3 This document describes how event hooks work in MediaWiki; how to add
4 hooks for an event; and how to run hooks for an event.
9 Something that happens with the wiki. For example: a user logs
10 in. A wiki page is saved. A wiki page is deleted. Often there are
11 two events associated with a single action: one before the code
12 is run to make the event happen, and one after. Each event has a
13 name, preferably in CamelCase. For example, 'UserLogin',
14 'ArticleSave', 'ArticleSaveComplete', 'ArticleDelete'.
17 A clump of code and data that should be run when an event
18 happens. This can be either a function and a chunk of data, or an
22 The function part of a hook.
26 Hooks allow us to decouple optionally-run code from code that is run
27 for everyone. It allows MediaWiki hackers, third-party developers and
28 local administrators to define code that will be run at certain points
29 in the mainline code, and to modify the data run by that mainline
30 code. Hooks can keep mainline code simple, and make it easier to
31 write extensions. Hooks are a principled alternative to local patches.
33 Consider, for example, two options in MediaWiki. One reverses the
34 order of a title before displaying the article; the other converts the
35 title to all uppercase letters. Currently, in MediaWiki code, we
36 would handle this as follows (note: not real code, here):
38 function showAnArticle($article) {
39 global $wgReverseTitle, $wgCapitalizeTitle;
41 if ($wgReverseTitle) {
42 wfReverseTitle($article);
45 if ($wgCapitalizeTitle) {
46 wfCapitalizeTitle($article);
49 # code to actually show the article goes here
52 An extension writer, or a local admin, will often add custom code to
53 the function -- with or without a global variable. For example,
54 someone wanting email notification when an article is shown may add:
56 function showAnArticle($article) {
57 global $wgReverseTitle, $wgCapitalizeTitle;
59 if ($wgReverseTitle) {
60 wfReverseTitle($article);
63 if ($wgCapitalizeTitle) {
64 wfCapitalizeTitle($article);
67 # code to actually show the article goes here
69 if ($wgNotifyArticle) {
70 wfNotifyArticleShow($article));
74 Using a hook-running strategy, we can avoid having all this
75 option-specific stuff in our mainline code. Using hooks, the function
78 function showAnArticle($article) {
80 if (wfRunHooks('ArticleShow', array(&$article))) {
82 # code to actually show the article goes here
84 wfRunHooks('ArticleShowComplete', array(&$article));
88 We've cleaned up the code here by removing clumps of weird,
89 infrequently used code and moving them off somewhere else. It's much
90 easier for someone working with this code to see what's _really_ going
91 on, and make changes or fix bugs.
93 In addition, we can take all the code that deals with the little-used
94 title-reversing options (say) and put it in one place. Instead of
95 having little title-reversing if-blocks spread all over the codebase
96 in showAnArticle, deleteAnArticle, exportArticle, etc., we can
97 concentrate it all in an extension file:
99 function reverseArticleTitle($article) {
103 function reverseForExport($article) {
107 The setup function for the extension just has to add its hook
108 functions to the appropriate events:
110 setupTitleReversingExtension() {
113 $wgHooks['ArticleShow'][] = 'reverseArticleTitle';
114 $wgHooks['ArticleDelete'][] = 'reverseArticleTitle';
115 $wgHooks['ArticleExport'][] = 'reverseForExport';
118 Having all this code related to the title-reversion option in one
119 place means that it's easier to read and understand; you don't have to
120 do a grep-find to see where the $wgReverseTitle variable is used, say.
122 If the code is well enough isolated, it can even be excluded when not
123 used -- making for some slight savings in memory and load-up
124 performance at runtime. Admins who want to have all the reversed
127 require_once('extensions/ReverseTitle.php');
129 ...to their LocalSettings.php file; those of us who don't want or need
130 it can just leave it out.
132 The extensions don't even have to be shipped with MediaWiki; they
133 could be provided by a third-party developer or written by the admin
138 A hook is a chunk of code run at some particular event. It consists of:
140 * a function with some optional accompanying data, or
141 * an object with a method and some optional accompanying data.
143 Hooks are registered by adding them to the global $wgHooks array for a
144 given event. All the following are valid ways to define hooks:
146 $wgHooks['EventName'][] = 'someFunction'; # function, no data
147 $wgHooks['EventName'][] = array('someFunction', $someData);
148 $wgHooks['EventName'][] = array('someFunction'); # weird, but OK
150 $wgHooks['EventName'][] = $object; # object only
151 $wgHooks['EventName'][] = array($object, 'someMethod');
152 $wgHooks['EventName'][] = array($object, 'someMethod', $someData);
153 $wgHooks['EventName'][] = array($object); # weird but OK
155 When an event occurs, the function (or object method) will be called
156 with the optional data provided as well as event-specific parameters.
157 The above examples would result in the following code being executed
158 when 'EventName' happened:
161 someFunction($param1, $param2)
163 someFunction($someData, $param1, $param2)
166 $object->onEventName($param1, $param2)
168 $object->someMethod($param1, $param2)
169 # object with method and data
170 $object->someMethod($someData, $param1, $param2)
172 Note that when an object is the hook, and there's no specified method,
173 the default method called is 'onEventName'. For different events this
174 would be different: 'onArticleSave', 'onUserLogin', etc.
176 The extra data is useful if we want to use the same function or object
177 for different purposes. For example:
179 $wgHooks['ArticleSaveComplete'][] = array('ircNotify', 'TimStarling');
180 $wgHooks['ArticleSaveComplete'][] = array('ircNotify', 'brion');
182 This code would result in ircNotify being run twice when an article is
183 saved: once for 'TimStarling', and once for 'brion'.
185 Hooks can return three possible values:
187 * true: the hook has operated successfully
188 * "some string": an error occurred; processing should
189 stop and the error should be shown to the user
190 * false: the hook has successfully done the work
191 necessary and the calling function should skip
193 The last result would be for cases where the hook function replaces
194 the main functionality. For example, if you wanted to authenticate
195 users to a custom system (LDAP, another PHP program, whatever), you
198 $wgHooks['UserLogin'][] = array('ldapLogin', $ldapServer);
200 function ldapLogin($username, $password) {
205 Returning false makes less sense for events where the action is
206 complete, and will normally be ignored.
210 A calling function or method uses the wfRunHooks() function to run
211 the hooks related to a particular event, like so:
217 if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser))) {
218 # protect the article
219 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser));
224 wfRunHooks() returns true if the calling function should continue
225 processing (the hooks ran OK, or there are no hooks to run), or false
226 if it shouldn't (an error occurred, or one of the hooks handled the
227 action already). Checking the return value matters more for "before"
228 hooks than for "complete" hooks.
230 Note that hook parameters are passed in an array; this is a necessary
231 inconvenience to make it possible to pass reference values (that can
232 be changed) into the hook code. Also note that earlier versions of
233 wfRunHooks took a variable number of arguments; the array() calling
234 protocol came about after MediaWiki 1.4rc1.
236 ==Events and parameters==
238 This is a list of known events and parameters; please add to it if
239 you're going to add events to the MediaWiki code.
241 'AbortLogin': Return false to cancel account login.
242 $user: the User object being authenticated against
243 $password: the password being submitted, not yet checked for validity
244 &$retval: a LoginForm class constant to return from authenticateUserData();
245 default is LoginForm::ABORTED. Note that the client may be using
246 a machine API rather than the HTML user interface.
248 'AbortNewAccount': Return false to cancel account creation.
249 $user: the User object about to be created (read-only, incomplete)
250 $message: out parameter: error message to display on abort
252 'AddNewAccount': after a user account is created
253 $user: the User object that was created. (Parameter added in 1.7)
255 'AjaxAddScript': Called in output page just before the initialisation
256 of the javascript ajax engine. The hook is only called when ajax
257 is enabled ( $wgUseAjax = true; ).
259 'AlternateEdit': before checking if an user can edit a page and
260 before showing the edit form ( EditPage::edit() ). This is triggered
262 $EditPage : the EditPage object
264 'ArticleDelete': before an article is deleted
265 $article: the article (object) being deleted
266 $user: the user (object) deleting the article
267 $reason: the reason (string) the article is being deleted
269 'ArticleDeleteComplete': after an article is deleted
270 $article: the article that was deleted
271 $user: the user that deleted the article
272 $reason: the reason the article was deleted
274 'ArticleInsertComplete': After an article is created
275 $article: Article created
276 $user: User creating the article
278 $summary: Edit summary/comment
279 $isMinor: Whether or not the edit was marked as minor
280 $isWatch: (No longer used)
281 $section: (No longer used)
282 $flags: Flags passed to Article::doEdit()
283 $revision: New Revision of the article
285 'ArticleProtect': before an article is protected
286 $article: the article being protected
287 $user: the user doing the protection
288 $protect: boolean whether this is a protect or an unprotect
289 $reason: Reason for protect
290 $moveonly: boolean whether this is for move only or not
292 'ArticleProtectComplete': after an article is protected
293 $article: the article that was protected
294 $user: the user who did the protection
295 $protect: boolean whether it was a protect or an unprotect
296 $reason: Reason for protect
297 $moveonly: boolean whether it was for move only or not
299 'ArticleSave': before an article is saved
300 $article: the article (object) being saved
301 $user: the user (object) saving the article
302 $text: the new article text
303 $summary: the article summary (comment)
308 'ArticleSaveComplete': After an article has been updated
309 $article: Article modified
310 $user: User performing the modification
312 $summary: Edit summary/comment
313 $isMinor: Whether or not the edit was marked as minor
314 $isWatch: (No longer used)
315 $section: (No longer used)
316 $flags: Flags passed to Article::doEdit()
317 $revision: New Revision of the article
319 'ArticleSaveComplete': after an article is saved
320 $article: the article (object) saved
321 $user: the user (object) who saved the article
322 $text: the new article text
323 $summary: the article summary (comment)
328 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text, $summary, $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
330 'ArticleUndeleted': When one or more revisions of an article are restored
331 $title: Title corresponding to the article restored
332 $create: Whether or not the restoration caused the page to be created
333 (i.e. it didn't exist before)
335 'ArticleViewHeader': Before the parser cache is about to be tried for article viewing.
336 &$pcache: whether to try the parser cache or not
337 &$outputDone: whether the output for this page finished or not
339 'ArticleUpdateBeforeRedirect': After a page is updated (usually on save), before the user is redirected back to the page
340 &$article: the article
341 &$sectionanchor: The section anchor link (e.g. "#overview" )
342 &$extraq: Extra query parameters which can be added via hooked functions
344 'AuthPluginSetup': update or replace authentication plugin object ($wgAuth)
345 Gives a chance for an extension to set it programattically to a variable class.
346 &$auth: the $wgAuth object, probably a stub
348 'AutoAuthenticate': called to authenticate users on external/environmental means
349 $user: writes user object to this parameter
351 'BadImage': When checking against the bad image list
352 $name: Image name being checked
353 &$bad: Whether or not the image is "bad"
355 Change $bad and return false to override. If an image is "bad", it is not
356 rendered inline in wiki pages or galleries in category pages.
358 'BeforeGalleryFindFile': before an image is fetched for a gallery
359 &$gallery,: the gallery object
360 &$nt: the image title
361 &$time: image timestamp
363 'BeforePageDisplay': Prior to outputting a page
364 $out: OutputPage object
366 'BeforeParserFetchTemplateAndtitle': before a template is fetched by Parser
367 &$parser: Parser object
368 &$title: title of the template
369 &$skip: skip this template and link it?
370 &$id: the id of the revision being parsed
372 'BeforeParserMakeImageLinkObj': before an image is rendered by Parser
373 &$parser: Parser object
374 &$nt: the image title
375 &$skip: skip this image and link it?
376 &$time: the image timestamp
378 'BeforeParserrenderImageGallery': before an image gallery is rendered by Parser
379 &$parser: Parser object
380 &$ig: ImageGallery object
382 'BlockIp': before an IP address or user is blocked
383 $block: the Block object about to be saved
384 $user: the user _doing_ the block (not the one being blocked)
386 'BlockIpComplete': after an IP address or user is blocked
387 $block: the Block object that was saved
388 $user: the user who did the block (not the one being blocked)
390 'BookInformation': Before information output on Special:Booksources
391 $isbn: ISBN to show information for
392 $output: OutputPage object in use
394 'CategoryPageView': before viewing a categorypage in CategoryPage::view
395 $catpage: CategoryPage instance
397 'ContributionsToolLinks': Change tool links above Special:Contributions
399 $title: User page title
400 &$tools: Array of tool links
402 'CustomEditor': When invoking the page editor
403 $article: Article being edited
404 $user: User performing the edit
406 Return true to allow the normal editor to be used, or false
407 if implementing a custom editor, e.g. for a special namespace,
410 'DiffViewHeader': called before diff display
411 $diff: DifferenceEngine object that's calling
412 $oldRev: Revision object of the "old" revision (may be null/invalid)
413 $newRev: Revision object of the "new" revision
415 'EditPage::attemptSave': called before an article is
416 saved, that is before insertNewArticle() is called
417 &$editpage_Obj: the current EditPage object
419 'EditFormPreloadText': Allows population of the edit form when creating new pages
420 &$text: Text to preload with
421 &$title: Title object representing the page being created
423 'EditPage::showEditForm:fields': allows injection of form field into edit form
424 &$editor: the EditPage instance for reference
425 &$out: an OutputPage instance to write to
426 return value is ignored (should always return true)
428 'EditFilter': Perform checks on an edit
429 $editor: Edit form (see includes/EditPage.php)
430 $text: Contents of the edit box
431 $section: Section being edited
432 &$error: Error message to return
434 Return false to halt editing; you'll need to handle error messages, etc. yourself.
435 Alternatively, modifying $error and returning true will cause the contents of $error
436 to be echoed at the top of the edit form as wikitext. Return true without altering
437 $error to allow the edit to proceed.
439 'EditSectionLink': Override the return value of Linker::editSectionLink()
440 $skin: Skin rendering the UI
441 $title: Title being linked to
442 $section: Section to link to
444 $result: Result (alter this to override the generated links)
446 'EditSectionLinkForOther': Override the return value of Linker::editSectionLinkForOther()
447 $skin: Skin rendering the UI
448 $title: Title being linked to
449 $section: Section to link to
450 $hint: Anchor title/tooltip attributes
452 $result: Result (alter this to override the generated links)
454 'EmailConfirmed': When checking that the user's email address is "confirmed"
455 $user: User being checked
456 $confirmed: Whether or not the email address is confirmed
457 This runs before the other checks, such as anonymity and the real check; return
458 true to allow those checks to occur, and false if checking is done.
460 'EmailUser': before sending email from one user to another
461 $to: address of receiving user
462 $from: address of sending user
463 $subject: subject of the mail
464 $text: text of the mail
466 'EmailUserComplete': after sending email from one user to another
467 $to: address of receiving user
468 $from: address of sending user
469 $subject: subject of the mail
470 $text: text of the mail
472 'FetchChangesList': When fetching the ChangesList derivative for a particular user
473 &$user: User the list is being fetched for
474 &$skin: Skin object to be used with the list
475 &$list: List object (defaults to NULL, change it to an object instance and return
476 false override the list derivative used)
478 'FileUpload': When a file upload occurs
479 $file : Image object representing the file that was uploaded
481 'GetInternalURL': modify fully-qualified URLs used for squid cache purging
482 $title: Title object of page
483 $url: string value as output (out parameter, can modify)
484 $query: query options passed to Title::getInternalURL()
486 'GetLocalURL': modify local URLs as output into page links
487 $title: Title object of page
488 $url: string value as output (out parameter, can modify)
489 $query: query options passed to Title::getLocalURL()
491 'GetFullURL': modify fully-qualified URLs used in redirects/export/offsite data
492 $title: Title object of page
493 $url: string value as output (out parameter, can modify)
494 $query: query options passed to Title::getFullURL()
496 'ImageOpenShowImageInlineBefore': Call potential extension just before showing the image on an image page
497 $imagePage: ImagePage object ($this)
500 'InitPreferencesForm': called at the end of PreferencesForm's constructor
501 $form: the PreferencesForm
502 $request: the web request to initialized from
504 'InternalParseBeforeLinks': during Parser's internalParse method before links but
505 after noinclude/includeonly/onlyinclude and other processing.
506 &$this: Parser object
507 &$text: string containing partially parsed text
508 &$this->mStripState: Parser's internal StripState object
510 'isValidPassword': Override the result of User::isValidPassword()
511 $password: Desired password
512 &$result: Set this and return false to override the internal checks
513 $user: User the password is being validated for
515 'LinksUpdateConstructed': At the end of LinksUpdate() is contruction.
516 &$linksUpdate: the LinkUpdate object
518 'LoginAuthenticateAudit': a login attempt for a valid user account either succeeded or failed.
519 No return data is accepted; this hook is for auditing only.
520 $user: the User object being authenticated against
521 $password: the password being submitted and found wanting
522 $retval: a LoginForm class constant with authenticateUserData() return value (SUCCESS, WRONG_PASS, etc)
524 'LogPageValidTypes': action being logged. DEPRECATED: Use $wgLogTypes
525 &$type: array of strings
527 'LogPageLogName': name of the logging page(s). DEPRECATED: Use $wgLogNames
528 &$typeText: array of strings
530 'LogPageLogHeader': strings used by wfMsg as a header. DEPRECATED: Use $wgLogHeaders
531 &$headerText: array of strings
533 'LogPageActionText': strings used by wfMsg as a header. DEPRECATED: Use $wgLogActions
534 &$actionText: array of strings
536 'MarkPatrolled': before an edit is marked patrolled
537 $rcid: ID of the revision to be marked patrolled
538 $user: the user (object) marking the revision as patrolled
539 $wcOnlySysopsCanPatrol: config setting indicating whether the user
540 needs to be a sysop in order to mark an edit patrolled
542 'MarkPatrolledComplete': after an edit is marked patrolled
543 $rcid: ID of the revision marked as patrolled
544 $user: user (object) who marked the edit patrolled
545 $wcOnlySysopsCanPatrol: config setting indicating whether the user
546 must be a sysop to patrol the edit
548 'MathAfterTexvc': after texvc is executed when rendering mathematics
549 $mathRenderer: instance of MathRenderer
550 $errmsg: error message, in HTML (string). Nonempty indicates failure
551 of rendering the formula
553 'OutputPageBeforeHTML': a page has been processed by the parser and
554 the resulting HTML is about to be displayed.
555 $parserOutput: the parserOutput (object) that corresponds to the page
556 $text: the text that will be displayed, in HTML (string)
558 'PageHistoryBeforeList': When a history page list is about to be constructed.
559 $article: the article that the history is loading for
561 'PageHistoryLineEnding' : right before the end <li> is added to a history line
562 $row: the revision row for this line
563 $s: the string representing this parsed line
565 'PageRenderingHash': alter the parser cache option hash key
566 A parser extension which depends on user options should install
567 this hook and append its values to the key.
568 $hash: reference to a hash key string which can be modified
570 'ParserTestTables': alter the list of tables to duplicate when parser tests
571 are run. Use when page save hooks require the presence of custom tables
572 to ensure that tests continue to run properly.
573 &$tables: array of table names
575 'PersonalUrls': Alter the user-specific navigation links (e.g. "my page,
576 my talk page, my contributions" etc).
578 &$personal_urls: Array of link specifiers (see SkinTemplate.php)
579 &$title: Title object representing the current page
581 'PingLimiter': Allows extensions to override the results of User::pingLimiter()
582 &$user : User performing the action
583 $action : Action being performed
584 &$result : Whether or not the action should be prevented
585 Change $result and return false to give a definitive answer, otherwise
586 the built-in rate limiting checks are used, if enabled.
588 'PreferencesUserInformationPanel': Add HTML bits to user information list in preferences form
589 $form : PreferencesForm object
590 &$html : HTML to append to
592 'RawPageViewBeforeOutput': Right before the text is blown out in action=raw
593 &$obj: RawPage object
594 &$text: The text that's going to be the output
596 'RenderPreferencesForm': called at the end of PreferencesForm::mainPrefsForm
597 $form: the PreferencesForm
598 $out: output page to render to, probably $wgOut
600 'ResetPreferences': called at the end of PreferencesForm::resetPrefs
601 $form: the PreferencesForm
602 $user: the User object to load preferences from
604 'SavePreferences': called at the end of PreferencesForm::savePreferences;
605 returning false prevents the preferences from being saved.
606 $form: the PreferencesForm
607 $user: the User object to save preferences to
608 $message: change this to set an error message (ignored if the hook does notreturn fals)
610 'SearchUpdate': Prior to search update completion
612 $namespace : Page namespace
614 $text : Current text being indexed
616 'ShowRawCssJs': Customise the output of raw CSS and JavaScript in page views
617 $text: Text being shown
618 $title: Title of the custom script/stylesheet page
619 $output: Current OutputPage object
621 'SiteNoticeBefore': Before the sitenotice/anonnotice is composed
622 &$siteNotice: HTML returned as the sitenotice
623 Return true to allow the normal method of notice selection/rendering to work,
624 or change the value of $siteNotice and return false to alter it.
626 'SiteNoticeAfter': After the sitenotice/anonnotice is composed
627 &$siteNotice: HTML sitenotice
628 Alter the contents of $siteNotice to add to/alter the sitenotice/anonnotice.
630 'SkinAfterBottomScripts': At the end of Skin::bottomScripts()
632 &$text: bottomScripts Text
633 Append to $text to add additional text/scripts after the stock bottom scripts.
635 'SkinTemplateContentActions': Alter the "content action" links in SkinTemplates
636 &$content_actions: Content actions
637 [See http://svn.wikimedia.org/viewvc/mediawiki/trunk/extensions/examples/Content_action.php
640 'SkinTemplateOutputPageBeforeExec': Before SkinTemplate::outputPage() starts page output
641 &$sktemplate: SkinTemplate object
642 &$tpl: Template engine object
644 'SpecialContributionsBeforeMainOutput': Before the form on Special:Contributions
647 'TitleMoveComplete': after moving an article (title)
650 $user: user who did the move
651 $pageid: database ID of the page that's been moved
652 $redirid: database ID of the created redirect
654 'UnknownAction': An unknown "action" has occured (useful for defining
657 $article: article "acted on"
659 'UnwatchArticle': before a watch is removed from an article
661 $article: article object to be removed
663 'UnwatchArticle': after a watch is removed from an article
664 $user: user that was watching
665 $article: article object removed
667 'UnwatchArticleComplete': after a watch is removed from an article
668 $user: user that watched
669 $article: article object that was watched
671 'UploadForm:initial': before the upload form is generated
672 $form: UploadForm object
673 You might set the member-variables $uploadFormTextTop and
674 $uploadFormTextAfterSummary to inject text (HTML) either before
675 or after the editform.
677 'UploadForm:BeforeProcessing': at the beginning of processUpload()
678 $form: UploadForm object
679 Lets you poke at member variables like $mUploadDescription before the
682 'UploadVerification': additional chances to reject an uploaded file
683 string $saveName: destination file name
684 string $tempName: filesystem path to the temporary file for checks
685 string &$error: output: HTML error to show if upload canceled by returning false
687 'UploadComplete': Upon completion of a file upload
688 $image: Image object representing the file that was uploaded
690 'UserCan': To interrupt/advise the "user can do X to Y article" check
691 $title: Title object being checked against
692 $user : Current user object
693 $action: Action being checked
694 $result: Pointer to result returned if hook returns false. If null is returned,
695 UserCan checks are continued by internal code
697 'UserCreateForm': change to manipulate the login form
698 $template: SimpleTemplate instance for the form
700 'UserLoginComplete': after a user has logged in
701 $user: the user object that was created on login
703 'UserLoginForm': change to manipulate the login form
704 $template: SimpleTemplate instance for the form
706 'UserLogout': before a user logs out
707 $user: the user object that is about to be logged out
709 'UserLogoutComplete': after a user has logged out
710 $user: the user object _after_ logout (won't have name, ID, etc.)
712 'UserRights': After a user's group memberships are changed
713 $user : User object that was changed
714 $add : Array of strings corresponding to groups added
715 $remove: Array of strings corresponding to groups removed
717 'UserGetImplicitGroups': Called in User::getImplicitGroups()
718 &$groups: List of implicit (automatically-assigned) groups
720 'UserGetRights': Called in User::getRights()
721 $user: User to get rights for
722 &$rights: Current rights
724 'UserEffectiveGroups': Called in User::getEffectiveGroups()
725 $user: User to get groups for
726 &$groups: Current effective groups
728 'WatchArticle': before a watch is added to an article
729 $user: user that will watch
730 $article: article object to be watched
732 'WatchArticleComplete': after a watch is added to an article
733 $user: user that watched
734 $article: article object watched
737 More hooks might be available but undocumented, you can execute
738 ./maintenance/findhooks.php to find hidden one.