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 * (T151415) Log email changes.
  16 * (T197206) Fix performance regression when multiple DB used without caching.
  17 * (T197030) PHPSessionHandler: Suppress headers warnings in initialize().
  18 * (T182377, T196793) Exif: Guard against uncountable tag values.
  19 * (T200861) Fix total breakage of SQLite web upgrade.
  20
  21 === Changes since MediaWiki 1.31.0-rc.2 ===
  22 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  23 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  24 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  25 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  26 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  27 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  28 * (T196672) The mtime of extension.json files is now able to be zero
  29 * (T180403) Validate $length in padleft/padright parser functions.
  30 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
  31
  32 === Changes since MediaWiki 1.31.0-rc.0 ===
  33 * (T33223) Drop archive.ar_text and ar_flags.
  34 * Add default edit rate limit of 90 edits/minute for all users.
  35 * (T187645) Use codepoint as tiebreaker when getting first-letters in
  36   IcuCollation.
  37 * (T191947) Don't shell during the installer if shelling out is disabled.
  38 * (T194319) Improve duplicate config setting exception as part of extension
  39   registration.
  40 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
  41 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
  42 * Do not incorrectly hide namespace input field in the installer.
  43 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
  44
  45 === Important pre-upgrade notes for 1.31 ===
  46 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
  47   schema changes, and cannot have downtime to run migrateArchiveText.php and
  48   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
  49   to the ar_text and ar_flags columns of the archive table or make those
  50   columns nullable before upgrading to MediaWiki 1.31.
  51   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
  52
  53 === Configuration changes in 1.31 ===
  54 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
  55   a future version. The API is now considered to be stable, secure and
  56   essential.
  57 * $wgUsejQueryThree was removed, as it is now the default. This was documented
  58   as a temporary variable during the migration period, deprecated since 1.29.
  59 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
  60   possible for fallback images such as png.
  61 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
  62   have the right to mark things patrolled.
  63 * Wikis that contain imported revisions or CentralAuth global blocks should run
  64   maintenance/cleanupUsersWithNoId.php.
  65 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
  66   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
  67 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
  68   are not using the latest version of the Referrer Policy specification.
  69 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
  70   first step of migration to human-readable section IDs that will later result
  71   in 'html5' being the default mode.
  72 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
  73   as upstream is inactive and has no plans to move to PHP 7.
  74 * The old CategorizedRecentChanges feature, including its related configuration
  75   option $wgAllowCategorizedRecentChanges, has been removed.
  76 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
  77   for performance reasons, and installations with this setting will now work as
  78   if it was configured with 'any'.
  79 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
  80   rather than being off by default. If you wish to disable HTML tidying
  81   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
  82   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
  83 * $wgLogAutopatrol now defaults to false instead of true.
  84 * $wgValidateAllHtml was removed and will be ignored.
  85 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
  86   1.25 release notes for more information.
  87 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
  88   framework that it enables. Some extensions mistakenly used this to check
  89   whether any AJAX functionality at all should be enabled, further making this
  90   problematic to retain.
  91 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
  92   has been marked as experimental ever since it was introduced.
  93
  94 === New features in 1.31 ===
  95 * (T76554) User sub-pages named ….json are now protected in the same way that
  96   ….js and ….css pages are, so that configuration options can safely be placed
  97   there.
  98 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
  99   with parentheses for grouping.
 100 * As a first pass in standardizing dialog boxes across the MediaWiki product,
 101   Html class now provides helper methods for messageBox, successBox, errorBox
 102   and warningBox generation.
 103 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
 104   a format like "iw>Example".
 105 * (T20209) Linker (used on history pages, log pages, and so on) will display
 106   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
 107   [[iw:User:Example|iw>Example]].
 108 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
 109   users during an import.
 110 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 111   the ParserOutput::getText() post-cache transformations.
 112 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 113   initial page text for file uploads.
 114 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 115   hash value in the table of basic information.
 116 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 117   ParserOutput::getText() post-cache transformation. This may be disabled by
 118   passing 'deduplicateStyles' => false to that method.
 119 * The identity of the logged-in or IP "actor" for logged actions is being moved
 120   into a new actor table, with the rows in tables such as revision and logging
 121   referring to the actor ID instead of storing the user ID and name/IP in
 122   every row.
 123   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 124     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 125     soon as any necessary extensions are updated.
 126   * Most code accessing rows for logged actions from the database should use
 127     the relevant getQueryInfo() methods to get the information needed to build
 128     the SQL query. The ActorMigration class may also be used to get feature
 129     -flagged information needed to access actor-related fields during the
 130     migration period.
 131 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 132   section without having to roll back the whole transaction.
 133 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 134   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 135   transaction on failure.
 136 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 137 * The CLI installer (maintenance/install.php) learned to detect and include
 138   extensions. Pass --with-extensions to enable that feature.
 139 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 140   "1" for manually patrolled and "2" for autopatrolled actions.
 141 * Extensions can now set their type to "editor" if they provide an editor or
 142   enhance the editing experience.
 143 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 144   property in extension.json. See the documentation at
 145   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 146   for more details and an example.
 147 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 148   discussion pages) now have a tooltip to indicate state, not just colour.
 149
 150 === External library changes in 1.31 ===
 151 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 152   suggested to required. These packages now must be installed via composer
 153   and not via PEAR itself.
 154
 155 ==== Upgraded external libraries ====
 156 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 157 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 158 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 159 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 160 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 161 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 162 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 163 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 164 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 165 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 166 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 167
 168 ==== New external libraries ====
 169 * Added wikimedia/object-factory 1.0.0
 170
 171 ==== Removed and replaced external libraries ====
 172 * (T17845) The deprecated 'jquery.badge' module was removed.
 173 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 174   text-overflow property instead.
 175 * The deprecated 'jquery.placeholder' module was removed.
 176 * The deprecated 'jquery.appear' module was removed. Use the
 177   'mediawiki.viewport' module instead.
 178 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 179
 180 === Bug fixes in 1.31 ===
 181 * (T90902) Non-breaking space in header ID breaks anchor.
 182 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 183   space.
 184 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 185   links is now stripped rather than leaving blank lines in odd places.
 186 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 187 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 188
 189 === Action API changes in 1.31 ===
 190 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 191   removed. It has never made a difference in the output, the name was always
 192   returned regardless.
 193 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 194   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 195   'watchlist' instead.
 196
 197 === Action API internal changes in 1.31 ===
 198 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 199 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 200 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 201
 202 === Languages updated in 1.31 ===
 203 MediaWiki supports over 350 languages. Many localisations are updated
 204 regularly. Below only new and removed languages are listed, as well as
 205 changes to languages because of Phabricator reports.
 206
 207 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 208 * (T182305) New language support: Nyungar (nys).
 209 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 210 * (T186635) New language support: Guianan Creole (gcr).
 211 * (T186647) New language support: Kumyk [къумукъ] (kum).
 212 * (T187750) New language support: Spanish formal address (es-formal).
 213 * (T187824) New language support: Hungarian formal address (hu-formal).
 214 * (T189127) New language support: Gorontalo (gor).
 215
 216 === Breaking changes in 1.31 ===
 217 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 218 * The OutputPage class constructor now requires a context parameter.
 219   Instantiating without context was deprecated in 1.18.
 220 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 221 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 222   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 223 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 224   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 225 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 226   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 227 * The deprecated MW_DIFF_VERSION constant was removed.
 228   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 229 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 230   no access restriction has been removed.
 231 * The Block class will no longer accept usable-but-missing usernames for
 232   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 233   locally or use a new interwiki-format username like "iw>Example".
 234 * The following methods and constants from the WatchedItem class, which were
 235   deprecated in 1.27, have been removed:
 236   * WatchedItem::getTitle()
 237   * WatchedItem::fromUserTitle()
 238   * WatchedItem::addWatch()
 239   * WatchedItem::removeWatch()
 240   * WatchedItem::isWatched()
 241   * WatchedItem::duplicateEntries()
 242   * WatchedItem::IGNORE_USER_RIGHTS
 243   * WatchedItem::CHECK_USER_RIGHTS
 244   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 245 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 246   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 247   variable, has been deprecated since 1.27 and was removed as well.
 248 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 249   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 250   variable, has been deprecated since 1.27 and was removed as well.
 251 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 252   HtmlFormatter\HtmlFormatter class should be used instead.
 253 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 254   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 255   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 256 * The following properties of PreparedEdit were deprecated in 1.21 and have
 257   been removed:
 258   * PreparedEdit->newText
 259   * PreparedEdit->oldText
 260   * PreparedEdit->pst
 261 * ParserOutput objects which are generated using a non-default value for
 262   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 263   cache.
 264 * The following deprecated methods from the OutputPage class have been removed:
 265   * OutputPage::addExtensionStyle(); deprecated in 1.27
 266   * OutputPage::getExtStyle(); deprecated in 1.27
 267   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 268   * OutputPage::setSquidMaxage(); deprecated in 1.27
 269   * OutputPage::readOnlyPage(); deprecated in 1.25
 270   * OutputPage::rateLimited(); deprecated in 1.25
 271   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 272     through the above and with no known uses, was removed.
 273 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 274 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 275   were removed:
 276   * $isCssJsSubpage — use ::isUserConfigPage()
 277   * $isCssSubpage — use ::isUserCssConfigPage()
 278   * $isJsSubpage — use ::isUserJsConfigPage()
 279   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 280   * ::getSummaryInput() – use ::getSummaryInputWidget()
 281   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 282   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 283       ::getCheckboxesDefinition()
 284   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 285       ::getCheckboxesDefinition()
 286 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 287 * In User, the cookie-related methods which were wrappers for the functions on
 288   the response object, and were deprecated in 1.27, have been removed:
 289   * ::setCookie()
 290   * ::clearCookie()
 291   * ::setExtendedLoginCookie()
 292   Note that User::setCookies() remains, and is not deprecated.
 293 * Also in User, some auth-related methods which were deprecated in 1.27 have
 294   been removed:
 295   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 296   * ::getPasswordFactory() – create a PasswordFactory directly
 297   * ::passwordChangeInputAttribs()
 298 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 299   been removed.
 300 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 301   use ::getNames() instead.
 302 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 303   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 304 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 305   Wikimedia\base_convert() directly.
 306 * Calling Database::begin() explicitly during an implicit transaction or when
 307   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 308   for an implicit transaction also results in an exception. Previously these
 309   were logged as errors. The startAtomic() and endAtomic() methods, or
 310   AtomicSectionUpdate should be used instead.
 311 * The global function wfOutputHandler() was removed, use the its replacement
 312   MediaWiki\OutputHandler::handle() instead. The global function was only
 313   sometimes defined. Its replacement is always available via the autoloader.
 314 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 315   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 316   ::listSoftwareDefinedTags() instead.
 317 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 318   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 319 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 320 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 321 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 322   ResourceLoaderModule::getLessVars() to expose local variables instead of
 323   global ones.
 324 * As part of work to modernise user-generated content clean-up, a config option
 325   and some methods related to HTML validity were removed without deprecation.
 326   The public methods MWTidy::checkErrors() and the path through which it was
 327   called, TidyDriverBase::validate(), are removed, as are the testing methods
 328   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 329   The $wgValidateAllHtml configuration option is removed and will be ignored.
 330 * Execution of external programs using MediaWiki\Shell\Command now applies
 331   the RESTRICT_DEFAULT Firejail restriction by default.
 332 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 333   deprecated in 1.26, were removed.
 334 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 335   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 336
 337 === Deprecations in 1.31 ===
 338 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 339   RevisionRecord and its subclasses.
 340 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 341 * The global function wfCountDown is now deprecated in favor of
 342   Maintenance::countDown.
 343 * Several methods for returning lists of fields to select from the database
 344   have been deprecated in favor of similar methods that also return the tables
 345   to select from and the join conditions for those tables.
 346   * Block::selectFields() → Block::getQueryInfo()
 347   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 348   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 349   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 350   * LocalFile::getCacheFields() with a prefix no longer works
 351   * LocalFile::getLazyCacheFields() with a prefix no longer works
 352   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 353   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 354   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 355   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 356   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 357   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 358   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 359   * Revision::selectFields() → Revision::getQueryInfo()
 360   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 361   * User::selectFields() → User::getQueryInfo()
 362   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 363 * Revision::setUserIdAndName() was deprecated.
 364 * Access to TitleValue class properties was deprecated, the relevant getters
 365   should be used instead.
 366 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 367   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 368 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 369   Maintenance::fatalError() instead.
 370 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 371 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 372   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 373   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 374 * The following methods that get and set ParserOutput state are deprecated.
 375   Callers should use the new stateless $options parameter to
 376   ParserOutput::getText() instead.
 377   * ParserOptions::getEditSection()
 378   * ParserOptions::setEditSection()
 379   * ParserOutput::getEditSectionTokens()
 380   * ParserOutput::setEditSectionTokens()
 381   * ParserOutput::getTOCEnabled()
 382   * ParserOutput::setTOCEnabled()
 383   * OutputPage::enableSectionEditLinks()
 384   * OutputPage::sectionEditLinksEnabled()
 385   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 386     are also deprecated.
 387 * License::getLicenses has been deprecated; use License::getLines instead.
 388 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 389   Setting template variables by reference allowed violating the principle of
 390   data being immutable once added to the skin template. In practice, this method
 391   was not being used for that. Rather, setRef() existed as memory optimisation
 392   for PHP 4.
 393 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 394   favour of Skin::msg() parameters.
 395 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 396   wfMessage().
 397 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 398   'unwrap' transform to ParserOutput::getText() instead.
 399 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 400   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 401   used instead.
 402 * CommentStore::newKey is deprecated. Instead, get an instance from
 403   MediaWikiServices.
 404 * The following CommentStore methods have had their signatures changed to
 405   introduce a $key parameter, usage of the methods on instances retrieved from
 406   CommentStore::newKey will remain unchanged but deprecated:
 407   * CommentStore::getFields
 408   * CommentStore::getJoin
 409   * CommentStore::getComment
 410   * CommentStore::getCommentLegacy
 411   * CommentStore::insert
 412   * CommentStore::insertWithTemplate
 413 * The following methods in Title have been renamed, and the old ones are
 414   deprecated:
 415   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 416   * Title::isCssOrJsPage – use ::isSiteConfigPage
 417   * Title::isCssJsSubpage – use ::isUserConfigPage
 418   * Title::isCssSubpage – use ::isUserCssConfigPage
 419   * Title::isJsSubpage – use ::isUserJsConfigPage
 420 * The following methods related to caching of half-parsed HTML were deprecated:
 421   * Parser::serializeHalfParsedText()
 422   * Parser::unserializeHalfParsedText()
 423   * Parser::isValidHalfParsedText()
 424   * StripState::getSubState()
 425   * StripState::merge()
 426 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 427 * The type string for the parameter $lang of DateFormatter::getInstance is
 428   deprecated.
 429 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 430 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 431   used instead.
 432 * The function wfShellWikiCmd() has been deprecated, use
 433   MediaWiki\Shell::makeScriptCommand().
 434 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 435   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 436
 437 === Other changes in 1.31 ===
 438 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 439 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 440   continues at Grade A.
 441 * Multi-content-revision capability was introduced into the storage layer. See
 442   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 443 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 444   Links written using square brackets will get the class "text" not "free".
 445 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 446   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 447   headings, HTML list items, HTML table captions, HTML table headings, HTML
 448   table cells will not have this trimming behavior.
 449
 450 == Compatibility ==
 451 MediaWiki 1.31 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 452 supported, it is generally advised to use PHP 7.0.0 or later for long term
 453 support.
 454
 455 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 456 but support for them is somewhat less mature. There is experimental support for
 457 Oracle and Microsoft SQL Server.
 458
 459 The supported versions are:
 460
 461 * MySQL 5.5.8 or later
 462 * PostgreSQL 9.2 or later
 463 * SQLite 3.3.7 or later
 464 * Oracle 9.0.1 or later
 465 * Microsoft SQL Server 2005 (9.00.1399)
 466
 467 == Upgrading ==
 468 1.31 has several database changes since 1.30, and will not work without schema
 469 updates. Note that due to changes to some very large tables like the revision
 470 table, the schema update may take quite long (minutes on a medium sized site,
 471 many hours on a large site).
 472
 473 Don't forget to always back up your database before upgrading!
 474
 475 See the file UPGRADE for more detailed upgrade instructions, including
 476 important information when upgrading from versions prior to 1.11.
 477
 478 For notes on 1.30.x and older releases, see HISTORY.
 479
 480 == Online documentation ==
 481 Documentation for both end-users and site administrators is available on
 482 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 483 for pages that explicitly state that their contents are in the public domain):
 484
 485        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 486
 487 == Mailing list ==
 488 A mailing list is available for MediaWiki user support and discussion:
 489
 490        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 491
 492 A low-traffic announcements-only list is also available:
 493
 494        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 495
 496 It's highly recommended that you sign up for one of these lists if you're
 497 going to run a public MediaWiki, so you can be notified of security fixes.
 498
 499 == IRC help ==
 500 There's usually someone online in #mediawiki on irc.freenode.net.