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