Currently only data attributes reserved to MediaWiki are allowed
(see Sanitizer::isReservedDataAttribute).
+'DeleteUnknownPreferences': Called by the cleanupPreferences.php maintenance script to build a WHERE clause with which
+to delete preferences that are not known about. This hook is used by extensions that have dynamically-named preferences
+that should not be deleted in the usual cleanup process. For example, the Gadgets extension creates preferences prefixed
+with 'gadget-', and so anything with that prefix is excluded from the deletion.
+&where: An array that will be passed as the $cond parameter to IDatabase::select() to determine what will be deleted
+ from the user_properties table.
+$db: The IDatabase object, useful for accessing $db->buildLike() etc.
+
'DifferenceEngineAfterLoadNewText': called in DifferenceEngine::loadNewText()
after the new revision's content has been loaded into the class member variable
$differenceEngine->mNewContent but before returning true from this function.
'GetIP': modify the ip of the current user (called only once).
&$ip: string holding the ip as determined so far
+'GetLangPreferredVariant': Called in LanguageConverter#getPreferredVariant() to
+ allow fetching the language variant code from cookies or other such
+ alternative storage.
+&$req: language variant from the URL (string) or boolean false if no variant
+ was specified in the URL; the value of this variable comes from
+ LanguageConverter#getURLVariant()
+
'GetLinkColours': modify the CSS class of an array of page links.
$linkcolour_ids: array of prefixed DB keys of the pages linked to,
indexed by page_id.
$page: ImagePage object
&$toc: Array of <li> strings
-'ImgAuthBeforeStream': executed before file is streamed to user, but only when
+'ImgAuthBeforeStream': Executed before file is streamed to user, but only when
using img_auth.php.
&$title: the Title object of the file as it would appear for the upload page
&$path: the original file and path name when img_auth was invoked by the web
$result[2 through n]=Parameters passed to body text message. Please note the
header message cannot receive/use parameters.
+'ImgAuthModifyHeaders': Executed just before a file is streamed to a user via
+img_auth.php, allowing headers to be modified beforehand.
+$title: LinkTarget object
+&$headers: HTTP headers ( name => value, names are case insensitive ).
+ Two headers get special handling: If-Modified-Since (value must be
+ a valid HTTP date) and Range (must be of the form "bytes=(\d*-\d*)")
+ will be honored when streaming the file.
+
'ImportHandleLogItemXMLTag': When parsing a XML tag in a log item.
Return false to stop further processing of the tag
$reader: XMLReader object
$rev: the new revision
$baseID: the revision ID this was based off, if any
$user: the editing user
+&$tags: tags to apply to the edit and recent change
'OldChangesListRecentChangesLine': Customize entire recent changes line, or
return false to omit the line from RecentChanges and Watchlist special pages.
or request state must be added through MakeGlobalVariablesScript instead.
&$vars: array( variable name => value )
-'ResourceLoaderGetLessVars': DEPRECATED! Called in ResourceLoader::getLessVars
-to add global LESS variables. Loaded after $wgResourceLoaderLESSVars is added.
-Global LESS variables are deprecated. Use ResourceLoaderModule::getLessVars()
-instead to expose variables only in modules that need them.
-&$lessVars: array of variables already added
-
'ResourceLoaderJqueryMsgModuleMagicWords': Called in
ResourceLoaderJqueryMsgModule to allow adding magic words for jQueryMsg.
The value should be a string, and they can depend only on the