook.
1232 $auto: The extracted part of the parsed comment before the call to the hook.
1233 $post: The final part of the parsed comment before the call to the hook.
1234 $title: An optional title object used to links to sections. Can be null.
1235 $local: Boolean indicating whether section links should refer to local page.
1237 'GalleryGetModes': Get list of classes that can render different modes of a
1239 $modeArray: An associative array mapping mode names to classes that implement
1240 that mode. It is expected all registered classes are a subclass of
1243 'GetAutoPromoteGroups': When determining which autopromote groups a user is
1245 &$user: user to promote.
1246 &$promote: groups that will be added.
1248 'GetBlockedStatus': after loading blocking status of an user from the database
1249 $user: user (object) being checked
1251 'GetCacheVaryCookies': Get cookies that should vary cache options.
1252 $out: OutputPage object
1253 &$cookies: array of cookies name, add a value to it if you want to add a cookie
1254 that have to vary cache options
1256 'GetCanonicalURL': Modify fully-qualified URLs used for IRC and e-mail
1258 $title: Title object of page
1259 $url: string value as output (out parameter, can modify)
1260 $query: query options passed to Title::getCanonicalURL()
1262 'GetDefaultSortkey': Override the default sortkey for a page.
1263 $title: Title object that we need to get a sortkey for
1264 &$sortkey: Sortkey to use.
1266 'GetDoubleUnderscoreIDs': Modify the list of behavior switch (double
1267 underscore) magic words. Called by MagicWord.
1268 &$doubleUnderscoreIDs: array of strings
1270 'GetExtendedMetadata': Get extended file metadata for the API
1271 &$combinedMeta: Array of the form: 'MetadataPropName' => array(
1272 'value' => prop value, 'source' => 'name of hook' ).
1273 $file: File object of file in question
1274 $context: RequestContext (including language to use)
1275 $single: Only extract the current language; if false, the prop value should
1276 be in the metadata multi-language array format:
1277 mediawiki.org/wiki/Manual:File_metadata_handling#Multi-language_array_format
1278 &$maxCacheTime: how long the results can be cached
1280 'GetFullURL': Modify fully-qualified URLs used in redirects/export/offsite data.
1281 $title: Title object of page
1282 $url: string value as output (out parameter, can modify)
1283 $query: query options passed to Title::getFullURL()
1285 'GetHumanTimestamp': Pre-emptively override the human-readable timestamp generated
1286 by MWTimestamp::getHumanTimestamp(). Return false in this hook to use the custom
1288 &$output: string for the output timestamp
1289 $timestamp: MWTimestamp object of the current (user-adjusted) timestamp
1290 $relativeTo: MWTimestamp object of the relative (user-adjusted) timestamp
1291 $user: User whose preferences are being used to make timestamp
1292 $lang: Language that will be used to render the timestamp
1294 'GetInternalURL': Modify fully-qualified URLs used for squid cache purging.
1295 $title: Title object of page
1296 $url: string value as output (out parameter, can modify)
1297 $query: query options passed to Title::getInternalURL()
1299 'GetIP': modify the ip of the current user (called only once).
1300 &$ip: string holding the ip as determined so far
1302 'GetLinkColours': modify the CSS class of an array of page links.
1303 $linkcolour_ids: array of prefixed DB keys of the pages linked to,
1305 &$colours: (output) array of CSS classes, indexed by prefixed DB keys
1307 'GetLocalURL': Modify local URLs as output into page links. Note that if you are
1308 working with internal urls (non-interwiki) then it may be preferable to work
1309 with the GetLocalURL::Internal or GetLocalURL::Article hooks as GetLocalURL can
1310 be buggy for internal urls on render if you do not re-implement the horrible
1311 hack that Title::getLocalURL uses in your own extension.
1312 $title: Title object of page
1313 &$url: string value as output (out parameter, can modify)
1314 $query: query options passed to Title::getLocalURL()
1316 'GetLocalURL::Internal': Modify local URLs to internal pages.
1317 $title: Title object of page
1318 &$url: string value as output (out parameter, can modify)
1319 $query: query options passed to Title::getLocalURL()
1321 'GetLocalURL::Article': Modify local URLs specifically pointing to article paths
1322 without any fancy queries or variants.
1323 $title: Title object of page
1324 &$url: string value as output (out parameter, can modify)
1326 'GetLogTypesOnUser': Add log types where the target is a userpage
1327 &$types: Array of log types
1329 'GetMetadataVersion': Modify the image metadata version currently in use. This
1330 is used when requesting image metadata from a ForeignApiRepo. Media handlers
1331 that need to have versioned metadata should add an element to the end of the
1332 version array of the form 'handler_name=version'. Most media handlers won't need
1333 to do this unless they broke backwards compatibility with a previous version of
1334 the media handler metadata output.
1335 &$version: Array of version strings
1337 'GetNewMessagesAlert': Disable or modify the new messages alert
1338 &$newMessagesAlert: An empty string by default. If the user has new talk page
1339 messages, this should be populated with an alert message to that effect
1340 $newtalks: An empty array if the user has no new messages or an array containing
1341 links and revisions if there are new messages (See User::getNewMessageLinks)
1342 $user: The user object of the user who is loading the page
1343 $out: OutputPage object (to check what type of page the user is on)
1345 'GetPreferences': Modify user preferences.
1346 $user: User whose preferences are being modified.
1347 &$preferences: Preferences description array, to be fed to an HTMLForm object
1349 'GetRelativeTimestamp': Pre-emptively override the relative timestamp generated
1350 by MWTimestamp::getRelativeTimestamp(). Return false in this hook to use the custom
1352 &$output: string for the output timestamp
1353 &$diff: DateInterval representing the difference between the timestamps
1354 $timestamp: MWTimestamp object of the current (user-adjusted) timestamp
1355 $relativeTo: MWTimestamp object of the relative (user-adjusted) timestamp
1356 $user: User whose preferences are being used to make timestamp
1357 $lang: Language that will be used to render the timestamp
1359 'getUserPermissionsErrors': Add a permissions error when permissions errors are
1360 checked for. Use instead of userCan for most cases. Return false if the user
1361 can't do it, and populate $result with the reason in the form of
1362 array( messagename, param1, param2, ... ). For consistency, error messages
1363 should be plain text with no special coloring, bolding, etc. to show that
1364 they're errors; presenting them properly to the user as errors is done by the
1366 $title: Title object being checked against
1367 $user : Current user object
1368 $action: Action being checked
1369 $result: User permissions error to add. If none, return true.
1371 'getUserPermissionsErrorsExpensive': Equal to getUserPermissionsErrors, but is
1372 called only if expensive checks are enabled. Add a permissions error when
1373 permissions errors are checked for. Return false if the user can't do it, and
1374 populate $result with the reason in the form of array( messagename, param1,
1375 param2, ... ). For consistency, error messages should be plain text with no
1376 special coloring, bolding, etc. to show that they're errors; presenting them
1377 properly to the user as errors is done by the caller.
1379 $title: Title object being checked against
1380 $user : Current user object
1381 $action: Action being checked
1382 $result: User permissions error to add. If none, return true.
1384 'GitViewers': Called when generating the list of git viewers for
1385 Special:Version, use this to change the list.
1386 &$extTypes: associative array of repo URLS to viewer URLs.
1388 'HistoryRevisionTools': Override or extend the revision tools available from the
1389 page history view, i.e. undo, rollback, etc.
1390 $rev: Revision object
1391 &$links: Array of HTML links
1393 'HTMLFileCache::useFileCache': Override whether a page should be cached in file
1395 $context: An IContextSource object with information about the request being served.
1397 'ImageBeforeProduceHTML': Called before producing the HTML created by a wiki
1398 image insertion. You can skip the default logic entirely by returning false, or
1399 just modify a few things using call-by-reference.
1401 &$title: Title object of the image
1402 &$file: File object, or false if it doesn't exist
1403 &$frameParams: Various parameters with special meanings; see documentation in
1404 includes/Linker.php for Linker::makeImageLink
1405 &$handlerParams: Various parameters with special meanings; see documentation in
1406 includes/Linker.php for Linker::makeImageLink
1407 &$time: Timestamp of file in 'YYYYMMDDHHIISS' string form, or false for current
1408 &$res: Final HTML output, used if you return false
1411 'ImageOpenShowImageInlineBefore': Call potential extension just before showing
1412 the image on an image page.
1413 $imagePage: ImagePage object ($this)
1416 'ImagePageAfterImageLinks': Called after the image links section on an image
1418 $imagePage: ImagePage object ($this)
1419 &$html: HTML for the hook to add
1421 'ImagePageFileHistoryLine': Called when a file history line is constructed.
1423 $line: the HTML of the history line
1424 $css: the line CSS class
1426 'ImagePageFindFile': Called when fetching the file associated with an image
1428 $page: ImagePage object
1430 &$displayFile: displayed File object
1432 'ImagePageShowTOC': Called when the file toc on an image page is generated.
1433 $page: ImagePage object
1434 &$toc: Array of <li> strings
1436 'ImgAuthBeforeStream': executed before file is streamed to user, but only when
1438 &$title: the Title object of the file as it would appear for the upload page
1439 &$path: the original file and path name when img_auth was invoked by the the web
1441 &$name: the name only component of the file
1442 &$result: The location to pass back results of the hook routine (only used if
1444 $result[0]=The index of the header message
1445 $result[1]=The index of the body text message
1446 $result[2 through n]=Parameters passed to body text message. Please note the
1447 header message cannot receive/use parameters.
1449 'ImportHandleLogItemXMLTag': When parsing a XML tag in a log item.
1450 $reader: XMLReader object
1451 $logInfo: Array of information
1452 Return false to stop further processing of the tag
1454 'ImportHandlePageXMLTag': When parsing a XML tag in a page.
1455 $reader: XMLReader object
1456 $pageInfo: Array of information
1457 Return false to stop further processing of the tag
1459 'ImportHandleRevisionXMLTag': When parsing a XML tag in a page revision.
1460 $reader: XMLReader object
1461 $pageInfo: Array of page information
1462 $revisionInfo: Array of revision information
1463 Return false to stop further processing of the tag
1465 'ImportHandleToplevelXMLTag': When parsing a top level XML tag.
1466 $reader: XMLReader object
1467 Return false to stop further processing of the tag
1469 'ImportHandleUploadXMLTag': When parsing a XML tag in a file upload.
1470 $reader: XMLReader object
1471 $revisionInfo: Array of information
1472 Return false to stop further processing of the tag
1474 'InfoAction': When building information to display on the action=info page.
1475 $context: IContextSource object
1476 &$pageInfo: Array of information
1478 'InitializeArticleMaybeRedirect': MediaWiki check to see if title is a redirect.
1479 $title: Title object for the current page
1480 $request: WebRequest
1481 $ignoreRedirect: boolean to skip redirect check
1482 $target: Title/string of redirect target
1483 $article: Article object
1485 'InterwikiLoadPrefix': When resolving if a given prefix is an interwiki or not.
1486 Return true without providing an interwiki to continue interwiki search.
1487 $prefix: interwiki prefix we are looking for.
1488 &$iwData: output array describing the interwiki with keys iw_url, iw_local,
1489 iw_trans and optionally iw_api and iw_wikiid.
1491 'InternalParseBeforeSanitize': during Parser's internalParse method just before
1492 the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/
1493 includeonly/onlyinclude and other processings. Ideal for syntax-extensions after
1494 template/parser function execution which respect nowiki and HTML-comments.
1495 &$parser: Parser object
1496 &$text: string containing partially parsed text
1497 &$stripState: Parser's internal StripState object
1499 'InternalParseBeforeLinks': during Parser's internalParse method before links
1500 but after nowiki/noinclude/includeonly/onlyinclude and other processings.
1501 &$parser: Parser object
1502 &$text: string containing partially parsed text
1503 &$stripState: Parser's internal StripState object
1505 'InvalidateEmailComplete': Called after a user's email has been invalidated
1507 $user: user (object) whose email is being invalidated
1509 'IRCLineURL': When constructing the URL to use in an IRC notification.
1510 Callee may modify $url and $query, URL will be constructed as $url . $query
1511 &$url: URL to index.php
1512 &$query: Query string
1513 $rc: RecentChange object that triggered url generation
1515 'IsFileCacheable': Override the result of Article::isFileCacheable() (if true)
1516 $article: article (object) being checked
1518 'IsTrustedProxy': Override the result of wfIsTrustedProxy()
1520 $result: Change this value to override the result of wfIsTrustedProxy()
1522 'IsUploadAllowedFromUrl': Override the result of UploadFromUrl::isAllowedUrl()
1523 $url: URL used to upload from
1524 &$allowed: Boolean indicating if uploading is allowed for given URL
1526 'isValidEmailAddr': Override the result of Sanitizer::validateEmail(), for
1527 instance to return false if the domain name doesn't match your organization.
1528 $addr: The e-mail address entered by the user
1529 &$result: Set this and return false to override the internal checks
1531 'isValidPassword': Override the result of User::isValidPassword()
1532 $password: The password entered by the user
1533 &$result: Set this and return false to override the internal checks
1534 $user: User the password is being validated for
1536 'Language::getMessagesFileName':
1537 $code: The language code or the language we're looking for a messages file for
1538 &$file: The messages file path, you can override this to change the location.
1540 'LanguageGetNamespaces': Provide custom ordering for namespaces or
1541 remove namespaces. Do not use this hook to add namespaces. Use
1542 CanonicalNamespaces for that.
1543 &$namespaces: Array of namespaces indexed by their numbers
1545 'LanguageGetMagic': DEPRECATED, use $magicWords in a file listed in
1546 $wgExtensionMessagesFiles instead.
1547 Use this to define synonyms of magic words depending of the language
1548 $magicExtensions: associative array of magic words synonyms
1549 $lang: language code (string)
1551 'LanguageGetSpecialPageAliases': DEPRECATED, use $specialPageAliases in a file
1552 listed in $wgExtensionMessagesFiles instead.
1553 Use to define aliases of special pages names depending of the language
1554 $specialPageAliases: associative array of magic words synonyms
1555 $lang: language code (string)
1557 'LanguageGetTranslatedLanguageNames': Provide translated language names.
1558 &$names: array of language code => language name
1559 $code language of the preferred translations
1561 'LanguageLinks': Manipulate a page's language links. This is called
1562 in various places to allow extensions to define the effective language
1564 $title: The page's Title.
1565 &$links: Associative array mapping language codes to prefixed links of the
1566 form "language:title".
1567 &$linkFlags: Associative array mapping prefixed links to arrays of flags.
1568 Currently unused, but planned to provide support for marking individual
1569 language links in the UI, e.g. for featured articles.
1571 'LanguageSelector': Hook to change the language selector available on a page.
1572 $out: The output page.
1573 $cssClassName: CSS class name of the language selector.
1575 'LinkBegin': Used when generating internal and interwiki links in
1576 Linker::link(), before processing starts. Return false to skip default
1577 processing and return $ret. See documentation for Linker::link() for details on
1578 the expected meanings of parameters.
1579 $skin: the Skin object
1580 $target: the Title that the link is pointing to
1581 &$html: the contents that the <a> tag should have (raw HTML); null means
1583 &$customAttribs: the HTML attributes that the <a> tag should have, in
1584 associative array form, with keys and values unescaped. Should be merged with
1585 default values, with a value of false meaning to suppress the attribute.
1586 &$query: the query string to add to the generated URL (the bit after the "?"),
1587 in associative array form, with keys and values unescaped.
1588 &$options: array of options. Can include 'known', 'broken', 'noclasses'.
1589 &$ret: the value to return if your hook returns false.
1591 'LinkEnd': Used when generating internal and interwiki links in Linker::link(),
1592 just before the function returns a value. If you return true, an <a> element
1593 with HTML attributes $attribs and contents $html will be returned. If you
1594 return false, $ret will be returned.
1595 $skin: the Skin object
1596 $target: the Title object that the link is pointing to
1597 $options: the options. Will always include either 'known' or 'broken', and may
1598 include 'noclasses'.
1599 &$html: the final (raw HTML) contents of the <a> tag, after processing.
1600 &$attribs: the final HTML attributes of the <a> tag, after processing, in
1601 associative array form.
1602 &$ret: the value to return if your hook returns false.
1604 'LinkerMakeExternalImage': At the end of Linker::makeExternalImage() just
1606 &$url: the image url
1607 &$alt: the image's alt text
1608 &$img: the new image HTML (if returning false)
1610 'LinkerMakeExternalLink': At the end of Linker::makeExternalLink() just
1613 &$text: the link text
1614 &$link: the new link HTML (if returning false)
1615 &$attribs: the attributes to be applied.
1616 $linkType: The external link type
1618 'LinkerMakeMediaLinkFile': At the end of Linker::makeMediaLinkFile() just
1620 $title: the Title object that the link is pointing to
1621 $file: the File object or false if broken link
1622 &$html: the link text
1623 &$attribs: the attributes to be applied
1624 &$ret: the value to return if your hook returns false
1626 'LinksUpdate': At the beginning of LinksUpdate::doUpdate() just before the
1628 &$linksUpdate: the LinksUpdate object
1630 'LinksUpdateAfterInsert': At the end of LinksUpdate::incrTableUpdate() after
1631 each link table insert. For example, pagelinks, imagelinks, externallinks.
1632 $linksUpdate: LinksUpdate object
1633 $table: the table to insert links to
1634 $insertions: an array of links to insert
1636 'LinksUpdateComplete': At the end of LinksUpdate::doUpdate() when updating,
1637 including delete and insert, has completed for all link tables
1638 &$linksUpdate: the LinksUpdate object
1640 'LinksUpdateConstructed': At the end of LinksUpdate() is construction.
1641 &$linksUpdate: the LinksUpdate object
1643 'ListDefinedTags': When trying to find all defined tags.
1644 &$tags: The list of tags.
1646 'LoadExtensionSchemaUpdates': Called during database installation and updates.
1647 &updater: A DatabaseUpdater subclass
1649 'LocalFile::getHistory': Called before file history query performed.
1650 $file: the File object
1652 $fields: select fields
1654 $opts: query options
1655 $join_conds: JOIN conditions
1657 'LocalFilePurgeThumbnails': Called before thumbnails for a local file a purged.
1658 $file: the File object
1659 $archiveName: name of an old file version or false if it's the current one
1661 'LocalisationCacheRecache': Called when loading the localisation data into
1663 $cache: The LocalisationCache object
1664 $code: language code
1665 &$alldata: The localisation data from core and extensions
1666 &purgeBlobs: whether to purge/update the message blobs via MessageBlobStore::clear()
1668 'LocalisationCacheRecacheFallback': Called for each language when merging
1669 fallback data into the cache.
1670 $cache: The LocalisationCache object
1671 $code: language code
1672 &$alldata: The localisation data from core and extensions. Note some keys may
1673 be omitted if they won't be merged into the final result.
1675 'LocalisationChecksBlacklist': When fetching the blacklist of
1676 localisation checks.
1677 &$blacklist: array of checks to blacklist. See the bottom of
1678 maintenance/language/checkLanguage.inc for the format of this variable.
1680 'LocalisationIgnoredOptionalMessages': When fetching the list of ignored and
1681 optional localisation messages
1682 &$ignored Array of ignored message keys
1683 &$optional Array of optional message keys
1685 'LogEventsListShowLogExtract': Called before the string is added to OutputPage.
1686 Returning false will prevent the string from being added to the OutputPage.
1687 &$s: html string to show for the log extract
1688 $types: String or Array Log types to show
1689 $page: String or Title The page title to show log entries for
1690 $user: String The user who made the log entries
1691 $param: Associative Array with the following additional options:
1692 - lim Integer Limit of items to show, default is 50
1693 - conds Array Extra conditions for the query (e.g. "log_action != 'revision'")
1694 - showIfEmpty boolean Set to false if you don't want any output in case the
1695 loglist is empty if set to true (default), "No matching items in log" is
1696 displayed if loglist is empty
1697 - msgKey Array If you want a nice box with a message, set this to the key of
1698 the message. First element is the message key, additional optional elements
1699 are parameters for the key that are processed with
1700 wfMessage()->params()->parseAsBlock()
1701 - offset Set to overwrite offset parameter in $wgRequest set to '' to unset
1703 - wrap String Wrap the message in html (usually something like
1704 "<div ...>$1</div>").
1705 - flags Integer display flags (NO_ACTION_LINK,NO_EXTRA_USER_LINKS)
1707 'LoginAuthenticateAudit': A login attempt for a valid user account either
1708 succeeded or failed. No return data is accepted; this hook is for auditing only.
1709 $user: the User object being authenticated against
1710 $password: the password being submitted and found wanting
1711 $retval: a LoginForm class constant with authenticateUserData() return
1712 value (SUCCESS, WRONG_PASS, etc.).
1714 'LoginPasswordResetMessage': User is being requested to reset their password on login.
1715 Use this hook to change the Message that will be output on Special:ChangePassword.
1716 &$msg: Message object that will be shown to the user
1717 $username: Username of the user who's password was expired.
1719 'LogLine': Processes a single log entry on Special:Log.
1720 $log_type: string for the type of log entry (e.g. 'move'). Corresponds to
1721 logging.log_type database field.
1722 $log_action: string for the type of log action (e.g. 'delete', 'block',
1723 'create2'). Corresponds to logging.log_action database field.
1724 $title: Title object that corresponds to logging.log_namespace and
1725 logging.log_title database fields.
1726 $paramArray: Array of parameters that corresponds to logging.log_params field.
1727 Note that only $paramArray[0] appears to contain anything.
1728 &$comment: string that corresponds to logging.log_comment database field, and
1729 which is displayed in the UI.
1730 &$revert: string that is displayed in the UI, similar to $comment.
1731 $time: timestamp of the log entry (added in 1.12)
1733 'LonelyPagesQuery': Allow extensions to modify the query used by
1734 Special:LonelyPages.
1735 &$tables: tables to join in the query
1736 &$conds: conditions for the query
1737 &$joinConds: join conditions for the query
1739 'MaintenanceRefreshLinksInit': before executing the refreshLinks.php maintenance
1741 $refreshLinks: RefreshLinks object
1743 'MagicWordwgVariableIDs': When defining new magic words IDs.
1744 $variableIDs: array of strings
1746 'MakeGlobalVariablesScript': Called at end of OutputPage::getJSVars.
1747 Ideally, this hook should only be used to add variables that depend on
1748 the current page/request; static configuration should be added through
1749 ResourceLoaderGetConfigVars instead.
1750 &$vars: variable (or multiple variables) to be added into the output of
1751 Skin::makeVariablesScript
1752 $out: The OutputPage which called the hook, can be used to get the real title.
1754 'MarkPatrolled': Before an edit is marked patrolled.
1755 $rcid: ID of the revision to be marked patrolled
1756 $user: the user (object) marking the revision as patrolled
1757 $wcOnlySysopsCanPatrol: config setting indicating whether the user needs to be a
1758 sysop in order to mark an edit patrolled.
1760 'MarkPatrolledComplete': After an edit is marked patrolled.
1761 $rcid: ID of the revision marked as patrolled
1762 $user: user (object) who marked the edit patrolled
1763 $wcOnlySysopsCanPatrol: config setting indicating whether the user must be a
1764 sysop to patrol the edit.
1766 'MediaWikiPerformAction': Override MediaWiki::performAction(). Use this to do
1767 something completely different, after the basic globals have been set up, but
1768 before ordinary actions take place.
1770 $article: Article on which the action will be performed
1771 $title: Title on which the action will be performed
1773 $request: $wgRequest
1774 $mediaWiki: The $mediawiki object
1776 'MessagesPreLoad': When loading a message from the database.
1777 $title: title of the message (string)
1778 $message: value (string), change it to the message you want to define
1780 'MessageCache::get': When fetching a message. Can be used to override the key
1781 for customisations. Given and returned message key must be in special format:
1782 1) first letter must be in lower case according to the content language.
1783 2) spaces must be replaced with underscores
1784 &$key: message key (string)
1786 'MessageCacheReplace': When a message page is changed. Useful for updating
1788 $title: name of the page changed.
1789 $text: new contents of the page.
1791 'MimeMagicInit': Before processing the list mapping MIME types to media types
1792 and the list mapping MIME types to file extensions.
1793 As an extension author, you are encouraged to submit patches to MediaWiki's
1794 core to add new MIME types to mime.types.
1795 $mimeMagic: Instance of MimeMagic.
1796 Use $mimeMagic->addExtraInfo( $stringOfInfo );
1797 for adding new MIME info to the list.
1798 Use $mimeMagic->addExtraTypes( $stringOfTypes );
1799 for adding new MIME types to the list.
1801 'MimeMagicImproveFromExtension': Allows MW extensions to further improve the
1802 MIME type detected by considering the file extension.
1803 $mimeMagic: Instance of MimeMagic.
1804 $ext: File extension.
1805 &$mime: MIME type (in/out).
1807 'MimeMagicGuessFromContent': Allows MW extensions guess the MIME by content.
1808 $mimeMagic: Instance of MimeMagic.
1809 &$head: First 1024 bytes of the file in a string (in - Do not alter!).
1810 &$tail: More or equal than last 65558 bytes of the file in a string
1811 (in - Do not alter!).
1813 &$mime: MIME type (out).
1815 'ModifyExportQuery': Modify the query used by the exporter.
1816 $db: The database object to be queried.
1817 &$tables: Tables in the query.
1818 &$conds: Conditions in the query.
1819 &$opts: Options for the query.
1820 &$join_conds: Join conditions for the query.
1822 'BaseTemplateToolbox': Called by BaseTemplate when building the $toolbox array
1823 and returning it for the skin to output. You can add items to the toolbox while
1824 still letting the skin make final decisions on skin-specific markup conventions
1826 &$sk: The BaseTemplate base skin template
1827 &$toolbox: An array of toolbox items, see BaseTemplate::getToolbox and
1828 BaseTemplate::makeListItem for details on the format of individual items
1829 inside of this array.
1831 'NamespaceIsMovable': Called when determining if it is possible to pages in a
1833 $index: Integer; the index of the namespace being checked.
1834 $result: Boolean; whether MediaWiki currently thinks that pages in this
1835 namespace are movable. Hooks may change this value to override the return
1836 value of MWNamespace::isMovable().
1838 'NewRevisionFromEditComplete': Called when a revision was inserted due to an
1840 $wikiPage: the WikiPage edited
1841 $rev: the new revision
1842 $baseID: the revision ID this was based off, if any
1843 $user: the editing user
1845 'NormalizeMessageKey': Called before the software gets the text of a message
1846 (stuff in the MediaWiki: namespace), useful for changing WHAT message gets
1848 &$key: the message being looked up. Change this to something else to change
1849 what message gets displayed (string)
1850 &$useDB: whether or not to look up the message in the database (bool)
1851 &$langCode: the language code to get the message for (string) - or -
1852 whether to use the content language (true) or site language (false) (bool)
1853 &$transform: whether or not to expand variables and templates
1854 in the message (bool)
1856 'OldChangesListRecentChangesLine': Customize entire recent changes line, or
1857 return false to omit the line from RecentChanges and Watchlist special pages.
1858 &$changeslist: The OldChangesList instance.
1859 &$s: HTML of the form "<li>...</li>" containing one RC entry.
1860 &$rc: The RecentChange object.
1861 &$classes: array of css classes for the <li> element
1863 'OpenSearchUrls': Called when constructing the OpenSearch description XML. Hooks
1864 can alter or append to the array of URLs for search & suggestion formats.
1865 &$urls: array of associative arrays with Url element attributes
1867 'OtherBlockLogLink': Get links to the block log from extensions which blocks
1868 users and/or IP addresses too.
1869 $otherBlockLink: An array with links to other block logs
1870 $ip: The requested IP address or username
1872 'OutputPageBeforeHTML': A page has been processed by the parser and the
1873 resulting HTML is about to be displayed.
1874 $parserOutput: the parserOutput (object) that corresponds to the page
1875 $text: the text that will be displayed, in HTML (string)
1877 'OutputPageBodyAttributes': Called when OutputPage::headElement is creating the
1878 body tag to allow for extensions to add attributes to the body of the page they
1879 might need. Or to allow building extensions to add body classes that aren't of
1880 high enough demand to be included in core.
1881 $out: The OutputPage which called the hook, can be used to get the real title
1882 $sk: The Skin that called OutputPage::headElement
1883 &$bodyAttrs: An array of attributes for the body tag passed to Html::openElement
1885 'OutputPageCheckLastModified': when checking if the page has been modified
1886 since the last visit.
1887 &$modifiedTimes: array of timestamps.
1888 The following keys are set: page, user, epoch
1890 'OutputPageParserOutput': after adding a parserOutput to $wgOut
1891 $out: OutputPage instance (object)
1892 $parserOutput: parserOutput instance being added in $out
1894 'OutputPageMakeCategoryLinks': Links are about to be generated for the page's
1895 categories. Implementations should return false if they generate the category
1896 links, so the default link generation is skipped.
1897 $out: OutputPage instance (object)
1898 $categories: associative array, keys are category names, values are category
1899 types ("normal" or "hidden")
1900 $links: array, intended to hold the result. Must be an associative array with
1901 category types as keys and arrays of HTML links as values.
1903 'PageContentInsertComplete': After a new article is created.
1904 $wikiPage: WikiPage created
1905 $user: User creating the article
1906 $content: New content as a Content object
1907 $summary: Edit summary/comment
1908 $isMinor: Whether or not the edit was marked as minor
1909 $isWatch: (No longer used)
1910 $section: (No longer used)
1911 $flags: Flags passed to WikiPage::doEditContent()
1912 $revision: New Revision of the article
1914 'PageContentLanguage': Allows changing the language in which the content of a
1915 page is written. Defaults to the wiki content language ($wgContLang).
1916 $title: Title object
1917 &$pageLang: the page content language (either an object or a language code)
1918 $wgLang: the user language
1920 'PageContentSave': Before an article is saved.
1921 $wikiPage: the WikiPage (object) being saved
1922 $user: the user (object) saving the article
1923 $content: the new article content, as a Content object
1924 $summary: the article summary (comment)
1925 $isminor: minor flag
1926 $iswatch: watch flag
1929 'PageContentSaveComplete': After an article has been updated.
1930 $wikiPage: WikiPage modified
1931 $user: User performing the modification
1932 $content: New content, as a Content object
1933 $summary: Edit summary/comment
1934 $isMinor: Whether or not the edit was marked as minor
1935 $isWatch: (No longer used)
1936 $section: (No longer used)
1937 $flags: Flags passed to WikiPage::doEditContent()
1938 $revision: New Revision of the article (can be null for edits that change nothing)
1939 $status: Status object about to be returned by doEditContent()
1940 $baseRevId: the rev ID (or false) this edit was based on
1942 'PageHistoryBeforeList': When a history page list is about to be constructed.
1943 $article: the article that the history is loading for
1944 $context: RequestContext object
1946 'PageHistoryLineEnding': Right before the end <li> is added to a history line.
1947 $row: the revision row for this line
1948 $s: the string representing this parsed line
1949 $classes: array containing the <li> element classes
1951 'PageHistoryPager::getQueryInfo': when a history pager query parameter set is
1954 $queryInfo: the query parameters
1956 'PageRenderingHash': Alter the parser cache option hash key. A parser extension
1957 which depends on user options should install this hook and append its values to
1959 &$confstr: reference to a hash key string which can be modified
1960 $user: User (object) requesting the page
1962 'ParserAfterParse': Called from Parser::parse() just after the call to
1963 Parser::internalParse() returns.
1964 $parser: parser object
1965 $text: text being parsed
1966 $stripState: stripState used (object)
1968 'ParserAfterStrip': Called at end of parsing time.
1969 TODO: No more strip, deprecated ?
1970 $parser: parser object
1971 $text: text being parsed
1972 $stripState: stripState used (object)
1974 'ParserAfterTidy': Called after Parser::tidy() in Parser::parse()
1975 $parser: Parser object being used
1976 $text: text that will be returned
1978 'ParserBeforeInternalParse': Called at the beginning of Parser::internalParse().
1979 $parser: Parser object
1980 $text: text to parse
1981 $stripState: StripState instance being used
1983 'ParserBeforeStrip': Called at start of parsing time.
1984 TODO: No more strip, deprecated ?
1985 $parser: parser object
1986 $text: text being parsed
1987 $stripState: stripState used (object)
1989 'ParserBeforeTidy': Called before tidy and custom tags replacements.
1990 $parser: Parser object being used
1993 'ParserClearState': Called at the end of Parser::clearState().
1994 $parser: Parser object being cleared
1996 'ParserCloned': Called when the parser is cloned.
1997 $parser: Newly-cloned Parser object
1999 'ParserFirstCallInit': Called when the parser initialises for the first time.
2000 &$parser: Parser object being cleared
2002 'ParserGetVariableValueSwitch': Called when the parser need the value of a
2004 $parser: Parser object
2005 $varCache: array to store the value in case of multiples calls of the
2007 $index: index (string) of the magic
2008 $ret: value of the magic word (the hook should set it)
2009 $frame: PPFrame object to use for expanding any template variables
2011 'ParserGetVariableValueTs': Use this to change the value of the time for the
2012 {{LOCAL...}} magic word.
2013 $parser: Parser object
2014 $time: actual time (timestamp)
2016 'ParserGetVariableValueVarCache': use this to change the value of the variable
2017 cache or return false to not use it.
2018 $parser: Parser object
2019 $varCache: variable cache (array)
2021 'ParserLimitReport': DEPRECATED, use ParserLimitReportPrepare and
2022 ParserLimitReportFormat instead.
2023 Called at the end of Parser:parse() when the parser will
2024 include comments about size of the text parsed.
2025 $parser: Parser object
2026 &$limitReport: text that will be included (without comment tags)
2028 'ParserLimitReportFormat': Called for each row in the parser limit report that
2029 needs formatting. If nothing handles this hook, the default is to use "$key" to
2030 get the label, and "$key-value" or "$key-value-text"/"$key-value-html" to
2032 $key: Key for the limit report item (string)
2033 &$value: Value of the limit report item
2034 &$report: String onto which to append the data
2035 $isHTML: If true, $report is an HTML table with two columns; if false, it's
2036 text intended for display in a monospaced font.
2037 $localize: If false, $report should be output in English.
2039 'ParserLimitReportPrepare': Called at the end of Parser:parse() when the parser will
2040 include comments about size of the text parsed. Hooks should use
2041 $output->setLimitReportData() to populate data. Functions for this hook should
2042 not use $wgLang; do that in ParserLimitReportFormat instead.
2043 $parser: Parser object
2044 $output: ParserOutput object
2046 'ParserMakeImageParams': Called before the parser make an image link, use this
2047 to modify the parameters of the image.
2048 $title: title object representing the file
2049 $file: file object that will be used to create the image
2050 &$params: 2-D array of parameters
2051 $parser: Parser object that called the hook
2053 'ParserSectionCreate': Called each time the parser creates a document section
2054 from wikitext. Use this to apply per-section modifications to HTML (like
2055 wrapping the section in a DIV). Caveat: DIVs are valid wikitext, and a DIV
2056 can begin in one section and end in another. Make sure your code can handle
2057 that case gracefully. See the EditSectionClearerLink extension for an example.
2058 $parser: the calling Parser instance
2059 $section: the section number, zero-based, but section 0 is usually empty
2060 &$sectionContent: ref to the content of the section. modify this.
2061 $showEditLinks: boolean describing whether this section has an edit link
2063 'ParserTestParser': Called when creating a new instance of Parser in
2064 tests/parser/parserTest.inc.
2065 $parser: Parser object created
2067 'ParserTestGlobals': Allows to define globals for parser tests.
2068 &$globals: Array with all the globals which should be set for parser tests.
2069 The arrays keys serve as the globals names, its values are the globals values.
2071 'ParserTestTables': Alter the list of tables to duplicate when parser tests are
2072 run. Use when page save hooks require the presence of custom tables to ensure
2073 that tests continue to run properly.
2074 &$tables: array of table names
2076 'PersonalUrls': Alter the user-specific navigation links (e.g. "my page,
2077 my talk page, my contributions" etc).
2078 &$personal_urls: Array of link specifiers (see SkinTemplate.php)
2079 &$title: Title object representing the current page
2080 $skin: SkinTemplate object providing context (e.g. to check if the user is logged in, etc.)
2082 'PingLimiter': Allows extensions to override the results of User::pingLimiter().
2083 &$user : User performing the action
2084 $action : Action being performed
2085 &$result : Whether or not the action should be prevented
2086 Change $result and return false to give a definitive answer, otherwise
2087 the built-in rate limiting checks are used, if enabled.
2088 $incrBy: Amount to increment counter by
2090 'PlaceNewSection': Override placement of new sections. Return false and put the
2091 merged text into $text to override the default behavior.
2092 $wikipage : WikiPage object
2093 $oldtext : the text of the article before editing
2094 $subject : subject of the new section
2095 &$text : text of the new section
2097 'PostLoginRedirect': Modify the post login redirect behavior.
2098 Occurs after signing up or logging in, allows for interception of redirect.
2099 &$returnTo: The page name to return to, as a string
2100 &$returnToQuery: array of url parameters, mapping parameter names to values
2101 &$type: type of login redirect as string;
2102 error: display a return to link ignoring $wgRedirectOnLogin
2103 signup: display a return to link using $wgRedirectOnLogin if needed
2104 success: display a return to link using $wgRedirectOnLogin if needed
2105 successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
2107 'PreferencesGetLegend': Override the text used for the <legend> of a
2108 preferences section.
2109 $form: the PreferencesForm object. This is a ContextSource as well
2110 $key: the section name
2111 &$legend: the legend text. Defaults to wfMessage( "prefs-$key" )->text() but may be overridden
2113 'PreferencesFormPreSave': Override preferences being saved
2114 $formData: array of user submitted data
2115 $form: PreferencesForm object, also a ContextSource
2116 $user: User object with preferences to be saved set
2117 &$result: boolean indicating success
2119 'PrefixSearchBackend': Override the title prefix search used for OpenSearch and
2120 AJAX search suggestions. Put results into &$results outparam and return false.
2121 $ns : array of int namespace keys to search in
2122 $search : search term (not guaranteed to be conveniently normalized)
2123 $limit : maximum number of results to return
2124 &$results : out param: array of page names (strings)
2126 'PrefsEmailAudit': Called when user changes their email address.
2127 $user: User (object) changing his email address
2128 $oldaddr: old email address (string)
2129 $newaddr: new email address (string)
2131 'PrefsPasswordAudit': Called when user changes his password.
2132 $user: User (object) changing his password
2133 $newPass: new password
2134 $error: error (string) 'badretype', 'wrongpassword', 'error' or 'success'
2136 'ProtectionForm::buildForm': Called after all protection type fieldsets are made
2138 $article: the title being (un)protected
2139 $output: a string of the form HTML so far
2141 'ProtectionForm::save': Called when a protection form is submitted.
2142 $article: the Page being (un)protected
2143 &$errorMsg: an html message string of an error or an array of message name and
2145 $reasonstr: a string describing the reason page protection level is altered
2147 'ProtectionForm::showLogExtract': Called after the protection log extract is
2149 $article: the page the form is shown for
2150 $out: OutputPage object
2152 'RawPageViewBeforeOutput': Right before the text is blown out in action=raw.
2153 &$obj: RawAction object
2154 &$text: The text that's going to be the output
2156 'RecentChange_save': Called at the end of RecentChange::save().
2157 $recentChange: RecentChange object
2159 'RedirectSpecialArticleRedirectParams': Lets you alter the set of parameter
2160 names such as "oldid" that are preserved when using redirecting special pages
2161 such as Special:MyPage and Special:MyTalk.
2162 &$redirectParams: An array of parameters preserved by redirecting special pages.
2164 'RequestContextCreateSkin': Called when RequestContext::getSkin creates a skin
2165 instance. Can be used by an extension override what skin is used in certain
2167 IContextSource $context: The RequestContext the skin is being created for.
2168 &$skin: A variable reference you may set a Skin instance or string key on to
2169 override the skin that will be used for the context.
2171 'ResetPasswordExpiration': Allow extensions to set a default password expiration
2172 $user: The user having their password expiration reset
2173 &$newExpire: The new expiration date
2175 'ResetSessionID': Called from wfResetSessionID
2176 $oldSessionID: old session id
2177 $newSessionID: new session id
2179 'ResourceLoaderGetConfigVars': Called at the end of
2180 ResourceLoaderStartUpModule::getConfigSettings(). Use this to export static
2181 configuration variables to JavaScript. Things that depend on the current page
2182 or request state must be added through MakeGlobalVariablesScript instead.
2183 &$vars: array( variable name => value )
2185 'ResourceLoaderRegisterModules': Right before modules information is required,
2186 such as when responding to a resource
2187 loader request or generating HTML output.
2188 &$resourceLoader: ResourceLoader object
2190 'ResourceLoaderTestModules': Let you add new JavaScript testing modules. This is
2191 called after the addition of 'qunit' and MediaWiki testing resources.
2192 &testModules: array of JavaScript testing modules. The 'qunit' framework,
2193 included in core, is fed using tests/qunit/QUnitTestResources.php.
2194 &ResourceLoader object
2196 To add a new qunit module named 'myext.tests':
2197 testModules['qunit']['myext.tests'] = array(
2198 'script' => 'extension/myext/tests.js',
2199 'dependencies' => <any module dependency you might have>
2201 For QUnit framework, the mediawiki.tests.qunit.testrunner dependency will be
2202 added to any module.
2204 'RevisionInsertComplete': Called after a revision is inserted into the database.
2205 &$revision: the Revision
2206 $data: the data stored in old_text. The meaning depends on $flags: if external
2207 is set, it's the URL of the revision text in external storage; otherwise,
2208 it's the revision text itself. In either case, if gzip is set, the revision
2210 $flags: a comma-delimited list of strings representing the options used. May
2211 include: utf8 (this will always be set for new revisions); gzip; external.
2213 'SearchGetNearMatchBefore': Perform exact-title-matches in "go" searches before
2214 the normal operations.
2215 $allSearchTerms : Array of the search terms in all content languages
2216 &$titleResult : Outparam; the value to return. A Title object or null.
2218 'SearchAfterNoDirectMatch': If there was no match for the exact result. This
2219 runs before lettercase variants are attempted, whereas 'SearchGetNearMatch'
2221 $term : Search term string
2222 &$title : Outparam; set to $title object and return false for a match
2224 'SearchGetNearMatch': An extra chance for exact-title-matches in "go" searches
2225 if nothing was found.
2226 $term : Search term string
2227 &$title : Outparam; set to $title object and return false for a match
2229 'SearchGetNearMatchComplete': A chance to modify exact-title-matches in "go"
2231 $term : Search term string
2232 &$title : Current Title object that is being returned (null if none found).
2234 'SearchResultInitFromTitle': Set the revision used when displaying a page in
2236 $title : Current Title object being displayed in search results.
2237 &$id: Revision ID (default is false, for latest)
2239 'SearchableNamespaces': An option to modify which namespaces are searchable.
2240 &$arr : Array of namespaces ($nsId => $name) which will be used.
2242 'SelfLinkBegin': Called before a link to the current article is displayed to
2243 allow the display of the link to be customized.
2244 $nt: the Title object
2245 &$html: html to display for the link
2246 &$trail: optional text to display before $html
2247 &$prefix: optional text to display after $html
2248 &$ret: the value to return if your hook returns false
2250 'SetupAfterCache': Called in Setup.php, after cache objects are set
2252 'ShowMissingArticle': Called when generating the output for a non-existent page.
2253 $article: The article object corresponding to the page
2255 'ShowRawCssJs': Customise the output of raw CSS and JavaScript in page views.
2256 DEPRECATED, use the ContentGetParserOutput hook instead!
2257 $text: Text being shown
2258 $title: Title of the custom script/stylesheet page
2259 $output: Current OutputPage object
2261 'ShowSearchHitTitle': Customise display of search hit title/link.
2262 &$title: Title to link to
2263 &$text: Text to use for the link
2264 $result: The search result
2265 $terms: The search terms entered
2266 $page: The SpecialSearch object.
2268 'ShowSearchHit': Customize display of search hit.
2269 $searchPage: The SpecialSearch instance.
2270 $result: The SearchResult to show
2271 $terms: Search terms, for highlighting
2272 &$link: HTML of link to the matching page. May be modified.
2273 &$redirect: HTML of redirect info. May be modified.
2274 &$section: HTML of matching section. May be modified.
2275 &$extract: HTML of content extract. May be modified.
2276 &$score: HTML of score. May be modified.
2277 &$size: HTML of page size. May be modified.
2278 &$date: HTML of of page modification date. May be modified.
2279 &$related: HTML of additional info for the matching page. May be modified.
2280 &$html: May be set to the full HTML that should be used to represent the search
2281 hit. Must include the <li> ... </li> tags. Will only be used if the hook
2282 function returned false.
2284 'SiteNoticeBefore': Before the sitenotice/anonnotice is composed. Return true to
2285 allow the normal method of notice selection/rendering to work, or change the
2286 value of $siteNotice and return false to alter it.
2287 &$siteNotice: HTML returned as the sitenotice
2290 'SiteNoticeAfter': After the sitenotice/anonnotice is composed.
2291 &$siteNotice: HTML sitenotice. Alter the contents of $siteNotice to add to/alter
2292 the sitenotice/anonnotice.
2295 'SkinAfterBottomScripts': At the end of Skin::bottomScripts().
2297 &$text: bottomScripts Text. Append to $text to add additional text/scripts after
2298 the stock bottom scripts.
2300 'SkinAfterContent': Allows extensions to add text after the page content and
2301 article metadata. This hook should work in all skins. Set the &$data variable to
2302 the text you're going to add.
2303 &$data: (string) Text to be printed out directly (without parsing)
2306 'SkinBuildSidebar': At the end of Skin::buildSidebar().
2308 &$bar: Sidebar contents
2309 Modify $bar to add or modify sidebar portlets.
2311 'SidebarBeforeOutput': Allows to edit sidebar just before its output by skins.
2313 &$bar: Sidebar content
2314 Modify $bar to add or modify sidebar portlets.
2315 Warning: This hook is run on each display. You should consider to use 'SkinBuildSidebar' that is aggressively cached.
2317 'SkinCopyrightFooter': Allow for site and per-namespace customization of
2319 $title: displayed page title
2320 $type: 'normal' or 'history' for old/diff views
2321 &$msg: overridable message; usually 'copyright' or 'history_copyright'. This
2322 message must be in HTML format, not wikitext!
2323 &$link: overridable HTML link to be passed into the message as $1
2324 &$forContent: overridable flag if copyright footer is shown in content language.
2325 This parameter is deprecated.
2327 'SkinGetPoweredBy': TODO
2328 &$text: additional 'powered by' icons in HTML. Note: Modern skin does not use
2329 the MediaWiki icon but plain text instead.
2332 'SkinPreloadExistence': Supply titles that should be added to link existence
2333 cache before the page is rendered.
2334 &$titles: Array of Title objects
2337 'SkinSubPageSubtitle': At the beginning of Skin::subPageSubtitle().
2338 &$subpages: Subpage links HTML
2340 $out: OutputPage object
2341 If false is returned $subpages will be used instead of the HTML
2342 subPageSubtitle() generates.
2343 If true is returned, $subpages will be ignored and the rest of
2344 subPageSubtitle() will run.
2346 'SkinTemplateBuildNavUrlsNav_urlsAfterPermalink': After creating the "permanent
2348 $sktemplate: SkinTemplate object
2349 $nav_urls: array of tabs
2351 'SkinTemplateGetLanguageLink': After building the data for a language link from
2352 which the actual html is constructed.
2353 &$languageLink: array containing data about the link. The following keys can be
2354 modified: href, text, title, class, lang, hreflang. Each of them is a string.
2355 $languageLinkTitle: Title object belonging to the external language link.
2356 $title: Title object of the page the link belongs to.
2357 $outputPage: The OutputPage object the links are built from.
2359 To alter the structured navigation links in SkinTemplates, there are three
2360 hooks called in different spots:
2362 'SkinTemplateNavigation': Called on content pages after the tabs have been
2363 added, but before variants have been added.
2364 'SkinTemplateNavigation::SpecialPage': Called on special pages after the special
2365 tab is added but before variants have been added.
2366 'SkinTemplateNavigation::Universal': Called on both content and special pages
2367 after variants have been added.
2368 &$sktemplate: SkinTemplate object
2369 &$links: Structured navigation links. This is used to alter the navigation for
2370 skins which use buildNavigationUrls such as Vector.
2372 'SkinTemplateOutputPageBeforeExec': Before SkinTemplate::outputPage() starts
2374 &$sktemplate: SkinTemplate object
2375 &$tpl: Template engine object
2377 'SkinTemplatePreventOtherActiveTabs': Use this to prevent showing active tabs.
2378 $sktemplate: SkinTemplate object
2379 $res: set to true to prevent active tabs
2381 'SkinTemplateTabAction': Override SkinTemplate::tabAction().
2382 You can either create your own array, or alter the parameters for
2384 &$sktemplate: The SkinTemplate instance.
2385 $title: Title instance for the page.
2386 $message: Visible label of tab.
2387 $selected: Whether this is a selected tab.
2388 $checkEdit: Whether or not the action=edit query should be added if appropriate.
2389 &$classes: Array of CSS classes to apply.
2390 &$query: Query string to add to link.
2392 &$result: Complete assoc. array if you want to return true.
2394 'SkinTemplateToolboxEnd': Called by SkinTemplate skins after toolbox links have
2395 been rendered (useful for adding more).
2396 $sk: The QuickTemplate based skin template running the hook.
2397 $dummy: Called when SkinTemplateToolboxEnd is used from a BaseTemplate skin,
2398 extensions that add support for BaseTemplateToolbox should watch for this
2399 dummy parameter with "$dummy=false" in their code and return without echoing
2400 any HTML to avoid creating duplicate toolbox items.
2402 'SoftwareInfo': Called by Special:Version for returning information about the
2404 $software: The array of software in format 'name' => 'version'. See
2405 SpecialVersion::softwareInformation().
2407 'SpecialPageBeforeFormDisplay': Before executing the HTMLForm object.
2408 $name: name of the special page
2409 &$form: HTMLForm object
2411 'SpecialBlockModifyFormFields': Add more fields to Special:Block
2412 $sp: SpecialPage object, for context
2413 &$fields: Current HTMLForm fields
2415 'SpecialContributionsBeforeMainOutput': Before the form on Special:Contributions
2416 $id: User id number, only provided for backwards-compatibility
2417 $user: User object representing user contributions are being fetched for
2418 $sp: SpecialPage instance, providing context
2420 'SpecialListusersDefaultQuery': Called right before the end of
2421 UsersPager::getDefaultQuery().
2422 $pager: The UsersPager instance
2423 $query: The query array to be returned
2425 'SpecialListusersFormatRow': Called right before the end of
2426 UsersPager::formatRow().
2427 $item: HTML to be returned. Will be wrapped in <li></li> after the hook finishes
2428 $row: Database row object
2430 'SpecialListusersHeader': Called before closing the <fieldset> in
2431 UsersPager::getPageHeader().
2432 $pager: The UsersPager instance
2433 $out: The header HTML
2435 'SpecialListusersHeaderForm': Called before adding the submit button in
2436 UsersPager::getPageHeader().
2437 $pager: The UsersPager instance
2438 $out: The header HTML
2440 'SpecialListusersQueryInfo': Called right before the end of.
2441 UsersPager::getQueryInfo()
2442 $pager: The UsersPager instance
2443 $query: The query array to be returned
2445 'SpecialMovepageAfterMove': Called after moving a page.
2446 $movePage: MovePageForm object
2447 $oldTitle: old title (object)
2448 $newTitle: new title (object)
2450 'SpecialNewpagesConditions': Called when building sql query for
2452 &$special: NewPagesPager object (subclass of ReverseChronologicalPager)
2453 $opts: FormOptions object containing special page options
2454 &$conds: array of WHERE conditionals for query
2455 &tables: array of tables to be queried
2456 &$fields: array of columns to select
2457 &$join_conds: join conditions for the tables
2459 'SpecialNewPagesFilters': Called after building form options at NewPages.
2460 $special: the special page object
2461 &$filters: associative array of filter definitions. The keys are the HTML
2462 name/URL parameters. Each key maps to an associative array with a 'msg'
2463 (message key) and a 'default' value.
2465 'SpecialPage_initList': Called when setting up SpecialPageFactory::$list, use this
2466 hook to remove a core special page.
2467 $list: list (array) of core special pages
2469 'SpecialPageAfterExecute': Called after SpecialPage::execute.
2470 $special: the SpecialPage object
2471 $subPage: the subpage string or null if no subpage was specified
2473 'SpecialPageBeforeExecute': Called before SpecialPage::execute.
2474 $special: the SpecialPage object
2475 $subPage: the subpage string or null if no subpage was specified
2477 'SpecialPasswordResetOnSubmit': When executing a form submission on
2478 Special:PasswordReset.
2479 $users: array of User objects.
2480 $data: array of data submitted by the user
2481 &$error: string, error code (message key) used to describe to error (out
2482 parameter). The hook needs to return false when setting this, otherwise it
2483 will have no effect.
2485 'SpecialRandomGetRandomTitle': Called during the execution of Special:Random,
2486 use this to change some selection criteria or substitute a different title.
2487 &$randstr: The random number from wfRandom()
2488 &$isRedir: Boolean, whether to select a redirect or non-redirect
2489 &$namespaces: An array of namespace indexes to get the title from
2490 &$extra: An array of extra SQL statements
2491 &$title: If the hook returns false, a Title object to use instead of the
2492 result from the normal query
2494 'SpecialRecentChangesFilters': Called after building form options at
2495 RecentChanges. Deprecated, use ChangesListSpecialPageFilters instead.
2496 $special: the special page object
2497 &$filters: associative array of filter definitions. The keys are the HTML
2498 name/URL parameters. Each key maps to an associative array with a 'msg'
2499 (message key) and a 'default' value.
2501 'SpecialRecentChangesPanel': Called when building form options in
2502 SpecialRecentChanges.
2503 &$extraOpts: array of added items, to which can be added
2504 $opts: FormOptions for this request
2506 'SpecialRecentChangesQuery': Called when building SQL query for
2507 SpecialRecentChanges and SpecialRecentChangesLinked. Deprecated, use
2508 ChangesListSpecialPageQuery instead.
2509 &$conds: array of WHERE conditionals for query
2510 &$tables: array of tables to be queried
2511 &$join_conds: join conditions for the tables
2512 $opts: FormOptions for this request
2513 &$query_options: array of options for the database request
2514 &$select: Array of columns to select
2516 'SpecialResetTokensTokens': Called when building token list for
2518 &$tokens: array of token information arrays in the format of
2519 array( 'preference' => '<preference-name>', 'label-message' => '<message-key>' )
2521 'SpecialSearchCreateLink': Called when making the message to create a page or
2522 go to the existing page.
2523 $t: title object searched for
2524 &$params: an array of the default message name and page title (as parameter)
2526 'SpecialSearchNogomatch': Called when user clicked the "Go" button but the
2527 target doesn't exist.
2528 &$title: title object generated from the text entered by the user
2530 'SpecialSearchPowerBox': The equivalent of SpecialSearchProfileForm for
2531 the advanced form, a.k.a. power search box.
2532 &$showSections: an array to add values with more options to
2533 $term: the search term (not a title object)
2534 $opts: an array of hidden options (containing 'redirs' and 'profile')
2536 'SpecialSearchProfiles': Allows modification of search profiles.
2537 &$profiles: profiles, which can be modified.
2539 'SpecialSearchProfileForm': Allows modification of search profile forms.
2540 $search: special page object
2541 &$form: String: form html
2542 $profile: String: current search profile
2543 $term: String: search term
2544 $opts: Array: key => value of hidden options for inclusion in custom forms
2546 'SpecialSearchSetupEngine': Allows passing custom data to search engine.
2547 $search: SpecialSearch special page object
2548 $profile: String: current search profile
2549 $engine: the search engine
2551 'SpecialSearchResultsPrepend': Called immediately before returning HTML
2552 on the search results page. Useful for including an external search
2553 provider. To disable the output of MediaWiki search output, return
2555 $specialSearch: SpecialSearch object ($this)
2557 $term: Search term specified by the user
2559 'SpecialSearchResults': Called before search result display
2560 $term: string of search term
2561 &$titleMatches: empty or SearchResultSet object
2562 &$textMatches: empty or SearchResultSet object
2564 'SpecialStatsAddExtra': Add extra statistic at the end of Special:Statistics.
2565 &$extraStats: Array to save the new stats
2566 ( $extraStats['<name of statistic>'] => <value>; )
2568 'SpecialUploadComplete': Called after successfully uploading a file from
2570 $form: The SpecialUpload object
2572 'SpecialVersionVersionUrl': Called when building the URL for Special:Version.
2573 $wgVersion: Current $wgVersion for you to use
2574 &$versionUrl: Raw url to link to (eg: release notes)
2576 'SpecialWatchlistFilters': Called after building form options at Watchlist.
2577 Deprecated, use ChangesListSpecialPageFilters instead.
2578 $special: the special page object
2579 &$filters: associative array of filter definitions. The keys are the HTML
2580 name/URL parameters. Each key maps to an associative array with a 'msg'
2581 (message key) and a 'default' value.
2583 'SpecialWatchlistQuery': Called when building sql query for SpecialWatchlist.
2584 Deprecated, use ChangesListSpecialPageQuery instead.
2585 &$conds: array of WHERE conditionals for query
2586 &$tables: array of tables to be queried
2587 &$join_conds: join conditions for the tables
2588 &$fields: array of query fields
2589 $opts: A FormOptions object with watchlist options for the current request
2591 'SpecialWatchlistGetNonRevisionTypes': Called when building sql query for
2592 SpecialWatchlist. Allows extensions to register custom values they have
2593 inserted to rc_type so they can be returned as part of the watchlist.
2594 &$nonRevisionTypes: array of values in the rc_type field of recentchanges table
2596 'TestCanonicalRedirect': Called when about to force a redirect to a canonical
2597 URL for a title when we have no other parameters on the URL. Gives a chance for
2598 extensions that alter page view behavior radically to abort that redirect or
2600 $request: WebRequest
2601 $title: Title of the currently found title obj
2602 $output: OutputPage object
2604 'ThumbnailBeforeProduceHTML': Called before an image HTML is about to be
2605 rendered (by ThumbnailImage:toHtml method).
2606 $thumbnail: the ThumbnailImage object
2607 &$attribs: image attribute array
2608 &$linkAttribs: image link attribute array
2610 'TitleArrayFromResult': Called when creating an TitleArray object from a
2612 &$titleArray: set this to an object to override the default object returned
2613 $res: database result used to create the object
2615 'TitleExists': Called when determining whether a page exists at a given title.
2616 $title: The title being tested.
2617 &$exists: Whether the title exists.
2619 'TitleQuickPermissions': Called from Title::checkQuickPermissions to add to
2620 or override the quick permissions check.
2621 $title: The Title object being accessed
2622 $user: The User performing the action
2623 $action: Action being performed
2624 &$errors: Array of errors
2625 $doExpensiveQueries: Whether to do expensive DB queries
2626 $short: Whether to return immediately on first error
2628 'TitleGetEditNotices': Allows extensions to add edit notices
2629 $title: The Title object for the page the edit notices are for
2630 $oldid: Revision ID that the edit notices are for (or 0 for latest)
2631 &$notices: Array of notices. Keys are i18n message keys, values are parseAsBlock()ed messages.
2633 'TitleGetRestrictionTypes': Allows extensions to modify the types of protection
2634 that can be applied.
2635 $title: The title in question.
2636 &$types: The types of protection available.
2638 'TitleIsCssOrJsPage': Called when determining if a page is a CSS or JS page.
2639 $title: Title object that is being checked
2640 $result: Boolean; whether MediaWiki currently thinks this is a CSS/JS page.
2641 Hooks may change this value to override the return value of
2642 Title::isCssOrJsPage().
2644 'TitleIsAlwaysKnown': Called when determining if a page exists. Allows
2645 overriding default behavior for determining if a page exists. If $isKnown is
2646 kept as null, regular checks happen. If it's a boolean, this value is returned
2647 by the isKnown method.
2648 $title: Title object that is being checked
2649 &$isKnown: Boolean|null; whether MediaWiki currently thinks this page is known
2651 'TitleIsMovable': Called when determining if it is possible to move a page. Note
2652 that this hook is not called for interwiki pages or pages in immovable
2653 namespaces: for these, isMovable() always returns false.
2654 $title: Title object that is being checked
2655 $result: Boolean; whether MediaWiki currently thinks this page is movable.
2656 Hooks may change this value to override the return value of
2659 'TitleIsWikitextPage': Called when determining if a page is a wikitext or should
2660 be handled by separate handler (via ArticleViewCustom).
2661 $title: Title object that is being checked
2662 $result: Boolean; whether MediaWiki currently thinks this is a wikitext page.
2663 Hooks may change this value to override the return value of
2664 Title::isWikitextPage()
2666 'TitleMove': Before moving an article (title).
2669 $user: user who does the move
2671 'TitleMoveComplete': After moving an article (title).
2674 $user: user who did the move
2675 $pageid: database ID of the page that's been moved
2676 $redirid: database ID of the created redirect
2677 $reason: reason for the move
2679 'TitleReadWhitelist': Called at the end of read permissions checks, just before
2680 adding the default error message if nothing allows the user to read the page. If
2681 a handler wants a title to *not* be whitelisted, it should also return false.
2682 $title: Title object being checked against
2683 $user: Current user object
2684 &$whitelisted: Boolean value of whether this title is whitelisted
2686 'TitleSquidURLs': Called to determine which URLs to purge from HTTP caches.
2687 $title: Title object to purge
2688 &$urls: An array of URLs to purge from the caches, to be manipulated.
2690 'UndeleteForm::showHistory': Called in UndeleteForm::showHistory, after a
2691 PageArchive object has been created but before any further processing is done.
2692 &$archive: PageArchive object
2693 $title: Title object of the page that we're viewing
2695 'UndeleteForm::showRevision': Called in UndeleteForm::showRevision, after a
2696 PageArchive object has been created but before any further processing is done.
2697 &$archive: PageArchive object
2698 $title: Title object of the page that we're viewing
2700 'UndeleteForm::undelete': Called un UndeleteForm::undelete, after checking that
2701 the site is not in read-only mode, that the Title object is not null and after
2702 a PageArchive object has been constructed but before performing any further
2704 &$archive: PageArchive object
2705 $title: Title object of the page that we're about to undelete
2707 'UndeleteShowRevision': Called when showing a revision in Special:Undelete.
2708 $title: title object related to the revision
2709 $rev: revision (object) that will be viewed
2711 'UnknownAction': An unknown "action" has occurred (useful for defining your own
2713 $action: action name
2714 $article: article "acted on"
2716 'UnitTestsList': Called when building a list of files with PHPUnit tests.
2717 &$files: list of files
2719 'UnwatchArticle': Before a watch is removed from an article.
2720 $user: user watching
2721 $page: WikiPage object to be removed
2722 &$status: Status object to be returned if the hook returns false
2724 'UnwatchArticleComplete': After a watch is removed from an article.
2725 $user: user that watched
2726 $page: WikiPage object that was watched
2728 'UpdateUserMailerFormattedPageStatus': Before notification email gets sent.
2729 $formattedPageStatus: list of valid page states
2731 'UploadForm:initial': Before the upload form is generated. You might set the
2732 member-variables $uploadFormTextTop and $uploadFormTextAfterSummary to inject
2733 text (HTML) either before or after the editform.
2734 $form: UploadForm object
2736 'UploadForm:BeforeProcessing': At the beginning of processUpload(). Lets you
2737 poke at member variables like $mUploadDescription before the file is saved. Do
2738 not use this hook to break upload processing. This will return the user to a
2739 blank form with no error message; use UploadVerification and UploadVerifyFile
2741 $form: UploadForm object
2743 'UploadCreateFromRequest': When UploadBase::createFromRequest has been called.
2744 $type: (string) the requested upload type
2745 &$className: the class name of the Upload instance to be created
2747 'UploadComplete': when Upload completes an upload.
2748 &$upload: an UploadBase child instance
2750 'UploadFormInitDescriptor': After the descriptor for the upload form as been
2752 $descriptor: (array) the HTMLForm descriptor
2754 'UploadFormSourceDescriptors': after the standard source inputs have been
2755 added to the descriptor
2756 $descriptor: (array) the HTMLForm descriptor
2758 'UploadVerification': Additional chances to reject an uploaded file. Consider
2759 using UploadVerifyFile instead.
2760 string $saveName: destination file name
2761 string $tempName: filesystem path to the temporary file for checks
2762 string &$error: output: message key for message to show if upload canceled by
2763 returning false. May also be an array, where the first element is the message
2764 key and the remaining elements are used as parameters to the message.
2766 'UploadVerifyFile': extra file verification, based on MIME type, etc. Preferred
2767 in most cases over UploadVerification.
2768 object $upload: an instance of UploadBase, with all info about the upload
2769 string $mime: The uploaded file's MIME type, as detected by MediaWiki. Handlers
2770 will typically only apply for specific MIME types.
2771 object &$error: output: true if the file is valid. Otherwise, an indexed array
2772 representing the problem with the file, where the first element is the message
2773 key and the remaining elements are used as parameters to the message.
2775 'UploadComplete': Upon completion of a file upload.
2776 $uploadBase: UploadBase (or subclass) object. File can be accessed by
2777 $uploadBase->getLocalFile().
2779 'User::mailPasswordInternal': before creation and mailing of a user's new
2781 $user: the user who sent the message out
2782 $ip: IP of the user who sent the message out
2783 $u: the account whose new password will be set
2785 'UserAddGroup': Called when adding a group; return false to override
2786 stock group addition.
2787 $user: the user object that is to have a group added
2788 &$group: the group to add, can be modified
2790 'UserArrayFromResult': Called when creating an UserArray object from a database
2792 &$userArray: set this to an object to override the default object returned
2793 $res: database result used to create the object
2795 'userCan': To interrupt/advise the "user can do X to Y article" check. If you
2796 want to display an error message, try getUserPermissionsErrors.
2797 $title: Title object being checked against
2798 $user : Current user object
2799 $action: Action being checked
2800 $result: Pointer to result returned if hook returns false. If null is returned,
2801 userCan checks are continued by internal code.
2803 'UserCanSendEmail': To override User::canSendEmail() permission check.
2804 $user: User (object) whose permission is being checked
2805 &$canSend: bool set on input, can override on output
2807 'UserClearNewTalkNotification': Called when clearing the "You have new
2808 messages!" message, return false to not delete it.
2809 $user: User (object) that will clear the message
2810 $oldid: ID of the talk page revision being viewed (0 means the most recent one)
2812 'UserCreateForm': change to manipulate the login form
2813 $template: SimpleTemplate instance for the form
2815 'UserEffectiveGroups': Called in User::getEffectiveGroups().
2816 $user: User to get groups for
2817 &$groups: Current effective groups
2819 'UserGetAllRights': After calculating a list of all available rights.
2820 &$rights: Array of rights, which may be added to.
2822 'UserGetDefaultOptions': After fetching the core default, this hook is run right
2823 before returning the options to the caller. Warning: This hook is called for
2824 every call to User::getDefaultOptions(), which means it's potentially called
2825 dozens or hundreds of times. You may want to cache the results of non-trivial
2826 operations in your hook function for this reason.
2827 &$defaultOptions: Array of preference keys and their default values.
2829 'UserGetEmail': Called when getting an user email address.
2831 &$email: email, change this to override local email
2833 'UserGetEmailAuthenticationTimestamp': Called when getting the timestamp of
2834 email authentication.
2836 &$timestamp: timestamp, change this to override local email authentication
2839 'UserGetImplicitGroups': Called in User::getImplicitGroups().
2840 &$groups: List of implicit (automatically-assigned) groups
2842 'UserGetLanguageObject': Called when getting user's interface language object.
2844 &$code: Language code that will be used to create the object
2845 $context: RequestContext object
2847 'UserGetReservedNames': Allows to modify $wgReservedUsernames at run time.
2848 &$reservedUsernames: $wgReservedUsernames
2850 'UserGetRights': Called in User::getRights().
2851 $user: User to get rights for
2852 &$rights: Current rights
2854 'UserIsBlockedFrom': Check if a user is blocked from a specific page (for
2855 specific block exemptions).
2856 $user: User in question
2857 $title: Title of the page in question
2858 &$blocked: Out-param, whether or not the user is blocked from that page.
2859 &$allowUsertalk: If the user is blocked, whether or not the block allows users
2860 to edit their own user talk pages.
2862 'UserIsBlockedGlobally': Check if user is blocked on all wikis.
2864 $ip: User's IP address
2865 &$blocked: Whether the user is blocked, to be modified by the hook
2867 'UserIsEveryoneAllowed': Check if all users are allowed some user right; return
2868 false if a UserGetRights hook might remove the named right.
2869 $right: The user right being checked
2871 'UserLoadAfterLoadFromSession': Called to authenticate users on external or
2872 environmental means; occurs after session is loaded.
2873 $user: user object being loaded
2875 'UserLoadDefaults': Called when loading a default user.
2879 'UserLoadFromDatabase': Called when loading a user from the database.
2881 &$s: database query object
2883 'UserLoadFromSession': Called to authenticate users on external/environmental
2884 means; occurs before session is loaded.
2885 $user: user object being loaded
2886 &$result: set this to a boolean value to abort the normal authentication
2889 'UserLoadOptions': When user options/preferences are being loaded from the
2892 &$options: Options, can be modified.
2894 'UserLoginComplete': After a user has logged in.
2895 $user: the user object that was created on login
2896 $inject_html: Any HTML to inject after the "logged in" message.
2898 'UserLoginForm': change to manipulate the login form
2899 $template: SimpleTemplate instance for the form
2901 'UserLogout': Before a user logs out.
2902 $user: the user object that is about to be logged out
2904 'UserLogoutComplete': After a user has logged out.
2905 $user: the user object _after_ logout (won't have name, ID, etc.)
2906 $inject_html: Any HTML to inject after the "logged out" message.
2907 $oldName: name of the user before logout (string)
2909 'UserRemoveGroup': Called when removing a group; return false to override stock
2911 $user: the user object that is to have a group removed
2912 &$group: the group to be removed, can be modified
2914 'UserRights': After a user's group memberships are changed.
2915 $user : User object that was changed
2916 $add : Array of strings corresponding to groups added
2917 $remove: Array of strings corresponding to groups removed
2919 'UserRequiresHTTPS': Called to determine whether a user needs
2920 to be switched to HTTPS.
2921 $user: User in question.
2922 &$https: Boolean whether $user should be switched to HTTPS.
2924 'UserResetAllOptions': Called in User::resetOptions() when user preferences
2925 have been requested to be reset. This hook can be used to exclude certain
2926 options from being reset even when the user has requested all prefs to be reset,
2927 because certain options might be stored in the user_properties database table
2928 despite not being visible and editable via Special:Preferences.
2929 $user: the User (object) whose preferences are being reset
2930 &$newOptions: array of new (site default) preferences
2931 $options: array of the user's old preferences
2932 $resetKinds: array containing the kinds of preferences to reset
2934 'UserRetrieveNewTalks': Called when retrieving "You have new messages!"
2936 $user: user retrieving new talks messages
2937 $talks: array of new talks page(s)
2939 'UserSaveSettings': Called when saving user settings.
2942 'UserSaveOptions': Called just before saving user preferences/options.
2944 &$options: Options, modifiable
2946 'UserSetCookies': Called when setting user cookies.
2948 &$session: session array, will be added to $_SESSION
2949 &$cookies: cookies array mapping cookie name to its value
2951 'UserSetEmail': Called when changing user email address.
2953 &$email: new email, change this to override new email address
2955 'UserSetEmailAuthenticationTimestamp': Called when setting the timestamp of
2956 email authentication.
2958 &$timestamp: new timestamp, change this to override local email
2959 authentication timestamp
2961 'UserToolLinksEdit': Called when generating a list of user tool links, e.g.
2962 "Foobar (Talk | Contribs | Block)".
2963 $userId: User id of the current user
2964 $userText: User name of the current user
2965 &$items: Array of user tool links as HTML fragments
2967 'ValidateExtendedMetadataCache': Called to validate the cached metadata in
2968 FormatMetadata::getExtendedMeta (return false means cache will be
2969 invalidated and GetExtendedMetadata hook called again).
2970 $timestamp: The timestamp metadata was generated
2971 $file: The file the metadata is for
2973 'UserMailerChangeReturnPath': Called to generate a VERP return address
2974 when UserMailer sends an email, with a bounce handling extension.
2975 $to: Array of MailAddress objects for the recipients
2976 &$returnPath: The return address string
2978 'WantedPages::getQueryInfo': Called in WantedPagesPage::getQueryInfo(), can be
2979 used to alter the SQL query which gets the list of wanted pages.
2980 &$wantedPages: WantedPagesPage object
2981 &$query: query array, see QueryPage::getQueryInfo() for format documentation
2983 'WatchArticle': Before a watch is added to an article.
2984 $user: user that will watch
2985 $page: WikiPage object to be watched
2986 &$status: Status object to be returned if the hook returns false
2988 'WatchArticleComplete': After a watch is added to an article.
2989 $user: user that watched
2990 $page: WikiPage object watched
2992 'WatchlistEditorBeforeFormRender': Before building the Special:EditWatchlist
2993 form, used to manipulate the list of pages or preload data based on that list.
2994 &$watchlistInfo: array of watchlisted pages in
2995 [namespaceId => ['title1' => 1, 'title2' => 1]] format
2997 'WatchlistEditorBuildRemoveLine': when building remove lines in
2998 Special:Watchlist/edit.
2999 &$tools: array of extra links
3000 $title: Title object
3001 $redirect: whether the page is a redirect
3003 &$link: HTML link to title
3005 'WebRequestPathInfoRouter': While building the PathRouter to parse the
3007 $router: The PathRouter instance
3009 'WebResponseSetCookie': when setting a cookie in WebResponse::setcookie().
3010 Return false to prevent setting of the cookie.
3011 &$name: Cookie name passed to WebResponse::setcookie()
3012 &$value: Cookie value passed to WebResponse::setcookie()
3013 &$expire: Cookie expiration, as for PHP's setcookie()
3014 $options: Options passed to WebResponse::setcookie()
3016 'WhatLinksHereProps': Allows annotations to be added to WhatLinksHere
3017 $row: The DB row of the entry.
3018 $title: The Title of the page where the link comes FROM
3019 $target: The Title of the page where the link goes TO
3020 &$props: Array of HTML strings to display after the title.
3022 'WikiExporter::dumpStableQuery': Get the SELECT query for "stable" revisions
3023 dumps. One, and only one hook should set this, and return false.
3024 &$tables: Database tables to use in the SELECT query
3025 &$opts: Options to use for the query
3026 &$join: Join conditions
3028 'WikiPageDeletionUpdates': manipulate the list of DataUpdates to be applied when
3029 a page is deleted. Called in WikiPage::getDeletionUpdates(). Note that updates
3030 specific to a content model should be provided by the respective Content's
3031 getDeletionUpdates() method.
3033 $content: the Content to generate updates for
3034 &$updates: the array of DataUpdate objects. Hook function may want to add to it.
3036 'wfShellWikiCmd': Called when generating a shell-escaped command line string to
3037 run a MediaWiki cli script.
3038 &$script: MediaWiki cli script path
3039 &$parameters: Array of arguments and options to the script
3040 &$options: Associative array of options, may contain the 'php' and 'wrapper'
3043 'wgQueryPages': Called when initialising list of QueryPage subclasses, use this
3044 to add new query pages to be updated with maintenance/updateSpecialPages.php.
3045 $qp: The list of QueryPages
3047 'XmlDumpWriterOpenPage': Called at the end of XmlDumpWriter::openPage, to allow
3048 extra metadata to be added.
3049 $obj: The XmlDumpWriter object.
3050 &$out: The output string.
3051 $row: The database row for the page.
3052 $title: The title of the page.
3054 'XmlDumpWriterWriteRevision': Called at the end of a revision in an XML dump, to
3056 $obj: The XmlDumpWriter object.
3057 &$out: The text being output.
3058 $row: The database row for the revision.
3059 $text: The revision text.
3061 'XMPGetInfo': Called when obtaining the list of XMP tags to extract. Can be used
3062 to add additional tags to extract.
3063 &$items: Array containing information on which items to extract. See XMPInfo for
3064 details on the format.
3066 'XMPGetResults': Called just before returning the results array of parsing xmp
3067 data. Can be used to post-process the results.
3068 &$data: Array of metadata sections (such as $data['xmp-general']) each section
3069 is an array of metadata tags returned (each tag is either a value, or an array
3072 More hooks might be available but undocumented, you can execute
3073 "php maintenance/findHooks.php" to find hidden ones.