RELEASE-NOTES-1.31

   1 == MediaWiki 1.31.1 ==
   2
   3 THIS IS NOT A RELEASE YET!
   4
   5 This is a security and maintenance release of the MediaWiki 1.31 branch.
   6
   7 === Changes since MediaWiki 1.31.0 ===
   8 * (T197229) Bundle Nuke extension, it was accidentally omitted.
   9 * (T193995) Fix undefined patchPath() method call in parser tests.
  10 * (T198687) Fix various selectFields methods to use the string 'NULL', not null.
  11 * Special:BotPasswords now requires reauthentication.
  12 * (T191608, T187638) Add 'logid' parameter to Special:Log.
  13 * (T193829) Indicate when a Bot Password needs reset.
  14
  15 == MediaWiki 1.31 ==
  16
  17 === Changes since MediaWiki 1.31.0-rc.2 ===
  18 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  19 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  20 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  21 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  22 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  23 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  24 * (T196672) The mtime of extension.json files is now able to be zero
  25 * (T180403) Validate $length in padleft/padright parser functions.
  26 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
  27
  28 === Changes since MediaWiki 1.31.0-rc.0 ===
  29 * (T33223) Drop archive.ar_text and ar_flags.
  30 * Add default edit rate limit of 90 edits/minute for all users.
  31 * (T187645) Use codepoint as tiebreaker when getting first-letters in
  32   IcuCollation.
  33 * (T191947) Don't shell during the installer if shelling out is disabled.
  34 * (T194319) Improve duplicate config setting exception as part of extension
  35   registration.
  36 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
  37 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
  38 * Do not incorrectly hide namespace input field in the installer.
  39 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
  40
  41 === Important pre-upgrade notes for 1.31 ===
  42 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
  43   schema changes, and cannot have downtime to run migrateArchiveText.php and
  44   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
  45   to the ar_text and ar_flags columns of the archive table or make those
  46   columns nullable before upgrading to MediaWiki 1.31.
  47   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
  48
  49 === Configuration changes in 1.31 ===
  50 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
  51   a future version. The API is now considered to be stable, secure and
  52   essential.
  53 * $wgUsejQueryThree was removed, as it is now the default. This was documented
  54   as a temporary variable during the migration period, deprecated since 1.29.
  55 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
  56   possible for fallback images such as png.
  57 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
  58   have the right to mark things patrolled.
  59 * Wikis that contain imported revisions or CentralAuth global blocks should run
  60   maintenance/cleanupUsersWithNoId.php.
  61 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
  62   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
  63 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
  64   are not using the latest version of the Referrer Policy specification.
  65 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
  66   first step of migration to human-readable section IDs that will later result
  67   in 'html5' being the default mode.
  68 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
  69   as upstream is inactive and has no plans to move to PHP 7.
  70 * The old CategorizedRecentChanges feature, including its related configuration
  71   option $wgAllowCategorizedRecentChanges, has been removed.
  72 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
  73   for performance reasons, and installations with this setting will now work as
  74   if it was configured with 'any'.
  75 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
  76   rather than being off by default. If you wish to disable HTML tidying
  77   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
  78   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
  79 * $wgLogAutopatrol now defaults to false instead of true.
  80 * $wgValidateAllHtml was removed and will be ignored.
  81 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
  82   1.25 release notes for more information.
  83 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
  84   framework that it enables. Some extensions mistakenly used this to check
  85   whether any AJAX functionality at all should be enabled, further making this
  86   problematic to retain.
  87 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
  88   has been marked as experimental ever since it was introduced.
  89
  90 === New features in 1.31 ===
  91 * (T76554) User sub-pages named ….json are now protected in the same way that
  92   ….js and ….css pages are, so that configuration options can safely be placed
  93   there.
  94 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
  95   with parentheses for grouping.
  96 * As a first pass in standardizing dialog boxes across the MediaWiki product,
  97   Html class now provides helper methods for messageBox, successBox, errorBox
  98   and warningBox generation.
  99 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
 100   a format like "iw>Example".
 101 * (T20209) Linker (used on history pages, log pages, and so on) will display
 102   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
 103   [[iw:User:Example|iw>Example]].
 104 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
 105   users during an import.
 106 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 107   the ParserOutput::getText() post-cache transformations.
 108 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 109   initial page text for file uploads.
 110 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 111   hash value in the table of basic information.
 112 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 113   ParserOutput::getText() post-cache transformation. This may be disabled by
 114   passing 'deduplicateStyles' => false to that method.
 115 * The identity of the logged-in or IP "actor" for logged actions is being moved
 116   into a new actor table, with the rows in tables such as revision and logging
 117   referring to the actor ID instead of storing the user ID and name/IP in
 118   every row.
 119   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 120     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 121     soon as any necessary extensions are updated.
 122   * Most code accessing rows for logged actions from the database should use
 123     the relevant getQueryInfo() methods to get the information needed to build
 124     the SQL query. The ActorMigration class may also be used to get feature
 125     -flagged information needed to access actor-related fields during the
 126     migration period.
 127 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 128   section without having to roll back the whole transaction.
 129 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 130   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 131   transaction on failure.
 132 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 133 * The CLI installer (maintenance/install.php) learned to detect and include
 134   extensions. Pass --with-extensions to enable that feature.
 135 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 136   "1" for manually patrolled and "2" for autopatrolled actions.
 137 * Extensions can now set their type to "editor" if they provide an editor or
 138   enhance the editing experience.
 139 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 140   property in extension.json. See the documentation at
 141   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 142   for more details and an example.
 143 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 144   discussion pages) now have a tooltip to indicate state, not just colour.
 145
 146 === External library changes in 1.31 ===
 147 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 148   suggested to required. These packages now must be installed via composer
 149   and not via PEAR itself.
 150
 151 ==== Upgraded external libraries ====
 152 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 153 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 154 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 155 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 156 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 157 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 158 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 159 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 160 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 161 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 162 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 163
 164 ==== New external libraries ====
 165 * Added wikimedia/object-factory 1.0.0
 166
 167 ==== Removed and replaced external libraries ====
 168 * (T17845) The deprecated 'jquery.badge' module was removed.
 169 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 170   text-overflow property instead.
 171 * The deprecated 'jquery.placeholder' module was removed.
 172 * The deprecated 'jquery.appear' module was removed. Use the
 173   'mediawiki.viewport' module instead.
 174 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 175
 176 === Bug fixes in 1.31 ===
 177 * (T90902) Non-breaking space in header ID breaks anchor.
 178 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 179   space.
 180 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 181   links is now stripped rather than leaving blank lines in odd places.
 182 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 183 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 184
 185 === Action API changes in 1.31 ===
 186 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 187   removed. It has never made a difference in the output, the name was always
 188   returned regardless.
 189 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 190   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 191   'watchlist' instead.
 192
 193 === Action API internal changes in 1.31 ===
 194 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 195 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 196 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 197
 198 === Languages updated in 1.31 ===
 199 MediaWiki supports over 350 languages. Many localisations are updated
 200 regularly. Below only new and removed languages are listed, as well as
 201 changes to languages because of Phabricator reports.
 202
 203 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 204 * (T182305) New language support: Nyungar (nys).
 205 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 206 * (T186635) New language support: Guianan Creole (gcr).
 207 * (T186647) New language support: Kumyk [къумукъ] (kum).
 208 * (T187750) New language support: Spanish formal address (es-formal).
 209 * (T187824) New language support: Hungarian formal address (hu-formal).
 210 * (T189127) New language support: Gorontalo (gor).
 211
 212 === Breaking changes in 1.31 ===
 213 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 214 * The OutputPage class constructor now requires a context parameter.
 215   Instantiating without context was deprecated in 1.18.
 216 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 217 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 218   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 219 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 220   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 221 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 222   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 223 * The deprecated MW_DIFF_VERSION constant was removed.
 224   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 225 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 226   no access restriction has been removed.
 227 * The Block class will no longer accept usable-but-missing usernames for
 228   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 229   locally or use a new interwiki-format username like "iw>Example".
 230 * The following methods and constants from the WatchedItem class, which were
 231   deprecated in 1.27, have been removed:
 232   * WatchedItem::getTitle()
 233   * WatchedItem::fromUserTitle()
 234   * WatchedItem::addWatch()
 235   * WatchedItem::removeWatch()
 236   * WatchedItem::isWatched()
 237   * WatchedItem::duplicateEntries()
 238   * WatchedItem::IGNORE_USER_RIGHTS
 239   * WatchedItem::CHECK_USER_RIGHTS
 240   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 241 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 242   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 243   variable, has been deprecated since 1.27 and was removed as well.
 244 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 245   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 246   variable, has been deprecated since 1.27 and was removed as well.
 247 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 248   HtmlFormatter\HtmlFormatter class should be used instead.
 249 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 250   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 251   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 252 * The following properties of PreparedEdit were deprecated in 1.21 and have
 253   been removed:
 254   * PreparedEdit->newText
 255   * PreparedEdit->oldText
 256   * PreparedEdit->pst
 257 * ParserOutput objects which are generated using a non-default value for
 258   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 259   cache.
 260 * The following deprecated methods from the OutputPage class have been removed:
 261   * OutputPage::addExtensionStyle(); deprecated in 1.27
 262   * OutputPage::getExtStyle(); deprecated in 1.27
 263   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 264   * OutputPage::setSquidMaxage(); deprecated in 1.27
 265   * OutputPage::readOnlyPage(); deprecated in 1.25
 266   * OutputPage::rateLimited(); deprecated in 1.25
 267   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 268     through the above and with no known uses, was removed.
 269 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 270 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 271   were removed:
 272   * $isCssJsSubpage — use ::isUserConfigPage()
 273   * $isCssSubpage — use ::isUserCssConfigPage()
 274   * $isJsSubpage — use ::isUserJsConfigPage()
 275   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 276   * ::getSummaryInput() – use ::getSummaryInputWidget()
 277   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 278   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 279       ::getCheckboxesDefinition()
 280   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 281       ::getCheckboxesDefinition()
 282 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 283 * In User, the cookie-related methods which were wrappers for the functions on
 284   the response object, and were deprecated in 1.27, have been removed:
 285   * ::setCookie()
 286   * ::clearCookie()
 287   * ::setExtendedLoginCookie()
 288   Note that User::setCookies() remains, and is not deprecated.
 289 * Also in User, some auth-related methods which were deprecated in 1.27 have
 290   been removed:
 291   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 292   * ::getPasswordFactory() – create a PasswordFactory directly
 293   * ::passwordChangeInputAttribs()
 294 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 295   been removed.
 296 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 297   use ::getNames() instead.
 298 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 299   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 300 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 301   Wikimedia\base_convert() directly.
 302 * Calling Database::begin() explicitly during an implicit transaction or when
 303   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 304   for an implicit transaction also results in an exception. Previously these
 305   were logged as errors. The startAtomic() and endAtomic() methods, or
 306   AtomicSectionUpdate should be used instead.
 307 * The global function wfOutputHandler() was removed, use the its replacement
 308   MediaWiki\OutputHandler::handle() instead. The global function was only
 309   sometimes defined. Its replacement is always available via the autoloader.
 310 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 311   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 312   ::listSoftwareDefinedTags() instead.
 313 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 314   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 315 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 316 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 317 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 318   ResourceLoaderModule::getLessVars() to expose local variables instead of
 319   global ones.
 320 * As part of work to modernise user-generated content clean-up, a config option
 321   and some methods related to HTML validity were removed without deprecation.
 322   The public methods MWTidy::checkErrors() and the path through which it was
 323   called, TidyDriverBase::validate(), are removed, as are the testing methods
 324   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 325   The $wgValidateAllHtml configuration option is removed and will be ignored.
 326 * Execution of external programs using MediaWiki\Shell\Command now applies
 327   the RESTRICT_DEFAULT Firejail restriction by default.
 328 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 329   deprecated in 1.26, were removed.
 330 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 331   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 332
 333 === Deprecations in 1.31 ===
 334 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 335   RevisionRecord and its subclasses.
 336 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 337 * The global function wfCountDown is now deprecated in favor of
 338   Maintenance::countDown.
 339 * Several methods for returning lists of fields to select from the database
 340   have been deprecated in favor of similar methods that also return the tables
 341   to select from and the join conditions for those tables.
 342   * Block::selectFields() → Block::getQueryInfo()
 343   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 344   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 345   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 346   * LocalFile::getCacheFields() with a prefix no longer works
 347   * LocalFile::getLazyCacheFields() with a prefix no longer works
 348   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 349   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 350   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 351   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 352   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 353   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 354   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 355   * Revision::selectFields() → Revision::getQueryInfo()
 356   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 357   * User::selectFields() → User::getQueryInfo()
 358   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 359 * Revision::setUserIdAndName() was deprecated.
 360 * Access to TitleValue class properties was deprecated, the relevant getters
 361   should be used instead.
 362 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 363   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 364 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 365   Maintenance::fatalError() instead.
 366 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 367 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 368   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 369   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 370 * The following methods that get and set ParserOutput state are deprecated.
 371   Callers should use the new stateless $options parameter to
 372   ParserOutput::getText() instead.
 373   * ParserOptions::getEditSection()
 374   * ParserOptions::setEditSection()
 375   * ParserOutput::getEditSectionTokens()
 376   * ParserOutput::setEditSectionTokens()
 377   * ParserOutput::getTOCEnabled()
 378   * ParserOutput::setTOCEnabled()
 379   * OutputPage::enableSectionEditLinks()
 380   * OutputPage::sectionEditLinksEnabled()
 381   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 382     are also deprecated.
 383 * License::getLicenses has been deprecated; use License::getLines instead.
 384 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 385   Setting template variables by reference allowed violating the principle of
 386   data being immutable once added to the skin template. In practice, this method
 387   was not being used for that. Rather, setRef() existed as memory optimisation
 388   for PHP 4.
 389 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 390   favour of Skin::msg() parameters.
 391 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 392   wfMessage().
 393 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 394   'unwrap' transform to ParserOutput::getText() instead.
 395 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 396   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 397   used instead.
 398 * CommentStore::newKey is deprecated. Instead, get an instance from
 399   MediaWikiServices.
 400 * The following CommentStore methods have had their signatures changed to
 401   introduce a $key parameter, usage of the methods on instances retrieved from
 402   CommentStore::newKey will remain unchanged but deprecated:
 403   * CommentStore::getFields
 404   * CommentStore::getJoin
 405   * CommentStore::getComment
 406   * CommentStore::getCommentLegacy
 407   * CommentStore::insert
 408   * CommentStore::insertWithTemplate
 409 * The following methods in Title have been renamed, and the old ones are
 410   deprecated:
 411   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 412   * Title::isCssOrJsPage – use ::isSiteConfigPage
 413   * Title::isCssJsSubpage – use ::isUserConfigPage
 414   * Title::isCssSubpage – use ::isUserCssConfigPage
 415   * Title::isJsSubpage – use ::isUserJsConfigPage
 416 * The following methods related to caching of half-parsed HTML were deprecated:
 417   * Parser::serializeHalfParsedText()
 418   * Parser::unserializeHalfParsedText()
 419   * Parser::isValidHalfParsedText()
 420   * StripState::getSubState()
 421   * StripState::merge()
 422 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 423 * The type string for the parameter $lang of DateFormatter::getInstance is
 424   deprecated.
 425 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 426 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 427   used instead.
 428 * The function wfShellWikiCmd() has been deprecated, use
 429   MediaWiki\Shell::makeScriptCommand().
 430 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 431   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 432
 433 === Other changes in 1.31 ===
 434 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 435 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 436   continues at Grade A.
 437 * Multi-content-revision capability was introduced into the storage layer. See
 438   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 439 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 440   Links written using square brackets will get the class "text" not "free".
 441 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 442   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 443   headings, HTML list items, HTML table captions, HTML table headings, HTML
 444   table cells will not have this trimming behavior.
 445
 446 == Compatibility ==
 447 MediaWiki 1.31 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 448 supported, it is generally advised to use PHP 7.0.0 or later for long term
 449 support.
 450
 451 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 452 but support for them is somewhat less mature. There is experimental support for
 453 Oracle and Microsoft SQL Server.
 454
 455 The supported versions are:
 456
 457 * MySQL 5.5.8 or later
 458 * PostgreSQL 9.2 or later
 459 * SQLite 3.3.7 or later
 460 * Oracle 9.0.1 or later
 461 * Microsoft SQL Server 2005 (9.00.1399)
 462
 463 == Upgrading ==
 464 1.31 has several database changes since 1.30, and will not work without schema
 465 updates. Note that due to changes to some very large tables like the revision
 466 table, the schema update may take quite long (minutes on a medium sized site,
 467 many hours on a large site).
 468
 469 Don't forget to always back up your database before upgrading!
 470
 471 See the file UPGRADE for more detailed upgrade instructions, including
 472 important information when upgrading from versions prior to 1.11.
 473
 474 For notes on 1.30.x and older releases, see HISTORY.
 475
 476 == Online documentation ==
 477 Documentation for both end-users and site administrators is available on
 478 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 479 for pages that explicitly state that their contents are in the public domain):
 480
 481        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 482
 483 == Mailing list ==
 484 A mailing list is available for MediaWiki user support and discussion:
 485
 486        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 487
 488 A low-traffic announcements-only list is also available:
 489
 490        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 491
 492 It's highly recommended that you sign up for one of these lists if you're
 493 going to run a public MediaWiki, so you can be notified of security fixes.
 494
 495 == IRC help ==
 496 There's usually someone online in #mediawiki on irc.freenode.net.