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