RELEASE-NOTES-1.31

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