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