RELEASE-NOTES-1.31

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