RELEASE-NOTES-1.31

   1 == MediaWiki 1.31 ==
   2
   3 THIS IS NOT A RELEASE YET!
   4
   5 === Changes since MediaWiki 1.31.0 ===
   6 * (T197229) Bundle Nuke extension, it was accidentally omitted.
   7 * (T193995) Fix undefined patchPath() method call in parser tests.
   8 * (T198687) Fix various selectFields methods to use the string 'NULL', not null.
   9
  10 === Changes since MediaWiki 1.31.0-rc.2 ===
  11 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  12 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  13 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  14 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  15 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  16 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  17 * (T196672) The mtime of extension.json files is now able to be zero
  18 * (T180403) Validate $length in padleft/padright parser functions.
  19 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
  20
  21 === Changes since MediaWiki 1.31.0-rc.0 ===
  22 * (T33223) Drop archive.ar_text and ar_flags.
  23 * Add default edit rate limit of 90 edits/minute for all users.
  24 * (T187645) Use codepoint as tiebreaker when getting first-letters in
  25   IcuCollation.
  26 * (T191947) Don't shell during the installer if shelling out is disabled.
  27 * (T194319) Improve duplicate config setting exception as part of extension
  28   registration.
  29 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
  30 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
  31 * Do not incorrectly hide namespace input field in the installer.
  32 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
  33
  34 === Important pre-upgrade notes for 1.31 ===
  35 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
  36   schema changes, and cannot have downtime to run migrateArchiveText.php and
  37   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
  38   to the ar_text and ar_flags columns of the archive table or make those
  39   columns nullable before upgrading to MediaWiki 1.31.
  40   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
  41
  42 === Configuration changes in 1.31 ===
  43 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
  44   a future version. The API is now considered to be stable, secure and
  45   essential.
  46 * $wgUsejQueryThree was removed, as it is now the default. This was documented
  47   as a temporary variable during the migration period, deprecated since 1.29.
  48 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
  49   possible for fallback images such as png.
  50 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
  51   have the right to mark things patrolled.
  52 * Wikis that contain imported revisions or CentralAuth global blocks should run
  53   maintenance/cleanupUsersWithNoId.php.
  54 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
  55   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
  56 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
  57   are not using the latest version of the Referrer Policy specification.
  58 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
  59   first step of migration to human-readable section IDs that will later result
  60   in 'html5' being the default mode.
  61 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
  62   as upstream is inactive and has no plans to move to PHP 7.
  63 * The old CategorizedRecentChanges feature, including its related configuration
  64   option $wgAllowCategorizedRecentChanges, has been removed.
  65 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
  66   for performance reasons, and installations with this setting will now work as
  67   if it was configured with 'any'.
  68 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
  69   rather than being off by default. If you wish to disable HTML tidying
  70   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
  71   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
  72 * $wgLogAutopatrol now defaults to false instead of true.
  73 * $wgValidateAllHtml was removed and will be ignored.
  74 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
  75   1.25 release notes for more information.
  76 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
  77   framework that it enables. Some extensions mistakenly used this to check
  78   whether any AJAX functionality at all should be enabled, further making this
  79   problematic to retain.
  80 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
  81   has been marked as experimental ever since it was introduced.
  82
  83 === New features in 1.31 ===
  84 * (T76554) User sub-pages named ….json are now protected in the same way that
  85   ….js and ….css pages are, so that configuration options can safely be placed
  86   there.
  87 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
  88   with parentheses for grouping.
  89 * As a first pass in standardizing dialog boxes across the MediaWiki product,
  90   Html class now provides helper methods for messageBox, successBox, errorBox
  91   and warningBox generation.
  92 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
  93   a format like "iw>Example".
  94 * (T20209) Linker (used on history pages, log pages, and so on) will display
  95   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
  96   [[iw:User:Example|iw>Example]].
  97 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
  98   users during an import.
  99 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 100   the ParserOutput::getText() post-cache transformations.
 101 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 102   initial page text for file uploads.
 103 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 104   hash value in the table of basic information.
 105 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 106   ParserOutput::getText() post-cache transformation. This may be disabled by
 107   passing 'deduplicateStyles' => false to that method.
 108 * The identity of the logged-in or IP "actor" for logged actions is being moved
 109   into a new actor table, with the rows in tables such as revision and logging
 110   referring to the actor ID instead of storing the user ID and name/IP in
 111   every row.
 112   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 113     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 114     soon as any necessary extensions are updated.
 115   * Most code accessing rows for logged actions from the database should use
 116     the relevant getQueryInfo() methods to get the information needed to build
 117     the SQL query. The ActorMigration class may also be used to get feature
 118     -flagged information needed to access actor-related fields during the
 119     migration period.
 120 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 121   section without having to roll back the whole transaction.
 122 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 123   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 124   transaction on failure.
 125 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 126 * The CLI installer (maintenance/install.php) learned to detect and include
 127   extensions. Pass --with-extensions to enable that feature.
 128 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 129   "1" for manually patrolled and "2" for autopatrolled actions.
 130 * Extensions can now set their type to "editor" if they provide an editor or
 131   enhance the editing experience.
 132 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 133   property in extension.json. See the documentation at
 134   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 135   for more details and an example.
 136 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 137   discussion pages) now have a tooltip to indicate state, not just colour.
 138
 139 === External library changes in 1.31 ===
 140 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 141   suggested to required. These packages now must be installed via composer
 142   and not via PEAR itself.
 143
 144 ==== Upgraded external libraries ====
 145 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 146 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 147 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 148 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 149 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 150 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 151 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 152 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 153 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 154 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 155 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 156
 157 ==== New external libraries ====
 158 * Added wikimedia/object-factory 1.0.0
 159
 160 ==== Removed and replaced external libraries ====
 161 * (T17845) The deprecated 'jquery.badge' module was removed.
 162 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 163   text-overflow property instead.
 164 * The deprecated 'jquery.placeholder' module was removed.
 165 * The deprecated 'jquery.appear' module was removed. Use the
 166   'mediawiki.viewport' module instead.
 167 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 168
 169 === Bug fixes in 1.31 ===
 170 * (T90902) Non-breaking space in header ID breaks anchor.
 171 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 172   space.
 173 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 174   links is now stripped rather than leaving blank lines in odd places.
 175 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 176 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 177
 178 === Action API changes in 1.31 ===
 179 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 180   removed. It has never made a difference in the output, the name was always
 181   returned regardless.
 182 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 183   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 184   'watchlist' instead.
 185
 186 === Action API internal changes in 1.31 ===
 187 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 188 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 189 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 190
 191 === Languages updated in 1.31 ===
 192 MediaWiki supports over 350 languages. Many localisations are updated
 193 regularly. Below only new and removed languages are listed, as well as
 194 changes to languages because of Phabricator reports.
 195
 196 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 197 * (T182305) New language support: Nyungar (nys).
 198 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 199 * (T186635) New language support: Guianan Creole (gcr).
 200 * (T186647) New language support: Kumyk [къумукъ] (kum).
 201 * (T187750) New language support: Spanish formal address (es-formal).
 202 * (T187824) New language support: Hungarian formal address (hu-formal).
 203 * (T189127) New language support: Gorontalo (gor).
 204
 205 === Breaking changes in 1.31 ===
 206 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 207 * The OutputPage class constructor now requires a context parameter.
 208   Instantiating without context was deprecated in 1.18.
 209 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 210 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 211   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 212 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 213   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 214 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 215   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 216 * The deprecated MW_DIFF_VERSION constant was removed.
 217   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 218 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 219   no access restriction has been removed.
 220 * The Block class will no longer accept usable-but-missing usernames for
 221   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 222   locally or use a new interwiki-format username like "iw>Example".
 223 * The following methods and constants from the WatchedItem class, which were
 224   deprecated in 1.27, have been removed:
 225   * WatchedItem::getTitle()
 226   * WatchedItem::fromUserTitle()
 227   * WatchedItem::addWatch()
 228   * WatchedItem::removeWatch()
 229   * WatchedItem::isWatched()
 230   * WatchedItem::duplicateEntries()
 231   * WatchedItem::IGNORE_USER_RIGHTS
 232   * WatchedItem::CHECK_USER_RIGHTS
 233   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 234 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 235   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 236   variable, has been deprecated since 1.27 and was removed as well.
 237 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 238   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 239   variable, has been deprecated since 1.27 and was removed as well.
 240 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 241   HtmlFormatter\HtmlFormatter class should be used instead.
 242 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 243   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 244   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 245 * The following properties of PreparedEdit were deprecated in 1.21 and have
 246   been removed:
 247   * PreparedEdit->newText
 248   * PreparedEdit->oldText
 249   * PreparedEdit->pst
 250 * ParserOutput objects which are generated using a non-default value for
 251   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 252   cache.
 253 * The following deprecated methods from the OutputPage class have been removed:
 254   * OutputPage::addExtensionStyle(); deprecated in 1.27
 255   * OutputPage::getExtStyle(); deprecated in 1.27
 256   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 257   * OutputPage::setSquidMaxage(); deprecated in 1.27
 258   * OutputPage::readOnlyPage(); deprecated in 1.25
 259   * OutputPage::rateLimited(); deprecated in 1.25
 260   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 261     through the above and with no known uses, was removed.
 262 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 263 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 264   were removed:
 265   * $isCssJsSubpage — use ::isUserConfigPage()
 266   * $isCssSubpage — use ::isUserCssConfigPage()
 267   * $isJsSubpage — use ::isUserJsConfigPage()
 268   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 269   * ::getSummaryInput() – use ::getSummaryInputWidget()
 270   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 271   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 272       ::getCheckboxesDefinition()
 273   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 274       ::getCheckboxesDefinition()
 275 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 276 * In User, the cookie-related methods which were wrappers for the functions on
 277   the response object, and were deprecated in 1.27, have been removed:
 278   * ::setCookie()
 279   * ::clearCookie()
 280   * ::setExtendedLoginCookie()
 281   Note that User::setCookies() remains, and is not deprecated.
 282 * Also in User, some auth-related methods which were deprecated in 1.27 have
 283   been removed:
 284   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 285   * ::getPasswordFactory() – create a PasswordFactory directly
 286   * ::passwordChangeInputAttribs()
 287 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 288   been removed.
 289 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 290   use ::getNames() instead.
 291 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 292   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 293 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 294   Wikimedia\base_convert() directly.
 295 * Calling Database::begin() explicitly during an implicit transaction or when
 296   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 297   for an implicit transaction also results in an exception. Previously these
 298   were logged as errors. The startAtomic() and endAtomic() methods, or
 299   AtomicSectionUpdate should be used instead.
 300 * The global function wfOutputHandler() was removed, use the its replacement
 301   MediaWiki\OutputHandler::handle() instead. The global function was only
 302   sometimes defined. Its replacement is always available via the autoloader.
 303 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 304   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 305   ::listSoftwareDefinedTags() instead.
 306 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 307   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 308 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 309 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 310 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 311   ResourceLoaderModule::getLessVars() to expose local variables instead of
 312   global ones.
 313 * As part of work to modernise user-generated content clean-up, a config option
 314   and some methods related to HTML validity were removed without deprecation.
 315   The public methods MWTidy::checkErrors() and the path through which it was
 316   called, TidyDriverBase::validate(), are removed, as are the testing methods
 317   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 318   The $wgValidateAllHtml configuration option is removed and will be ignored.
 319 * Execution of external programs using MediaWiki\Shell\Command now applies
 320   the RESTRICT_DEFAULT Firejail restriction by default.
 321 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 322   deprecated in 1.26, were removed.
 323 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 324   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 325
 326 === Deprecations in 1.31 ===
 327 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 328   RevisionRecord and its subclasses.
 329 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 330 * The global function wfCountDown is now deprecated in favor of
 331   Maintenance::countDown.
 332 * Several methods for returning lists of fields to select from the database
 333   have been deprecated in favor of similar methods that also return the tables
 334   to select from and the join conditions for those tables.
 335   * Block::selectFields() → Block::getQueryInfo()
 336   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 337   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 338   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 339   * LocalFile::getCacheFields() with a prefix no longer works
 340   * LocalFile::getLazyCacheFields() with a prefix no longer works
 341   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 342   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 343   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 344   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 345   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 346   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 347   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 348   * Revision::selectFields() → Revision::getQueryInfo()
 349   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 350   * User::selectFields() → User::getQueryInfo()
 351   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 352 * Revision::setUserIdAndName() was deprecated.
 353 * Access to TitleValue class properties was deprecated, the relevant getters
 354   should be used instead.
 355 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 356   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 357 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 358   Maintenance::fatalError() instead.
 359 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 360 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 361   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 362   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 363 * The following methods that get and set ParserOutput state are deprecated.
 364   Callers should use the new stateless $options parameter to
 365   ParserOutput::getText() instead.
 366   * ParserOptions::getEditSection()
 367   * ParserOptions::setEditSection()
 368   * ParserOutput::getEditSectionTokens()
 369   * ParserOutput::setEditSectionTokens()
 370   * ParserOutput::getTOCEnabled()
 371   * ParserOutput::setTOCEnabled()
 372   * OutputPage::enableSectionEditLinks()
 373   * OutputPage::sectionEditLinksEnabled()
 374   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 375     are also deprecated.
 376 * License::getLicenses has been deprecated; use License::getLines instead.
 377 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 378   Setting template variables by reference allowed violating the principle of
 379   data being immutable once added to the skin template. In practice, this method
 380   was not being used for that. Rather, setRef() existed as memory optimisation
 381   for PHP 4.
 382 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 383   favour of Skin::msg() parameters.
 384 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 385   wfMessage().
 386 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 387   'unwrap' transform to ParserOutput::getText() instead.
 388 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 389   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 390   used instead.
 391 * CommentStore::newKey is deprecated. Instead, get an instance from
 392   MediaWikiServices.
 393 * The following CommentStore methods have had their signatures changed to
 394   introduce a $key parameter, usage of the methods on instances retrieved from
 395   CommentStore::newKey will remain unchanged but deprecated:
 396   * CommentStore::getFields
 397   * CommentStore::getJoin
 398   * CommentStore::getComment
 399   * CommentStore::getCommentLegacy
 400   * CommentStore::insert
 401   * CommentStore::insertWithTemplate
 402 * The following methods in Title have been renamed, and the old ones are
 403   deprecated:
 404   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 405   * Title::isCssOrJsPage – use ::isSiteConfigPage
 406   * Title::isCssJsSubpage – use ::isUserConfigPage
 407   * Title::isCssSubpage – use ::isUserCssConfigPage
 408   * Title::isJsSubpage – use ::isUserJsConfigPage
 409 * The following methods related to caching of half-parsed HTML were deprecated:
 410   * Parser::serializeHalfParsedText()
 411   * Parser::unserializeHalfParsedText()
 412   * Parser::isValidHalfParsedText()
 413   * StripState::getSubState()
 414   * StripState::merge()
 415 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 416 * The type string for the parameter $lang of DateFormatter::getInstance is
 417   deprecated.
 418 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 419 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 420   used instead.
 421 * The function wfShellWikiCmd() has been deprecated, use
 422   MediaWiki\Shell::makeScriptCommand().
 423 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 424   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 425
 426 === Other changes in 1.31 ===
 427 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 428 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 429   continues at Grade A.
 430 * Multi-content-revision capability was introduced into the storage layer. See
 431   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 432 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 433   Links written using square brackets will get the class "text" not "free".
 434 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 435   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 436   headings, HTML list items, HTML table captions, HTML table headings, HTML
 437   table cells will not have this trimming behavior.
 438
 439 == Compatibility ==
 440 MediaWiki 1.31 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 441 supported, it is generally advised to use PHP 7.0.0 or later for long term
 442 support.
 443
 444 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 445 but support for them is somewhat less mature. There is experimental support for
 446 Oracle and Microsoft SQL Server.
 447
 448 The supported versions are:
 449
 450 * MySQL 5.5.8 or later
 451 * PostgreSQL 9.2 or later
 452 * SQLite 3.3.7 or later
 453 * Oracle 9.0.1 or later
 454 * Microsoft SQL Server 2005 (9.00.1399)
 455
 456 == Upgrading ==
 457 1.31 has several database changes since 1.30, and will not work without schema
 458 updates. Note that due to changes to some very large tables like the revision
 459 table, the schema update may take quite long (minutes on a medium sized site,
 460 many hours on a large site).
 461
 462 Don't forget to always back up your database before upgrading!
 463
 464 See the file UPGRADE for more detailed upgrade instructions, including
 465 important information when upgrading from versions prior to 1.11.
 466
 467 For notes on 1.30.x and older releases, see HISTORY.
 468
 469 == Online documentation ==
 470 Documentation for both end-users and site administrators is available on
 471 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 472 for pages that explicitly state that their contents are in the public domain):
 473
 474        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 475
 476 == Mailing list ==
 477 A mailing list is available for MediaWiki user support and discussion:
 478
 479        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 480
 481 A low-traffic announcements-only list is also available:
 482
 483        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 484
 485 It's highly recommended that you sign up for one of these lists if you're
 486 going to run a public MediaWiki, so you can be notified of security fixes.
 487
 488 == IRC help ==
 489 There's usually someone online in #mediawiki on irc.freenode.net.