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 * (T198037) GitInfo: Don't try shelling out if it's disabled.
  15
  16 == MediaWiki 1.31 ==
  17
  18 === Changes since MediaWiki 1.31.0-rc.2 ===
  19 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  20 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  21 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  22 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  23 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  24 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  25 * (T196672) The mtime of extension.json files is now able to be zero
  26 * (T180403) Validate $length in padleft/padright parser functions.
  27 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
  28
  29 === Changes since MediaWiki 1.31.0-rc.0 ===
  30 * (T33223) Drop archive.ar_text and ar_flags.
  31 * Add default edit rate limit of 90 edits/minute for all users.
  32 * (T187645) Use codepoint as tiebreaker when getting first-letters in
  33   IcuCollation.
  34 * (T191947) Don't shell during the installer if shelling out is disabled.
  35 * (T194319) Improve duplicate config setting exception as part of extension
  36   registration.
  37 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
  38 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
  39 * Do not incorrectly hide namespace input field in the installer.
  40 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
  41
  42 === Important pre-upgrade notes for 1.31 ===
  43 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
  44   schema changes, and cannot have downtime to run migrateArchiveText.php and
  45   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
  46   to the ar_text and ar_flags columns of the archive table or make those
  47   columns nullable before upgrading to MediaWiki 1.31.
  48   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
  49
  50 === Configuration changes in 1.31 ===
  51 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
  52   a future version. The API is now considered to be stable, secure and
  53   essential.
  54 * $wgUsejQueryThree was removed, as it is now the default. This was documented
  55   as a temporary variable during the migration period, deprecated since 1.29.
  56 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
  57   possible for fallback images such as png.
  58 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
  59   have the right to mark things patrolled.
  60 * Wikis that contain imported revisions or CentralAuth global blocks should run
  61   maintenance/cleanupUsersWithNoId.php.
  62 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
  63   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
  64 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
  65   are not using the latest version of the Referrer Policy specification.
  66 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
  67   first step of migration to human-readable section IDs that will later result
  68   in 'html5' being the default mode.
  69 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
  70   as upstream is inactive and has no plans to move to PHP 7.
  71 * The old CategorizedRecentChanges feature, including its related configuration
  72   option $wgAllowCategorizedRecentChanges, has been removed.
  73 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
  74   for performance reasons, and installations with this setting will now work as
  75   if it was configured with 'any'.
  76 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
  77   rather than being off by default. If you wish to disable HTML tidying
  78   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
  79   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
  80 * $wgLogAutopatrol now defaults to false instead of true.
  81 * $wgValidateAllHtml was removed and will be ignored.
  82 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
  83   1.25 release notes for more information.
  84 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
  85   framework that it enables. Some extensions mistakenly used this to check
  86   whether any AJAX functionality at all should be enabled, further making this
  87   problematic to retain.
  88 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
  89   has been marked as experimental ever since it was introduced.
  90
  91 === New features in 1.31 ===
  92 * (T76554) User sub-pages named ….json are now protected in the same way that
  93   ….js and ….css pages are, so that configuration options can safely be placed
  94   there.
  95 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
  96   with parentheses for grouping.
  97 * As a first pass in standardizing dialog boxes across the MediaWiki product,
  98   Html class now provides helper methods for messageBox, successBox, errorBox
  99   and warningBox generation.
 100 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
 101   a format like "iw>Example".
 102 * (T20209) Linker (used on history pages, log pages, and so on) will display
 103   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
 104   [[iw:User:Example|iw>Example]].
 105 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
 106   users during an import.
 107 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 108   the ParserOutput::getText() post-cache transformations.
 109 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 110   initial page text for file uploads.
 111 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 112   hash value in the table of basic information.
 113 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 114   ParserOutput::getText() post-cache transformation. This may be disabled by
 115   passing 'deduplicateStyles' => false to that method.
 116 * The identity of the logged-in or IP "actor" for logged actions is being moved
 117   into a new actor table, with the rows in tables such as revision and logging
 118   referring to the actor ID instead of storing the user ID and name/IP in
 119   every row.
 120   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 121     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 122     soon as any necessary extensions are updated.
 123   * Most code accessing rows for logged actions from the database should use
 124     the relevant getQueryInfo() methods to get the information needed to build
 125     the SQL query. The ActorMigration class may also be used to get feature
 126     -flagged information needed to access actor-related fields during the
 127     migration period.
 128 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 129   section without having to roll back the whole transaction.
 130 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 131   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 132   transaction on failure.
 133 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 134 * The CLI installer (maintenance/install.php) learned to detect and include
 135   extensions. Pass --with-extensions to enable that feature.
 136 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 137   "1" for manually patrolled and "2" for autopatrolled actions.
 138 * Extensions can now set their type to "editor" if they provide an editor or
 139   enhance the editing experience.
 140 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 141   property in extension.json. See the documentation at
 142   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 143   for more details and an example.
 144 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 145   discussion pages) now have a tooltip to indicate state, not just colour.
 146
 147 === External library changes in 1.31 ===
 148 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 149   suggested to required. These packages now must be installed via composer
 150   and not via PEAR itself.
 151
 152 ==== Upgraded external libraries ====
 153 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 154 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 155 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 156 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 157 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 158 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 159 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 160 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 161 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 162 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 163 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 164
 165 ==== New external libraries ====
 166 * Added wikimedia/object-factory 1.0.0
 167
 168 ==== Removed and replaced external libraries ====
 169 * (T17845) The deprecated 'jquery.badge' module was removed.
 170 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 171   text-overflow property instead.
 172 * The deprecated 'jquery.placeholder' module was removed.
 173 * The deprecated 'jquery.appear' module was removed. Use the
 174   'mediawiki.viewport' module instead.
 175 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 176
 177 === Bug fixes in 1.31 ===
 178 * (T90902) Non-breaking space in header ID breaks anchor.
 179 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 180   space.
 181 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 182   links is now stripped rather than leaving blank lines in odd places.
 183 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 184 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 185
 186 === Action API changes in 1.31 ===
 187 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 188   removed. It has never made a difference in the output, the name was always
 189   returned regardless.
 190 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 191   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 192   'watchlist' instead.
 193
 194 === Action API internal changes in 1.31 ===
 195 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 196 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 197 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 198
 199 === Languages updated in 1.31 ===
 200 MediaWiki supports over 350 languages. Many localisations are updated
 201 regularly. Below only new and removed languages are listed, as well as
 202 changes to languages because of Phabricator reports.
 203
 204 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 205 * (T182305) New language support: Nyungar (nys).
 206 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 207 * (T186635) New language support: Guianan Creole (gcr).
 208 * (T186647) New language support: Kumyk [къумукъ] (kum).
 209 * (T187750) New language support: Spanish formal address (es-formal).
 210 * (T187824) New language support: Hungarian formal address (hu-formal).
 211 * (T189127) New language support: Gorontalo (gor).
 212
 213 === Breaking changes in 1.31 ===
 214 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 215 * The OutputPage class constructor now requires a context parameter.
 216   Instantiating without context was deprecated in 1.18.
 217 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 218 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 219   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 220 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 221   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 222 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 223   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 224 * The deprecated MW_DIFF_VERSION constant was removed.
 225   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 226 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 227   no access restriction has been removed.
 228 * The Block class will no longer accept usable-but-missing usernames for
 229   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 230   locally or use a new interwiki-format username like "iw>Example".
 231 * The following methods and constants from the WatchedItem class, which were
 232   deprecated in 1.27, have been removed:
 233   * WatchedItem::getTitle()
 234   * WatchedItem::fromUserTitle()
 235   * WatchedItem::addWatch()
 236   * WatchedItem::removeWatch()
 237   * WatchedItem::isWatched()
 238   * WatchedItem::duplicateEntries()
 239   * WatchedItem::IGNORE_USER_RIGHTS
 240   * WatchedItem::CHECK_USER_RIGHTS
 241   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 242 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 243   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 244   variable, has been deprecated since 1.27 and was removed as well.
 245 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 246   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 247   variable, has been deprecated since 1.27 and was removed as well.
 248 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 249   HtmlFormatter\HtmlFormatter class should be used instead.
 250 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 251   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 252   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 253 * The following properties of PreparedEdit were deprecated in 1.21 and have
 254   been removed:
 255   * PreparedEdit->newText
 256   * PreparedEdit->oldText
 257   * PreparedEdit->pst
 258 * ParserOutput objects which are generated using a non-default value for
 259   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 260   cache.
 261 * The following deprecated methods from the OutputPage class have been removed:
 262   * OutputPage::addExtensionStyle(); deprecated in 1.27
 263   * OutputPage::getExtStyle(); deprecated in 1.27
 264   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 265   * OutputPage::setSquidMaxage(); deprecated in 1.27
 266   * OutputPage::readOnlyPage(); deprecated in 1.25
 267   * OutputPage::rateLimited(); deprecated in 1.25
 268   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 269     through the above and with no known uses, was removed.
 270 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 271 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 272   were removed:
 273   * $isCssJsSubpage — use ::isUserConfigPage()
 274   * $isCssSubpage — use ::isUserCssConfigPage()
 275   * $isJsSubpage — use ::isUserJsConfigPage()
 276   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 277   * ::getSummaryInput() – use ::getSummaryInputWidget()
 278   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 279   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 280       ::getCheckboxesDefinition()
 281   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 282       ::getCheckboxesDefinition()
 283 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 284 * In User, the cookie-related methods which were wrappers for the functions on
 285   the response object, and were deprecated in 1.27, have been removed:
 286   * ::setCookie()
 287   * ::clearCookie()
 288   * ::setExtendedLoginCookie()
 289   Note that User::setCookies() remains, and is not deprecated.
 290 * Also in User, some auth-related methods which were deprecated in 1.27 have
 291   been removed:
 292   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 293   * ::getPasswordFactory() – create a PasswordFactory directly
 294   * ::passwordChangeInputAttribs()
 295 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 296   been removed.
 297 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 298   use ::getNames() instead.
 299 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 300   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 301 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 302   Wikimedia\base_convert() directly.
 303 * Calling Database::begin() explicitly during an implicit transaction or when
 304   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 305   for an implicit transaction also results in an exception. Previously these
 306   were logged as errors. The startAtomic() and endAtomic() methods, or
 307   AtomicSectionUpdate should be used instead.
 308 * The global function wfOutputHandler() was removed, use the its replacement
 309   MediaWiki\OutputHandler::handle() instead. The global function was only
 310   sometimes defined. Its replacement is always available via the autoloader.
 311 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 312   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 313   ::listSoftwareDefinedTags() instead.
 314 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 315   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 316 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 317 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 318 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 319   ResourceLoaderModule::getLessVars() to expose local variables instead of
 320   global ones.
 321 * As part of work to modernise user-generated content clean-up, a config option
 322   and some methods related to HTML validity were removed without deprecation.
 323   The public methods MWTidy::checkErrors() and the path through which it was
 324   called, TidyDriverBase::validate(), are removed, as are the testing methods
 325   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 326   The $wgValidateAllHtml configuration option is removed and will be ignored.
 327 * Execution of external programs using MediaWiki\Shell\Command now applies
 328   the RESTRICT_DEFAULT Firejail restriction by default.
 329 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 330   deprecated in 1.26, were removed.
 331 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 332   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 333
 334 === Deprecations in 1.31 ===
 335 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 336   RevisionRecord and its subclasses.
 337 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 338 * The global function wfCountDown is now deprecated in favor of
 339   Maintenance::countDown.
 340 * Several methods for returning lists of fields to select from the database
 341   have been deprecated in favor of similar methods that also return the tables
 342   to select from and the join conditions for those tables.
 343   * Block::selectFields() → Block::getQueryInfo()
 344   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 345   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 346   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 347   * LocalFile::getCacheFields() with a prefix no longer works
 348   * LocalFile::getLazyCacheFields() with a prefix no longer works
 349   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 350   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 351   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 352   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 353   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 354   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 355   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 356   * Revision::selectFields() → Revision::getQueryInfo()
 357   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 358   * User::selectFields() → User::getQueryInfo()
 359   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 360 * Revision::setUserIdAndName() was deprecated.
 361 * Access to TitleValue class properties was deprecated, the relevant getters
 362   should be used instead.
 363 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 364   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 365 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 366   Maintenance::fatalError() instead.
 367 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 368 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 369   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 370   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 371 * The following methods that get and set ParserOutput state are deprecated.
 372   Callers should use the new stateless $options parameter to
 373   ParserOutput::getText() instead.
 374   * ParserOptions::getEditSection()
 375   * ParserOptions::setEditSection()
 376   * ParserOutput::getEditSectionTokens()
 377   * ParserOutput::setEditSectionTokens()
 378   * ParserOutput::getTOCEnabled()
 379   * ParserOutput::setTOCEnabled()
 380   * OutputPage::enableSectionEditLinks()
 381   * OutputPage::sectionEditLinksEnabled()
 382   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 383     are also deprecated.
 384 * License::getLicenses has been deprecated; use License::getLines instead.
 385 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 386   Setting template variables by reference allowed violating the principle of
 387   data being immutable once added to the skin template. In practice, this method
 388   was not being used for that. Rather, setRef() existed as memory optimisation
 389   for PHP 4.
 390 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 391   favour of Skin::msg() parameters.
 392 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 393   wfMessage().
 394 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 395   'unwrap' transform to ParserOutput::getText() instead.
 396 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 397   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 398   used instead.
 399 * CommentStore::newKey is deprecated. Instead, get an instance from
 400   MediaWikiServices.
 401 * The following CommentStore methods have had their signatures changed to
 402   introduce a $key parameter, usage of the methods on instances retrieved from
 403   CommentStore::newKey will remain unchanged but deprecated:
 404   * CommentStore::getFields
 405   * CommentStore::getJoin
 406   * CommentStore::getComment
 407   * CommentStore::getCommentLegacy
 408   * CommentStore::insert
 409   * CommentStore::insertWithTemplate
 410 * The following methods in Title have been renamed, and the old ones are
 411   deprecated:
 412   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 413   * Title::isCssOrJsPage – use ::isSiteConfigPage
 414   * Title::isCssJsSubpage – use ::isUserConfigPage
 415   * Title::isCssSubpage – use ::isUserCssConfigPage
 416   * Title::isJsSubpage – use ::isUserJsConfigPage
 417 * The following methods related to caching of half-parsed HTML were deprecated:
 418   * Parser::serializeHalfParsedText()
 419   * Parser::unserializeHalfParsedText()
 420   * Parser::isValidHalfParsedText()
 421   * StripState::getSubState()
 422   * StripState::merge()
 423 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 424 * The type string for the parameter $lang of DateFormatter::getInstance is
 425   deprecated.
 426 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 427 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 428   used instead.
 429 * The function wfShellWikiCmd() has been deprecated, use
 430   MediaWiki\Shell::makeScriptCommand().
 431 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 432   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 433
 434 === Other changes in 1.31 ===
 435 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 436 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 437   continues at Grade A.
 438 * Multi-content-revision capability was introduced into the storage layer. See
 439   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 440 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 441   Links written using square brackets will get the class "text" not "free".
 442 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 443   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 444   headings, HTML list items, HTML table captions, HTML table headings, HTML
 445   table cells will not have this trimming behavior.
 446
 447 == Compatibility ==
 448 MediaWiki 1.31 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 449 supported, it is generally advised to use PHP 7.0.0 or later for long term
 450 support.
 451
 452 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 453 but support for them is somewhat less mature. There is experimental support for
 454 Oracle and Microsoft SQL Server.
 455
 456 The supported versions are:
 457
 458 * MySQL 5.5.8 or later
 459 * PostgreSQL 9.2 or later
 460 * SQLite 3.3.7 or later
 461 * Oracle 9.0.1 or later
 462 * Microsoft SQL Server 2005 (9.00.1399)
 463
 464 == Upgrading ==
 465 1.31 has several database changes since 1.30, and will not work without schema
 466 updates. Note that due to changes to some very large tables like the revision
 467 table, the schema update may take quite long (minutes on a medium sized site,
 468 many hours on a large site).
 469
 470 Don't forget to always back up your database before upgrading!
 471
 472 See the file UPGRADE for more detailed upgrade instructions, including
 473 important information when upgrading from versions prior to 1.11.
 474
 475 For notes on 1.30.x and older releases, see HISTORY.
 476
 477 == Online documentation ==
 478 Documentation for both end-users and site administrators is available on
 479 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 480 for pages that explicitly state that their contents are in the public domain):
 481
 482        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 483
 484 == Mailing list ==
 485 A mailing list is available for MediaWiki user support and discussion:
 486
 487        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 488
 489 A low-traffic announcements-only list is also available:
 490
 491        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 492
 493 It's highly recommended that you sign up for one of these lists if you're
 494 going to run a public MediaWiki, so you can be notified of security fixes.
 495
 496 == IRC help ==
 497 There's usually someone online in #mediawiki on irc.freenode.net.