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