1= MediaWiki 1.37 =
2
3== MediaWiki 1.37.1 ==
4
5This is a security and maintenance release of the MediaWiki 1.37 branch.
6
7=== Changes since MediaWiki 1.37.0 ===
8* (T296112) Allow inserting new sections named '0'.
9* Fix path for ZhConversion.php.
10* nukeNS: don't run purgeRedundantText() after every change.
11* (T286779, T297031) installer: Fix Postgres mistakes in using changeField
12  method.
13* (T225888) RollbackAction: fix missing pagetitle.
14* (T297322, CVE-2021-44858, CVE-2021-44857) SECURITY: Fix permissions checks in
15  undo actions.
16* (T297574, CVE-2021-45038) SECURITY: Fix permissions check in action=rollback.
17* (T34716, T297416) SECURITY: Require 'read' right for most actions.
18* (T271037, CVE-2021-44856) SECURITY: Fix use of EditFilterMergedContent hook when
19  changing content model.
20
21== MediaWiki 1.37.0 ==
22
23=== Changes since MediaWiki 1.37.0-rc.2 ===
24* Remove justinrainbow/json-schema from vendor.
25* Updated pear/mail_mime from 1.10.9 to 1.10.11.
26* Update deprecated Guzzle Psr7 function calls.
27* (T281972) UserIdentityValue: Correct @since tags.
28* Updated wikimedia/parsoid from v0.14.0-a19 to v0.14.0.
29* Localisation updates.
30* Tweak error message for missing composer dependencies.
31
32== MediaWiki 1.37.0-rc.2 ==
33
34=== Changes since MediaWiki 1.37.0-rc.1 ===
35* (T295173) Re-add wikimedia/normalized-exception to vendor.
36* Remove wikimedia/testing-access-wrapper, psr/simple-cache, psr/http-factory
37  from vendor.
38* (T295191) ApiQuerySiteinfo: Fix "rightsinfo"/"url" when $wgRightsPage is set.
39* (T212428) Allow populateContentTables to continue when there are bad blobs.
40
41== MediaWiki 1.37.0-rc.1 ==
42
43=== Changes since MediaWiki 1.37.0-rc.0 ===
44* (T294043) checkStorage: pass no parameters to WikiRevision::getContent().
45* (T292763, CVE-2021-44856) SECURITY: Do not cache private wiki completion results.
46* (T293783) ApiQueryImageInfo: don't show empty comments as deleted.
47* (T294316) Revert "Mark ApiClientLogin/ApiLogin as requiring write mode".
48* (T294796) JobQueueRedis: Replace deprecated zSize with zCard.
49* Remove duplicate settings from DefaultSettings.
50* (T278037) NoLocalSettings: Pass an EmptyBagOStuff to TemplateParser.
51
52== MediaWiki 1.37.0-rc.0 ==
53
54== Upgrading notes for 1.37 ==
55Don't forget to always back up your database before upgrading!
56
57See the file UPGRADE for more detailed per-version upgrade instructions from the
58oldest supported upgrading version, MediaWiki 1.27.
59
60Some specific notes for MediaWiki 1.37 upgrades are below:
61* (T280806) Deprecated methods of fetching API tokens have been removed. This
62  may cause older bots and scripts to fail. Most queries are trivially
63  updateable to using new methods. See the Action API changes section below
64  for more information.
65
66For notes on 1.36.x and older releases, see HISTORY.
67
68=== Configuration changes for system administrators in 1.37 ===
69* (T242768) The PasswordCannotMatchUsername password policy has been removed,
70  please use PasswordCannotBeSubstringInUsername instead. If you have not
71  customised your password policies, there will be nothing to do here.
72
73==== New configuration ====
74* $wgBrowserFormatDetection - This setting allows the enabling or disabling
75  of automatic detection of possible phone numbers in a webpage in iOS Safari.
76* $wgParserEnableLegacyMediaDOM - This setting defaults to true, and enables
77  the legacy media HTML structure in the output from the Parser.  The
78  alternative modern HTML structure for media is described at
79  https://www.mediawiki.org/wiki/Parsing/Media_structure
80  In a future release of MediaWiki this option will default to false,
81  so it's a good idea to test this setting on your wiki early and report
82  any issues.
83
84==== Changed configuration ====
85* $wgContentHandlerTextFallback - This migration setting, which defines how to
86  react if a plain text version of a non-text Content object is requested using
87  ContentHandler::getContentText(), is deprecated.
88* $wgActions – This setting lets sysadmins over-ride which actions can be used.
89  It has been re-worked to support injecting dependencies into Action sub-
90  classes as part of wider work on dependency injection. Previously, $wgActions
91  was an array where the keys were the names of actions, and the values had the
92  following impacts (for a given key 'Foo'):
93  - `true`: use the class 'FooAction' unless for a specific page
94    WikiPage::getActionOverrides() wants to override that action
95  - a string: use the class with that name, and do not allow over-riding on a
96    per-page basis
97  - `false`: the action is disabled
98  - a callable: use the Action instance returned by invoking that callback, and
99    do not allow overriding on a per-page basis
100  - an object: use that specific Action instance, and do not allow overr-iding
101    on a per-page basis.
102  As part of T253078, values can now be arrays that are not callables, which are
103  treated as ObjectFactory specs, allowing for services to be injected.
104  Additionally, the distinction between values that allow per-page overrides and
105  those that do not was removed - all actions can now be overridden on a per-
106  page basis using WikiPage::getActionOverrides().
107* $wgShellboxUrl – This setting, new in 1.36 to configure the novel Shellbox
108  encapsulation system, is now deprecated; use $wgShellboxUrls as a mapping of
109  service => URL instead.
110* $wgIncludejQueryMigrate – This setting, introduced in 1.29 to on whether to
111  provide a migration layer for jQuery, has now switched its default value from
112  true to false. This may break gadgets that depended on methods that were
113  removed in jQuery 3 in 2017. See T280944 for more information.
114* A number of settings have been renamed. The former configuration variable
115  names are deprecated, but will be used as the fall back if they are still set,
116  and remain temporarily available for extensions which might try to read them:
117  - $wgFileBlacklist is now $wgProhibitedFileExtensions
118  - $wgMimeTypeBlacklist is now $wgMimeTypeExclusions
119  - $wgEnableUserEmailBlacklist is now $wgEnableUserEmailMuteList
120  - $wgShortPagesNamespaceBlacklist is now $wgShortPagesNamespaceExclusions
121* $wgMimeTypeExclusions - As well as being renamed, this configuration array now
122  also prohibits the RFC 4329 form of JavaScript, 'application/javascript', as
123  well as previous MIME types.
124* $wgFragmentMode - This setting, which determines the encoding of section IDs,
125  has now switched its default value from legacy-first to html5-first: both the
126  HTML5 anchor and the legacy percent-encoding-style anchor will still be
127  generated for section titles, but references to them will use the HTML5
128  version, resulting in human-readable fragments.
129
130==== Removed configuration ====
131* $wgLegacyJavaScriptGlobals, deprecated in 1.36.
132* (T274695) $wgAjaxEditStash, deprecated in 1.36.
133* $wgShowDBErrorBacktrace, deprecated and non-functional since 1.32.
134* $wgShowSQLErrors, deprecated and non-functional since 1.32.
135* $wgLangObjCacheSize, without deprecation; the LanguageFactory service now
136  always retains at most 10 objects in its LRU-cache.
137* $wgDjvuToXML, without deprecation; the tool it enables is obsolete and
138  abandoned upstream. Use $wgDjvuDump to use that tool instead.
139
140=== New user-facing features in 1.37 ===
141* (T161934) MediaWiki now supports JPEG2000 files, to a limited extent.
142
143=== External library changes in 1.37 ===
144
145==== New external libraries ====
146* Added symfony/polyfill-php80 1.23.1.
147* Added whatwg-fetch 3.6.2.
148* Added wikimedia/normalized-exception 1.0.1.
149
150==== Changed external libraries ====
151* Updated OOjs from v5.0.0 to v6.0.0
152* Updated OOjs-Router from v0.2.0 to v0.3.0
153* Updated OOUI from v0.41.3 to v0.42.0
154* Updated WVUI from v0.1.0 to v0.3.0
155* Updated cssjanus/cssjanus from v1.3.0 to v2.1.0.
156* Updated pear/mail_mime from 1.10.9 to 1.10.11.
157* Updated psr/container from v1.0.0 to v1.1.1.
158* Updated wikimedia/minify from v2.2.2 to v2.2.4.
159* Updated wikimedia/object-factory from v3.0.0 to v3.0.2.
160* Updated wikimedia/parsoid from v0.13.1 to v0.14.0.
161* Updated wikimedia/relpath from v2.1.1 to v3.0.0.
162* Updated wikimedia/remex-html from v2.3.1 to v2.3.2.
163* Updated wikimedia/shellbox from v1.0.4 to v2.0.0.
164* Updated wikimedia/wait-condition-loop from v2.0.1 to v2.0.2.
165* Updated zordius/lightncandy from v1.2.5 to v1.2.6.
166
167===== Changed development-only external libraries =====
168* Updated qunit from 2.10.0 to 2.16.0.
169
170==== Removed external libraries ====
171* The pimple/pimple development-only library has been removed.
172
173=== Action API changes in 1.37 ===
174* (T280806) The API methods for fetching tokens which were deprecated in
175  MediaWiki 1.24 have been removed. action=query&meta=tokens&type= should be
176  used instead. Please note some token types no longer exist, and you should
177  just use type=csrf for those instead.
178  - action=query&prop=info&intoken ->
179      action=query&meta=tokens&type=csrf
180  - action=tokens&type= ->
181      action=query&meta=tokens&type=
182  - action=query&list=recentchanges&rctoken ->
183      action=query&meta=tokens&type=csrf
184  - action=query&prop=revisions&rvtoken=rollback ->
185      action=query&meta=tokens&type=rollback
186  - action=query&meta=userinfo&uiprop=preferencestoken ->
187      action=query&meta=tokens&type=csrf
188  - action=query&list=users&ustoken=userrights ->
189      action=query&meta=tokens&type=userrights
190
191=== Languages updated in 1.37 ===
192MediaWiki supports over 350 languages. Many localisations are updated regularly.
193Below only new and removed languages are listed, as well as changes to languages
194because of Phabricator reports.
195
196* (T280435) LRM and RLM characters were removed from names of languages with
197  parentheses in Names.php
198* (T283422) Add namespace name translations and change the autonym of
199  the Kinyarwanda language to "Ikinyarwanda".
200* (T283423) Change the autonym of the Lombard language from "lumbaart"
201  to "lombard".
202* (T279619) Added language support for Dagbani (dag).
203* (T282085) Added language support for Malay in Arabic (Jawi) script (ms-arab).
204* (T283053) Added language support for Ojibwe (ojb).
205* (T283480) Added language support for Wallisian (wls, Fakaʻuvea).
206* (T284002) Added language support for Paiwan (pwn).
207* (T284044) Added language support for Carpathian Romani (rmc).
208* (T286460) Added language support for Gun (guw, Gungbe).
209* (T287345) Added language support for Baoulé (bci).
210* (T290126) Added language support for Kildin Sami (sjd).
211* (T290408) Added language support for Pite Sami (sje).
212* (T25216) Started the renaming of the language code for Norman from nrm to
213  nrf.
214
215=== Breaking changes in 1.37 ===
216* The Revision class, emitting deprecation warnings since 1.35, was removed
217  entirely. As part of this, the following hooks that included a Revision object
218  were removed:
219    - ArticleRevisionUndeleted - use RevisionUndeleted
220    - ArticleRollbackComplete - use RollbackComplete
221    - DiffRevisionTools - use DiffTools
222    - DiffViewHeader - use DifferenceEngineViewHeader
223    - HistoryRevisionTools - use HistoryTools
224    - NewRevisionFromEditComplete - use RevisionFromEditComplete
225    - PageContentInsertComplete - use PageSaveComplete
226    - PageContentSaveComplete - use PageSaveComplete
227    - ParserFetchTemplate - use BeforeParserFetchTemplateRevisionRecord
228    - RevisionInsertComplete - use RevisionRecordInserted
229    - TitleMoveComplete - use PageMoveComplete
230    - TitleMoveCompleting - use PageMoveCompleting
231    - UndeleteShowRevision - no replacement
232    - UserRetrieveNewTalks - no replacement
233  … the following methods and variables have been removed:
234    - Article::$mRevision
235    - Article::getRevisionFetched()
236    - ContribsPager::tryToCreateValidRevision()
237    - EditPage::$mBaseRevision
238    - EditPage::getBaseRevision()
239    - LinksUpdate::getRevision()
240    - LinksUpdate::setRevision()
241    - PageArchive::getArchivedRevision()
242    - PageArchive::getPreviousRevision()
243    - PageArchive::getRevision()
244    - Parser::$mRevisionObject
245    - Parser::fetchCurrentRevisionOfTitle()
246    - Parser::getRevisionObject()
247    - Parser::statelessFetchRevision()
248    - ParserOptions::getCurrentRevisionCallback()
249    - ParserOptions::setCurrentRevisionCallback()
250    - Title::countAuthorsBetween()
251    - Title::getFirstRevision()
252    - User::getNewMessageLinks()
253    - User::getNewMessageRevisionId()
254    - User::setNewtalk()
255    - WikiPage::getOldestRevision()
256    - WikiPage::getRevision()
257    - WikiPage::getUndoContent()
258    - WikiPage::updateIfNewerOn()
259  … and the following methods no longer accept Revision objects as parameters:
260    - CategoryMembershipChange::__construct()
261    - ContentHandler::getUndoContent()
262    - DerivedPageDataUpdater::prepareUpdate()
263    - DifferenceEngine::getRevisionHeader()
264    - Linker::buildRollbackLink()
265    - Linker::generateRollback()
266    - Linker::getRevDeleteLink()
267    - Linker::getRollbackEditCount()
268    - Linker::revComment()
269    - Linker::revUserLink()
270    - Linker::revUserTools()
271    - WikiPage::doDeleteUpdates()
272    - WikiPage::doEditUpdates()
273    - WikiPage::hasDifferencesOutsideMainSlot()
274    - WikiPage::onArticleEdit()
275    - WikiPage::prepareContentForEdit()
276    - WikiPage::updateRevisionOn()
277  The following methods return arrays that formerly included a 'revision'
278  key that would emit deprecation warnings when accessed and return a
279  Revision object. The Revision object has been removed from the arrays,
280  and the 'revision-record' key should be used to get the relevant
281  RevisionRecord instead:
282    - PageUpdater::doCreate()
283    - PageUpdater::doModify()
284    - Parser::statelessFetchTemplate()
285    - WikiPage::doEditContent()
286  Finally, the ParserOptions `templateCallback` option is a callback that is
287  called in Parser::fetchTemplateAndTitle() and should return an array - the
288  'revision' key to that array used to be a Revision object and was used if
289  no 'revision-record' was returned - is now ignored.
290* Previously, the classes RevisionTestModifyableContent and
291  RevisionTestModifyableContentHandler were loaded for use in tests, but were
292  only used within the tests for the since-removed Revision class. This content
293  and content handler class were removed without deprecation.
294* WANObjectCache::HOLDOFF_NONE, deprecated since 1.35, was removed. Use
295  WANObjectCache::HOLDOFF_TTL_NONE instead.
296* Calling ResourceLoader::makeVersionQuery() without $modules parameter,
297  deprecated since MediaWiki 1.34, is no longer supported.
298* LocalFile::recordUpload2(), deprecated since 1.35, was removed.
299* The following methods and fields in the Language class, deprecated since 1.35,
300  have been removed:
301   - ::classFromCode()
302   - ::clearCaches()
303   - ::convertTitle()
304   - ::findVariantLink()
305   - ::$mConverter
306   - ::updateConversionTable()
307* The following methods in the Parser class have been removed after having been
308  deprecated in 1.35:
309   - fetchTemplate()
310   - Title()
311* (T273354) When an edit is prevented by an 'EditFilterMergedContent' hook
312  handler without changing the status, the edit form will now be displayed.
313* User::clearNotification() which had been deprecated in 1.35 has been removed.
314  Use WatchlistManager::clearTitleUserNotification() instead.
315* User::getNewtalk() which had been deprecated in 1.35 has been removed. Use
316  TalkPageNotificationManager::userHasNewMessages() instead.
317* The Autopromote class, deprecated since 1.35, was removed. Use
318  UserGroupManager instead.
319* The CachedAction, SpecialCachedPage, CacheHelper, and ICacheHelper classes,
320  all emitting deprecation warnings since 1.36, have been removed.
321* The hooks BeforeHttpsRedirect, CanIPUseHTTPS and UserRequiresHTTPS, deprecated
322  in 1.35, were removed.
323* The TitleArrayFromResult hook, deprecated in 1.36, was removed.
324* The deprecated "es6-promise" alias ResourceLoader module has been removed. Use
325  the "es6-polyfills" module directly intead.
326* The deprecated "mediawiki.legacy.protect" ResourceLoader module, deprecated
327  since 1.36, has been removed. Use "mediawiki.action.protect" instead.
328* The JavaScript alias $j for references to jQuery, deprecated since 1.23, has
329  been removed. Use $ instead.
330* The AuthenticationProvider interface and the SessionProvider class no longer
331  extend the PSR LoggerAwareInterface concept, so they can't be typehinted as
332  LoggerAwareInterface.
333* User::getGrantName(), emitting deprecation warnings since 1.36, has been
334  removed. Use MWGrants::grantName() instead.
335* The following ApiBase methods, deprecated since 1.35, have been removed:
336  - ApiBase::explodeMultiValue
337  - ApiBase::parseMultiValue
338  - ApiBase::validateLimit
339  - ApiBase::validateTimestamp
340* The User::idCacheByName() public static field was removed without deprecation.
341  Instead of using it, get a UserIdentity by name from the UserIdentityLookup
342  service.
343* IDatabase::upsert() and IDatabase::replace() now only accept a single unique
344  key. Previously, a warning was issued if there were multiple unique keys
345  provided.
346* The MediaWiki:Autoblock_whitelist block exemption control was moved in 1.36 to
347  MediaWiki:Block-autoblock-exemptionlist. The backward-compatibility of reading
348  the old MediaWiki:Autoblock_whitelist page has now been dropped.
349* The following overridable methods in File hierarchy have changed signatures:
350  - File::deleteFile() - now accepts UserIdentity instead of User
351  - File::getDescription() - now accepts Authority instead of User
352  - File::userCan() - now accepts Authority instead of User
353  - LocalFile::deleteOldFile() - now accepts UserIdentity instead of User
354* The following global methods, each deprecated since 1.36, have been removed:
355  - wfAppendToArrayIfNotDefault()
356  - wfAcceptToPrefs()
357  - wfConfiguredReadOnlyReason()
358  - wfDebugMem()
359  - wfGetPrecompiledData()
360  - wfNegotiateType()
361* The following deprecated methods of the Title class have been removed:
362  - ::nameOf(), deprecated in 1.36
363  - ::getPreviousRevisionID(), deprecated in 1.34
364  - ::getNextRevisionID(), deprecated in 1.34
365  - ::getEarliestRevTime(), deprecated in 1.35
366* UploadBase::stashFile(), deprecated since 1.28, was removed.
367* wfGetRusage(), deprecated since 1.35, has been removed.
368* The following CLI options were removed from tests/phpunit.php:
369    - use-filebackend
370    - use-jobqueue
371    - use-bagostuff
372  The following options (inherited from Maintenance) were also removed:
373    - conf
374    - dbuser
375    - dbpass
376    - dbdefaultgroup
377    - globals
378    - memory-limit
379    - profiler
380    - server
381  The following options were changed to environment variables:
382    - wiki => PHPUNIT_WIKI
383    - use-normal-tables => PHPUNIT_USE_NORMAL_TABLES
384    - use-filebackend => PHPUNIT_USE_FILEBACKEND
385    - use-bagostuff => PHPUNIT_USE_BAGOSTUFF
386    - use-jobqueue => PHPUNIT_USE_JOBQUEUE
387  This is so that we can use the default PHPUnit entry point (T90875).
388* The PHPUNIT_REUSE_DB / --reuse-db option was removed from the phpunit.php
389  runner. It had been broken for at least three years already. The original use
390  case was speeding up tests on Oracle, but Oracle support was dropped several
391  releases ago.
392* The MediaWikiPHPUnitTest__endTestHook and MediaWikiPHPUnitTest__startTestHook
393  PHPUnit hooks were removed. MediaWikiHooksPHPUnitExtension was also removed.
394* EntryPoint::getTextFormatters() was made private without a deprecation period;
395  it had no known external callers.
396* DatabaseBlock::chooseBlock(), deprecated since 1.35, was removed.
397* SpecialPageFactory::getRestrictedPages(), deprecated since 1.36, was removed.
398* SpecialBlock::validateTarget(), deprecated since 1.36, was removed.
399* The PatchFileLocation trait was removed without deprecation.
400* ActorMigrationBase::getExistingActorId() and ::getNewActorId(), emitting
401  deprecation warnings since 1.36, were removed.
402* Hook handlers implementing the MediaWikiServicesHook hook are now prohibited
403  from having services injected. This is because by definition, this hook runs
404  before the service container is fully initialized.
405* The protected property LocalFile::$metadata was removed without deprecation.
406* WatchedItem::getUser(), emitting deprecation warnings since 1.36, has been
407  removed.
408* AuthManager::singleton(), emitting deprecation warnings since 1.36, has been
409  removed.
410* The AugmentPageProps class was removed without deprecation. It had no known
411  uses.
412* Html::infobox(), deprecated since 1.36, was removed.
413* ParserOptions::__construct() now requires that the first parameter is a
414  UserIdentity object - passing `null` used to fallback to the global
415  $wgUser but was deprecated since 1.36.
416* ParserOptions::newCanonical() no longer supports the first parameter being
417  null (or omitted entirely), which would fallback to the global $wgUser but
418  was deprecated since 1.35.
419* The SkinTemplatePreventOtherActiveTabs hook, deprecated in 1.35, was removed
420  entirely.
421* The SkinTemplateTabAction hook, deprecated in 1.35, was removed entirely.
422* The SkinTemplateBuildNavUrlsNav_urlsAfterPermalink hook, deprecated in 1.35,
423  was removed entirely.
424* The SkinTemplateToolboxEndHook, deprecated in 1.35, was removed entirely.
425* The following methods of RevisionStore class, formerly emitting deprecation
426  warnings, were removed:
427  - ::newMutableRevisionFromArray()
428  - ::loadRevisionFromPageId()
429  - ::loadRevisionFromTitle()
430  - ::loadRevisionFromTimestamp()
431  - ::listRevisionSizes()
432* LogEntry::getPerformer(), deprecated since 1.36, was removed along with
433  methods in sub-classes: DatabaseLogEntry, ManualLogEntry, RCDatabaseLogEntry.
434* Skin::getRelevantUser() now returns an instance of UserIdentity, and not
435  necessarily a User object. There is no known usages in MediaWiki ecosystem
436  that were not satisfied with UserIdentity.
437* Direct construction of MergeHistory class, deprecated since 1.35, is no longer
438  supported. Use MergeHistoryFactory instead. MergeHistory::checkPermissions,
439  deprecated since 1.36, was removed.
440* Skin::generateDebugHTML(), deprecated since 1.35, was removed. Call
441  MWDebug::getHTMLDebugLog() directly.
442* The ApiTestCase class no longer interacts with the global $wgUser.
443  Previously, the global variable was set at the start of each test, and in
444  ApiTestCase::doApiRequest() if a performer was specified $wgUser was
445  updated to match, and if no performer was specified $wgUser was used
446  instead. Now, $wgUser is not updated, and if no performer is specified
447  the reusable TestUser object for the sysop is relied on. Extensions
448  or skins that rely on the global $wgUser variable (which has been
449  deprecated since 1.35) should instead retrieve the acting user from the
450  relevant context source.
451* SkinTemplate::makeArticleUrlDetails(), deprecated since 1.35, was removed.
452* Skin::makeNSUrl(), deprecated since 1.35, was removed.
453* Skin::getRevisionId(), deprecated since 1.34, was removed. Use
454  OutputPage::getRevisionId() instead.
455* Skin::isRevisionCurrent(), deprecated since 1.34, was removed. Use
456  OutputPage::isRevisionCurrent() instead.
457* AbstractBlock::parseTarget(), deprecated since 1.36, was removed.
458* The ArticleEditUpdates hook, deprecated since 1.35, was removed.
459* The `@stable to extend` class CentralIdLookup has following changes:
460  - The protected ::checkAudience() method now returns an Authority instead of a
461    User instance.
462  - A number of its `@stable to override` methods now accept an Authority
463    instead of a User instance as the $audience parameter.
464  - A number of methods now accept a UserIdentity instead of their User
465    parameter.
466  - The ::localUserFromCentralId() method now returns UserIdentity and not
467    necessarily a User object.
468  All extensions that extend this class or use this method were updated to be
469  ready to the new behavior.
470* WatchedItemStoreInterface::enqueueWatchlistExpiryJob(), deprecated since 1.36,
471  was removed.
472* ResultWrapper is now abstract. It cannot be directly constructed (T286694).
473* The SecondaryDataUpdates hook, deprecated in 1.32, was removed entirely.
474* Content::getDeletionUpdates(), was removed. Use
475  ContentHandler::getDeletionUpdates() instead.
476* Content::getSecondaryDataUpdates(), was removed. Use
477  ContentHandler::getSecondaryDataUpdates() instead.
478* wfDiff(), deprecated since 1.25, has been removed.
479* Language::$mLangObjCache, deprecated since 1.35, was removed.
480* Language::$transformData, deprecated since 1.35, was removed.
481* Language::transformUsingPairFile() was marked @internal. Its deprecated
482  parameters are no longer supported.
483* SpecialMute::getTarget(), unused outside of the SpecialMute class, was
484  made private.
485* The Skin::setupSkinUserCss() method, deprecated in 1.32, was removed. Please
486  use skin registration instead.
487* The ResourceLoaderSkinModule `legacy`, `content` and `content-thumbnails`
488  features were deprecated. Skins should instead select from the features
489  listed on [[mw:Manual:ResourceLoaderSkinModule]].
490* ParserCache::getKey() and ::getEtag(), deprecated since 1.36, were removed.
491* The BaseTemplateToolbox hook, deprecated since 1.35, was removed.
492* Previously a capitalize-all-nouns class was added to the body element of
493  languages where nouns must be capitalized. This class is no longer added to
494  the body tag and must be provided by skins.
495* The SkinTemplateOutputPageBeforeExec hook, deprecated since 1.35, was removed.
496* Calling Message::toString() without a parameter, which triggered deprecation
497  warnings since 1.36, is no longer supported. You can instead use the explicit
498  formatting methods directly, such as Message::text() and Message::escaped().
499* Article::getContentObject(), deprecated since 1.32, was removed.
500* Article::delete(), Article::confirmDelete() and ImagePage::delete() were
501  removed. The logic responsible for building the form is being
502  moved to DeleteAction, while the actual deletion logic will be moved to a
503  separate service.
504* WikiImporter::debugRevisionHandler(), unused and for debug only, was removed.
505* Content::preloadTransform() now emits deprecation warnings. Instead, please
506  use ContentTransformer::preloadTransform(). Extensions defining a content
507  model should override ContentHandler::preloadTransform().
508* Content::preSaveTransform() now emits deprecation warnings. Instead, please
509  use ContentTransformer::preSaveTransform() instead. Extensions defining
510  a content model should override ContentHandler::preSaveTransform().
511* Constructing WikiPage objects from Title instances that cannot exist, emitting
512  deprecation warnings since 1.36, now throws an exception. Additionally,
513  WikiPage now implements ProperPageIdentity, rather than just PageIdentity.
514* The Skin::bottomScripts() method is deprecated. Please instead use
515  OutputPage::getBottomScripts().
516* LinksUpdate::getTriggeringUser() now returns ?UserIdentity instead of ?User.
517* The LESS mixin `.box-shadow()` (from mediawiki.mixins.less), deprecated since
518  1.36, was removed. Use CSS property `box-shadow` unprefixed for all basic
519  supported browsers instead.
520* The LESS mixin `.flex()` now no longer tries to support the 2009 version of
521  the Flexbox specification; support for the 2012 and modern standard versions
522  remains unchanged.
523* The StorageAwareness::ATTR_SYNCWRITES, StorageAwareness::QOS_SYNCWRITES_*,
524  StorageAwareness::ATTR_LOCALITY, and StorageAwareness::QOS_LOCALITY_*
525  constants were removed.
526
527=== Deprecations in 1.37 ===
528* JobQueue::getWiki(), deprecated in 1.33, now emits deprecation warnings.
529* AbstractBlock::getTargetAndType() and ::getTarget() now emit deprecation
530  warnings. Use ::getTargetName() and ::getTargetUserIdentity() together with
531  ::getType().
532* Passing a UserIdentity to WatchlistManager::clearAllUserNotifications() and
533  WatchlistManager::clearTitleUserNotifications() is now deprecated. Pass an
534  Authority instead.
535* Passing LinkTarget to WatchlistManager::clearTitleUserNotifications() and
536  WatchlistManager::getTitleNotificationTimestamp(). Pass PageIdentity instead.
537* The User class methods ::isWatched(), ::isTempWatched(), ::removeWatch(), and
538  ::addWatch() have been deprecated. Use corresponding methods in
539  WatchlistManager instead.
540* Multiple WatchAction methods have been deprecated in lieu of WatchlistManager:
541   - ::doWatchOrUnwatch() use WatchlistManager::setWatch()
542   - ::doWatch() -> WatchlistManager::addWatch()
543   - ::doUnwatch() -> WatchlistManager::removeWatch()
544* WatchAction::getWatchToken() now emits deprecation warnings. Instead use
545  CsrfTokenSet::getToken().
546* Action::getHookContainer() has been marked as internal. Actions that require
547  access to a hook container should have one injected instead.
548* The ::getTitle() and ::setTitle() methods in Parser have been deprecated.
549  Use ::getPage() and ::setPage() instead.
550* Title::isWatchable() has been deprecated. Use WatchlistManager::isWatchable()
551  instead.
552* Methods and classes related to the primary database, previously referred to as
553  'master', have been deprecated, with the new ones replacing them as follows:
554  - The DBMasterPos and MySQLMasterPos classes have been respectively renamed to
555    DBPrimaryPos and MySQLPrimaryPos.
556  - LocalRepo::getMasterDB() -> ::getPrimaryDB()
557  - ForeignDBRepo::getMasterDB() -> ::getPrimaryDB()
558  - JobQueueDB::getMasterDB() -> ::getPrimaryDB()
559  - ForeignDBViaLBRepo::getMasterDB() -> ::getPrimaryDB()
560  - DBFileJournal::getMasterDB() -> ::getPrimaryDB()
561  - ILoadBalancer::getMasterPos() -> ::getPrimaryPos()
562  - IDatabase::getMasterPos() -> ::getPrimaryPos()
563  - ILoadBalancer::finalizeMasterChanges() -> ::finalizePrimaryChanges()
564  - ILoadBalancer::approveMasterChanges() -> ::approvePrimaryChanges()
565  - ILoadBalancer::beginMasterChanges() -> ::beginPrimaryChanges()
566  - ILBFactory::beginMasterChanges() -> ::beginPrimaryChanges()
567  - ILoadBalancer::commitMasterChanges() -> ::commitPrimaryChanges()
568  - ILBFactory::commitMasterChanges() -> ::commitPrimaryChanges()
569  - IDatabase::getTopologyRootMaster() -> ::getTopologyRootPrimary()
570  - IDatabase::masterPosWait() -> ::primaryPosWait()
571  - ILoadBalancer::runMasterTransactionIdleCallbacks() ->
572      ::runPrimaryTransactionIdleCallbacks()
573  - ILoadBalancer::runMasterTransactionListenerCallbacks() ->
574      ::runPrimaryTransactionListenerCallbacks()
575  - ILoadBalancer::rollbackMasterChanges() -> ::rollbackPrimaryChanges()
576  - ILBFactory::rollbackMasterChanges() -> ::rollbackPrimaryChanges()
577  - ILoadBalancer::flushMasterSnapshots() -> ::flushPrimarySnapshots()
578  - ILoadBalancer::hasMasterConnection() -> ::hasPrimaryConnection()
579  - ILoadBalancer::hasMasterChanges() -> ::hasPrimaryChanges()
580  - ILBFactory::hasMasterChanges() -> ::hasPrimaryChanges()
581  - ILoadBalancer::lastMasterChangeTimestamp() -> ::lastPrimaryChangeTimestamp()
582  - ILoadBalancer::hasOrMadeRecentMasterChanges() ->
583      ::hasOrMadeRecentPrimaryChanges()
584  - ILBFactory::hasOrMadeRecentMasterChanges() ->
585      ::hasOrMadeRecentPrimaryChanges()
586  - ILoadBalancer::pendingMasterChangeCallers() ->
587      ::pendingPrimaryChangeCallers()
588  - ILoadBalancer::forEachOpenMasterConnection() ->
589      ::forEachOpenPrimaryConnection()
590  - ILoadBalancer::waitForMasterPos() -> ::waitForPrimaryPos()
591  - Database::assertIsWritableMaster() -> ::assertIsWritablePrimary()
592  - RevDelList::reloadFromMaster() -> ::reloadFromPrimary()
593  - ExternalStoreDB::getMaster() -> ::getPrimary()
594  - DatabaseMysqlBase::getMasterServerInfo() -> ::getPrimaryServerInfo()
595  - MWExceptionHandler::rollbackMasterChangesAndLog() ->
596      ::rollbackPrimaryChangesAndLog()
597* wfGetLB(), deprecated since 1.27, now emits deprecation warnings.
598* wfLocalFile(), deprecated since 1.34, now emits deprecation warnings.
599* wfFindFile(), deprecated since 1.34, now emits deprecation warnings.
600* wfIncrStats(), deprecated in 1.36, now emits deprecation warnings.
601* wfCanIPUseHTTPS() is now deprecated, and always returns true.
602* The UserLoadFromDatabase hook has been deprecated. It had no known uses.
603* The following methods in ApiPageSet have been deprecated:
604   - ::getTitles(), use ::getTargets() instead.
605   - ::getGoodTitles(), use ::getGoodPages() instead.
606   - ::getMissingTitles(), use ::getMissingPages() instead.
607   - ::getGoodAndMissingTitles(), use ::getGoodAndMissingPages() instead.
608   - ::getRedirectTitles(), use ::getRedirectTargets() instead.
609   - ::getSpecialTitles(), use ::getSpecialPages() instead.
610* The following methods from the User class, deprecated in 1.35, now each emit
611  deprecation warnings:
612   - ::getOptions()
613   - ::isIP()
614   - ::isUsableName()
615   - ::isCreatableName()
616   - ::getCanonicalName()
617   - ::addAutopromoteOnceGroups()
618   - ::getEffectiveGroups()
619   - ::getAutomaticGroups()
620   - ::getFormerGroups()
621   - ::getIntOption()
622   - ::getBoolOption()
623* The following methods in User were deprecated:
624  - ::idFromName() - use UserIdentityLookup::getUserIdentityByName() instead.
625  - ::resetIdByNameCache() - in tests, reset service container. No replacement
626    needed in production code.
627* Use of ActorMigration for any table except revision, deprecated in 1.34, now
628  emits deprecation warnings. Instead of getInsertValues(), use
629  ActorNormalization::acquireActorId(). Instead of getWhere() and getJoin(),
630  do your own join on the actor table.
631* DatabasePostgres::remappedTableName() and its dependent constructor parameter
632  'keywordTableMap' are deprecated. Reserved identifiers that are used as table
633  names should be quoted where necessary.
634* LinkCache::singleton(), deprecated since 1.28, now emits deprecation warnings.
635* MessageCache::singleton(), deprecated since 1.34, now emits deprecation
636  warnings.
637* LockManagerGroup::singleton() and ::destroySingletons(), deprecated since
638  1.34, now emit deprecation warnings.
639* HtmlFileCacheUpdate::newFromTitles() is now deprecated and emitting warnings.
640  Use newFromPages() instead.
641* SessionProvider ::setLogger(), ::setManager(), ::setConfig(), and
642  ::setHookContainer() were deprecated. Use ::init() to inject dependencies, or
643  override ::postInitSetup() to do any custom post-initialization configuration.
644* AbstractAuthenticationProvider ::setLogger(), ::setManager(), ::setConfig(),
645  and ::setHookContainer() now emit deprecation warnings. Use ::init() to inject
646  dependencies, or override ::postInitSetup() to do any custom post-
647  initialization configuration.
648* User::isLoggedIn(), deprecated since 1.36, now emits deprecation warnings. Use
649  the method it wraps, User::isRegistered(), instead.
650* FileBackendGroup::singleton() and ::destroySingletons(), deprecated since
651  1.35, now emit deprecation warnings.
652* The first parameter of User::getBlock() should now be an integer using the
653  Authority::FOR_XXX constants. Providing a boolean is deprecated.
654* ApiBase::addBlockInfoToStatus() is deprecated for use by extensions. It is now
655  marked as @internal and may be deleted in the future.
656  It should not be necessary to call this method, Authority should be providing
657  all relevant information via a PermissionStatus object.
658* JobQueueGroup::singleton() was deprecated - use
659  MediaWikiServices::getJobQueueGroup() instead.
660* JobQueueGroup::destroySingletons() was deprecated. JobQueueGroups are now
661  automatically destroyed after tests.
662* LinkCache::addGoodLinkObj() has been deprecated, since it is prone to
663  corrupting the cache with invalid information. Use addGoodLinkObjFromRow()
664  instead. PHPUnit tests must use LinkCacheTestTrait::addGoodLinkObject().
665* ContentHandler::getContentText() is now deprecated. Use Content::getText()
666  instead.
667* LinkCache::addLinkObj() has been deprecated, use PageStore::getPageForLink()
668  instead.
669* MediaWiki\User\UserNamePrefixSearch::search() previously accepted as its first
670  parameter either the string 'public' or a UserIdentity object, to filter
671  results for. It now expects an Authority object instead of UserIdentity, and
672  providing just a UserIdentity will now trigger a deprecation warning.
673* User::getRights(), deprecated since 1.34, now emits deprecation warnings.
674* User::changeableGroups() and ::changeableByGroup() now emit deprecation
675  warnings, use corresponding methods in UserGroupManager instead.
676* User::incEditCount() was deprecated in favor of the new method
677  UserEditTracker::incrementUserEditCount().
678* RepoGroup::singleton(), ::destroySingleton() and ::setSingleton(), deprecated
679  since 1.34, now emit deprecation warnings.
680* RecentChange::getPerformer(), deprecated since 1.36, now emits deprecation
681  warnings. Use ::getPerformerIdentity() instead.
682* ContentHandler::cleanupHandlersCache(), deprecated since 1.35, now emits
683  deprecation warnings.
684* Category::getTitle() was deprecated in favor of Category::getPage()
685* File::getUser() method now emits deprecation warnings, along with its over-
686  rides in LocalFile and ForeignApiFile in favor of ::getUploader().
687* SpecialBlock::checkUnblockSelf(), deprecated in 1.36, now emits deprecation
688  warnings.
689* (T284179) The mediawiki.viewport ResourceLoader module is deprecated. You can
690  now just use MutationObserver or InterSectionObserver directly, which are
691  widely available in all supported JavaScript browsers.
692* The following constructor options of DatabaseBlock class will now trigger
693  deprecation warnings:
694    - the 'byText' property with blocker's name,
695    - the 'by' property with blocker's ID,
696  For both of these, use the 'by' property with UserIdentity value instead.
697* The BeforeResetNotificationTimestamp hook was deprecated.
698* ArchivedFile::getUser() ::getRawUser() ::getRawUserText() were deprecated in
699  favor of ::getUploader.() ::getRawDescription() was deprecated in favor of
700  ::getDescription() with RAW audience parameter.
701* When calling LocalFile::newFromRow() or LocalFile::loadFromRow(), passing
702  extra fields not requested by ::getQueryInfo() will now trigger deprecation
703  warnings. This is to warn callers that deprefixing and automatic assignment of
704  such fields will not be done in a future version.
705* JobSpecification::getTitle() was deprecated without providing a replacement.
706  It wasn't used and job given the purpose of JobSpecification class it is not
707  needed.
708* The protected method File::getImageSize() is now deprecated.
709* BacklinkCache::get() was deprecated, use
710  BacklinkCacheFactory::getBacklinkCache() instead.
711* Title::getBacklinkCache() now emits deprecation warnings. Instead, use the
712  ::getBacklinkCache() method in the BacklinkCacheFactory service.
713* MediaHandler::getImageSize(), ::getMetadata(), and ::isMetadataValid() were
714  deprecated and should no longer be overridden. Instead, sub-classes should
715  override getSizeAndMetadata().
716* Deprecated File::getMetadata(). Instead use ::getMetadataArray(),
717  ::getMetadataItem() and ::getMetadataItems().
718* Message::title() has been deprecated; use Message::page() instead.
719* BaseTemplate::getAfterPortlet(), BaseTemplate::renderAfterPortlet(), and the
720  BaseTemplateAfterPortlet hook, which were deprecated in 1.35,
721  now emit deprecation warnings.
722* The LocalFile::getHistory() hook is deprecated.
723* Previously the Skin templateDirectory option inside skin.json had to be
724  relative to MediaWiki core. This should now be relative to the skin.
725* Calling WikiPage::prepareContentForEdit() without a UserIdentity is now
726  deprecated.
727* User::getEditTokenObject(), ::getEditToken(), and ::matchEditToken() were each
728  deprecated. Use CsrfTokenRepository, which is available via IContextSource,
729  instead. ::matchEditTokenNoSuffix() was deprecated without replacement.
730  It was introduced to be able to provide custom error message if the token
731  was submitted, but ending slashes were stripped by some ASCII mangling proxy.
732  Use ::matchToken() instead, such proxies are much less common now and there's
733  not much benefit in customising the error message.
734* ContentHandler::getForTitle(), deprecated since 1.35, now emits deprecation
735  warnings.
736* User::listOptionKinds(), deprecated since 1.35, now emits deprecation
737  warnings.
738* WikiPage::doEditContent(), deprecated since 1.32, now emits deprecation
739  warnings.
740* CentralIdLookup::factory() and ::factoryNonLocal() now emit deprecation
741  warnings; obtain an instance from MediaWikiServices instead.
742* The class RandomPage was renamed to SpecialRandomPage. The class RandomPage
743  is now deprecated.
744* BotPassword::invalidateAllPasswordsForCentralId() was deprecated.
745* BotPassword::removeAllPasswordsForCentralId() was deprecated.
746* The Title class members: $mTextform, $mUrlform, $mDbkeyform, $mNamespace,
747  $mInterwiki, and $mFragment have been deprecated to not be used directly.
748  Instead, their corresponding accessor methods should be used.
749* IDatabase::fetchObject(), ::fetchRow(), ::numRows(), ::numFields(),
750  ::fieldName(), ::freeResult() and ::dataSeek() are deprecated. Use the
751  corresponding methods in IResultWrapper instead.
752* ResultWrapper::unwrap(), DatabaseMysqlBase::fieldType() and
753  DatabasePostgres::fieldType() each now emit deprecation warnings.
754* Sub-classes implementing Database::doQuery() should return either boolean or
755  an IResultWrapper. To do otherwise will now trigger a deprecation warning.
756* User::getOptionKinds() and ::resetOptions(), both deprecated since 1.35,
757  now emit deprecation warnings.
758* The following methods in MWNamespace, all deprecated since 1.34, now emit
759  deprecation warnings:
760  - ::isMovable()
761  - ::isSubject()
762  - ::getTalk()
763  - ::getSubject()
764  - ::getAssociated()
765  - ::equals()
766  - ::subjectEquals()
767  - ::hasTalkNamespace()
768  - ::wantSignatures()
769  - ::isWatchable()
770  - ::getSubjectNamespaces()
771  - ::getTalkNamespaces()
772  - ::isCapitalized()
773  - ::hasGenderDistinction()
774  - ::isNonincludable()
775  - ::getNamespaceContentModel()
776  - ::getRestrictionLevels()
777  - ::getCategoryLinkType()
778* LogFormatter::styleRestricedElement() has been deprecated in favor of
779  LogFormatter::styleRestrictedElement()
780* The following hooks related to user preferences were deprecated:
781  - UserLoadOptions: use LoadUserOptions instead.
782  - UserSaveOptions: use SaveUserOptions instead.
783  - UserResetAllOptions: no replacement was provided, the hook is not used.
784* Title::isNamespaceProtected(), deprecated in 1.34, now emits deprecation
785  warnings.
786* UserSelectQueryBuilder::userIds(), ::userNames(), and ::userNamePrefix() has
787  been deprecated in favor of ::whereUserIds(), ::whereUserNames(), and
788  ::whereUserNamePrefix().
789* Manually constructing a MovePage object, deprecated in 1.34, now emits
790  deprecation warnings. Use MovePageFactory instead.
791* The following deletion-related methods were deprecated:
792  - WikiPage::doDeleteArticleReal() (soft) - use DeletePage
793  - WikiPage::doDeleteArticleBatched() (soft) - no replacement
794  - WikiPage::isBatchedDelete() (soft) - use DeletePage
795  - WikiPage::doDeleteUpdates() (hard) - no replacement
796  - WikiPage::getDeletionUpdates() (hard) - no replacement
797  - Title::isBigDeletion (soft) - no replacement
798* Relying on PermissionManager or Authority to check for big deletions
799  was deprecated. This is now automatically checked if you use
800  DeletePage::deleteIfAllowed(). (T288759)
801* The userCan hook now emits deprecation warnings. Use the
802  getUserPermissionsErrors or getUserPermissionsErrorsExpensive hooks instead.
803* Parser::$mUser public access, and the methods ParserOptions::getUser() and
804  Parser::getUser() each now emit deprecation warnings.
805* The following methods in the Title class have been deprecated in favor of the
806  corresponding methods in the new RestrictionStore service (with different
807  names where indicated):
808  - ::areCascadeProtectionSourcesLoaded()
809  - ::areRestrictionsCascading()
810  - ::areRestrictionsLoaded()
811  - ::getAllRestrictions()
812  - ::getCascadeProtectionSources()
813  - ::getFilteredRestrictionTypes()
814      -> ::listAllRestrictionTypes()
815  - ::getRestrictionExpiry()
816  - ::getRestrictionTypes()
817      -> ::listApplicableRestrictionTypes()
818  - ::getRestrictions()
819  - ::isCascadeProtected()
820  - ::isProtected()
821  - ::isSemiProtected()
822  - ::loadRestrictionsFromRows()
823* The following Title methods have been deprecated with no direct public
824  replacement:
825  - ::deleteTitleProtection()
826  - ::getTitleProtection()
827  - ::flushRestrictions()
828  - ::loadRestrictions()
829* User::isAllowUsertalk() now emits deprecation warnings. Use User::getBlock()
830  and AbstractBlock::isUsertalkEditAllowed() instead.
831* Classes used by Preprocessor_DOM have been merged with classes used by
832  Preprocessor_Hash, as Preprocessor_DOM was removed in 1.35.
833   - PPDPart has been merged into PPDPart_Hash
834   - PPDStack has been merged into PPDStack_Hash
835   - PPDStackElement has been merged into PPDStackElement_Hash
836* By default, the global variable $wgUser is now an instance of the new class
837  StubGlobalUser rather than User, and the first time it is used it will emit
838  deprecation warnings (the $wgUser variable was deprecated in 1.35). For
839  extensions that read from this variable, please use a relevant ContextSource
840  instead, falling back to RequestContext::getMain() if none is available.
841* Collation::singleton() and ::factory() were deprecated; obtain an instance of
842  the CollationFactory from MediaWikiServices instead.
843* Title::getDefaultNamespace() has been deprecated to be removed because there
844  are no known callers/consumers.
845* With removal of the stub threshold feature, the following methods now emit
846  deprecation warnings:
847  - LinkRenderer::setStubThreshold() and ::getStubThreshold() - no replacement.
848  - LinkRendererFactory::createForUser() - calling ::create() is now sufficient
849  - ParserOptions::setStubThreshold() and ::getStubThreshold() - no replacement.
850  - User::getStubThreshold() - no replacement.
851* The ArticleDelete and ArticleDeleteComplete hooks were deprecated. Use
852  PageDelete and PageDeleteComplete instead.
853* The ArticleUndeleteLogEntry hook was deprecated without replacement.
854* The following LESS mediawiki.mixins have been deprecated:
855  - .box-sizing()
856  - .transform()
857  - .transform-origin()
858  - .transition()
859  - .transition-transform()
860* The `UndeleteForm::undelete` hook was deprecated. A new hook was
861  introduced, `PageUndelete`, that provides handlers with more information and
862  is also called for non-UI requests. The capability of replacing the
863  PageArchive object has been removed, as that violates the laws of nature.
864
865=== Other changes in 1.37 ===
866* WatchlistManager::addWatch() and WatchlistManager::addWatchIgnoringRights(),
867  which replace User::addWatch(), now call the WatchArticle and
868  WatchArticleComplete hooks.
869* WatchlistManager::removeWatch() and
870  WatchlistManager::removeWatchIgnoringRights(), which replace
871  User::removeWatch(), now call the UnwatchArticle and UnwatchArticleComplete
872  hooks.
873* The overridable postInitSetup() method was added to the
874  AbstractAuthenticationProvider class. A provider can override postInitSetup()
875  to do any custom post-initialization configuration.
876* The overridable postInitSetup() method was added to the SessionProvider
877  class. A provider can override postInitSetup() to do any custom
878  post-initialization configuration.
879* The protected getConfig() method was added to the SessionProvider class.
880  Use SessionProvider::getConfig() to get a config.
881* The DBAccessBase class is deprecated. Classes that used to extend it
882  should get a load balancer (factory) injected in the constructor instead.
883* ActorNormalization::acquireActorId() now requires IDatabase parameter.
884  Not providing one emitted deprecation warnings since 1.36.
885* Anti-lock constants ALF_PRELOAD_LINK, ALF_NO_BLOCK_LOCK, ALF_NO_LINK_LOCK
886  and ALF_PRELOAD_EXISTENCE have been removed. They're unused since 1.25.
887* (T278036) CSS class 'mw-htmlform-field-autoinfuse' used by some forms has been
888  renamed to 'mw-htmlform-autoinfuse'.
889* User::newFromRow() does not accept pre-loaded user preferences under
890  $data['user_properties'] anymore. This optimization was not used.
891* The following files change the letter case of the file names:
892  - SpecialRandompage.php -> SpecialRandomPage.php
893  - SpecialRandomredirect.php -> SpecialRandomRedirect.php
894  - SpecialRandomrootpage.php -> SpecialRandomRootPage.php
895* Media files which are uploaded server side using the importImages.php
896  maintenance script will now have the "mw-server-side-upload" change tag.
897* (T284917) The stub threshold feature has been removed.
898* Skin::getPoweredBy() and Skin::getCopyrightIcon() have been deprecated as they
899  are only designed for use by skins extended BaseTemplate. You can move calls
900  to instead use BaseTemplate::getPoweredByHTML() and ::getCopyrightIconHTML()
901  respectively.
902* The SkinGetPoweredBy hook is deprecated. No replacement is provided.
903* HTMLTitleTextField didn't support interwiki titles well previously.
904  Starting with 1.37, HTMLTitleTextField has a new parameter, 'interwiki',
905  which can be used to control acceptance of interwiki titles. To provide
906  a transitional period, the default value ('interwiki' => null) ensures
907  MW will have the same behavior as before (logging a deprecation warning).
908  In 1.38, the default behavior will change to "interwiki links aren't allowed".
909
910== Compatibility ==
911
912MediaWiki 1.37 requires PHP 7.3.19 or later, or PHP 7.4.3 or later, and the
913following PHP extensions:
914
915* ctype
916* dom
917* fileinfo
918* iconv
919* intl
920* json
921* mbstring
922* xml
923
924Support for PHP 8.0 is not yet complete.
925
926MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
927but support for them is somewhat less mature.
928
929The supported versions are:
930
931* MySQL 5.5.8 or later
932* PostgreSQL 9.4 or later
933* SQLite 3.8.0 or later
934
935== Online documentation ==
936Documentation for both end-users and site administrators is available on
937MediaWiki.org, and is covered under the GNU Free Documentation License (except
938for pages that explicitly state that their contents are in the public domain):
939
940       https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
941
942== Mailing list ==
943A mailing list is available for MediaWiki user support and discussion:
944
945       https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
946
947A low-traffic announcements-only list is also available:
948
949       https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
950
951It's highly recommended that you sign up for one of these lists if you're
952going to run a public MediaWiki, so you can be notified of security fixes.
953
954== IRC help ==
955There's usually someone online in #mediawiki on irc.libera.chat.
956