RELEASE-NOTES-1.31

   1 == MediaWiki 1.31.2 ==
   2
   3 THIS IS NOT A RELEASE YET
   4
   5 === Changes since MediaWiki 1.31.1 ===
   6 * (T204729) WatchedItemStore::countVisitingWatchersMultiple() shouldn't query all
   7   titles when asked for none
   8 * (T205967) Fix syntax error typo in postgres database upgrade file.
   9 * (T200254) Add pear/Net_SMTP 1.7.3 to composer dependencies.
  10 * (T206765) Load installer i18n when running update.php.
  11 * (T109121) Remove deprecated pear/mail_mime-decode from composer suggested libraries.
  12
  13 == MediaWiki 1.31.1 ==
  14
  15 This is a security and maintenance release of the MediaWiki 1.31 branch.
  16
  17 === Changes since MediaWiki 1.31.0 ===
  18 * (T169545, CVE-2018-0503) SECURITY: $wgRateLimits entry for 'user' overrides
  19   'newbie'.
  20 * (T194605, CVE-2018-0505) SECURITY: BotPasswords can bypass CentralAuth's
  21   account lock.
  22 * (T199029, CVE-2018-13258) SECURITY: Tarball was missing .htaccess files.
  23 * (T197229) Bundle Nuke extension, it was accidentally omitted.
  24 * (T193995) Fix undefined patchPath() method call in parser tests.
  25 * (T198687) Fix various selectFields methods to use the string 'NULL', not null.
  26 * Special:BotPasswords now requires reauthentication.
  27 * (T191608, T187638) Add 'logid' parameter to Special:Log.
  28 * (T193829) Indicate when a Bot Password needs reset.
  29 * (T198037) GitInfo: Don't try shelling out if it's disabled.
  30 * (T151415) Log email changes.
  31 * (T197206) Fix performance regression when multiple DB used without caching.
  32 * (T197030) PHPSessionHandler: Suppress headers warnings in initialize().
  33 * (T182377, T196793) Exif: Guard against uncountable tag values.
  34 * (T200861) Fix total breakage of SQLite web upgrade.
  35 * (T200864) Fix pingback over-reporting on non-MySQL databases
  36 * (T202550) Unbreak SpecialListusersHeaderForm and SpecialListusersHeader
  37   hooks.
  38
  39 === Changes since MediaWiki 1.31.0-rc.2 ===
  40 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  41 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  42 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  43 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  44 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  45 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  46 * (T196672) The mtime of extension.json files is now able to be zero
  47 * (T180403) Validate $length in padleft/padright parser functions.
  48 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
  49
  50 === Changes since MediaWiki 1.31.0-rc.0 ===
  51 * (T33223) Drop archive.ar_text and ar_flags.
  52 * Add default edit rate limit of 90 edits/minute for all users.
  53 * (T187645) Use codepoint as tiebreaker when getting first-letters in
  54   IcuCollation.
  55 * (T191947) Don't shell during the installer if shelling out is disabled.
  56 * (T194319) Improve duplicate config setting exception as part of extension
  57   registration.
  58 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
  59 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
  60 * Do not incorrectly hide namespace input field in the installer.
  61 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
  62
  63 === Important pre-upgrade notes for 1.31 ===
  64 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
  65   schema changes, and cannot have downtime to run migrateArchiveText.php and
  66   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
  67   to the ar_text and ar_flags columns of the archive table or make those
  68   columns nullable before upgrading to MediaWiki 1.31.
  69   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
  70 * The CologneBlue and Modern skins are no longer bundled with the tarball. You
  71   will need to remove the wfLoadSkin() calls from your LocalSettings.php or
  72   download them separately
  73   (<https://www.mediawiki.org/wiki/Special:SkinDistributor>).
  74
  75 === Configuration changes in 1.31 ===
  76 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
  77   a future version. The API is now considered to be stable, secure and
  78   essential.
  79 * $wgUsejQueryThree was removed, as it is now the default. This was documented
  80   as a temporary variable during the migration period, deprecated since 1.29.
  81 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
  82   possible for fallback images such as png.
  83 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
  84   have the right to mark things patrolled.
  85 * Wikis that contain imported revisions or CentralAuth global blocks should run
  86   maintenance/cleanupUsersWithNoId.php.
  87 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
  88   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
  89 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
  90   are not using the latest version of the Referrer Policy specification.
  91 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
  92   first step of migration to human-readable section IDs that will later result
  93   in 'html5' being the default mode.
  94 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
  95   as upstream is inactive and has no plans to move to PHP 7.
  96 * The old CategorizedRecentChanges feature, including its related configuration
  97   option $wgAllowCategorizedRecentChanges, has been removed.
  98 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
  99   for performance reasons, and installations with this setting will now work as
 100   if it was configured with 'any'.
 101 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
 102   rather than being off by default. If you wish to disable HTML tidying
 103   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
 104   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
 105 * $wgLogAutopatrol now defaults to false instead of true.
 106 * $wgValidateAllHtml was removed and will be ignored.
 107 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
 108   1.25 release notes for more information.
 109 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
 110   framework that it enables. Some extensions mistakenly used this to check
 111   whether any AJAX functionality at all should be enabled, further making this
 112   problematic to retain.
 113 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
 114   has been marked as experimental ever since it was introduced.
 115
 116 === New features in 1.31 ===
 117 * (T76554) User sub-pages named ….json are now protected in the same way that
 118   ….js and ….css pages are, so that configuration options can safely be placed
 119   there.
 120 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
 121   with parentheses for grouping.
 122 * As a first pass in standardizing dialog boxes across the MediaWiki product,
 123   Html class now provides helper methods for messageBox, successBox, errorBox
 124   and warningBox generation.
 125 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
 126   a format like "iw>Example".
 127 * (T20209) Linker (used on history pages, log pages, and so on) will display
 128   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
 129   [[iw:User:Example|iw>Example]].
 130 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
 131   users during an import.
 132 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 133   the ParserOutput::getText() post-cache transformations.
 134 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 135   initial page text for file uploads.
 136 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 137   hash value in the table of basic information.
 138 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 139   ParserOutput::getText() post-cache transformation. This may be disabled by
 140   passing 'deduplicateStyles' => false to that method.
 141 * The identity of the logged-in or IP "actor" for logged actions is being moved
 142   into a new actor table, with the rows in tables such as revision and logging
 143   referring to the actor ID instead of storing the user ID and name/IP in
 144   every row.
 145   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 146     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 147     soon as any necessary extensions are updated.
 148   * Most code accessing rows for logged actions from the database should use
 149     the relevant getQueryInfo() methods to get the information needed to build
 150     the SQL query. The ActorMigration class may also be used to get feature
 151     -flagged information needed to access actor-related fields during the
 152     migration period.
 153 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 154   section without having to roll back the whole transaction.
 155 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 156   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 157   transaction on failure.
 158 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 159 * The CLI installer (maintenance/install.php) learned to detect and include
 160   extensions. Pass --with-extensions to enable that feature.
 161 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 162   "1" for manually patrolled and "2" for autopatrolled actions.
 163 * Extensions can now set their type to "editor" if they provide an editor or
 164   enhance the editing experience.
 165 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 166   property in extension.json. See the documentation at
 167   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 168   for more details and an example.
 169 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 170   discussion pages) now have a tooltip to indicate state, not just colour.
 171
 172 === External library changes in 1.31 ===
 173 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 174   suggested to required. These packages now must be installed via composer
 175   and not via PEAR itself.
 176
 177 ==== Upgraded external libraries ====
 178 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 179 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 180 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 181 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 182 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 183 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 184 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 185 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 186 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 187 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 188 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 189
 190 ==== New external libraries ====
 191 * Added wikimedia/object-factory 1.0.0
 192
 193 ==== Removed and replaced external libraries ====
 194 * (T17845) The deprecated 'jquery.badge' module was removed.
 195 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 196   text-overflow property instead.
 197 * The deprecated 'jquery.placeholder' module was removed.
 198 * The deprecated 'jquery.appear' module was removed. Use the
 199   'mediawiki.viewport' module instead.
 200 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 201
 202 === Bug fixes in 1.31 ===
 203 * (T90902) Non-breaking space in header ID breaks anchor.
 204 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 205   space.
 206 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 207   links is now stripped rather than leaving blank lines in odd places.
 208 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 209 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 210
 211 === Action API changes in 1.31 ===
 212 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 213   removed. It has never made a difference in the output, the name was always
 214   returned regardless.
 215 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 216   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 217   'watchlist' instead.
 218
 219 === Action API internal changes in 1.31 ===
 220 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 221 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 222 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 223
 224 === Languages updated in 1.31 ===
 225 MediaWiki supports over 350 languages. Many localisations are updated
 226 regularly. Below only new and removed languages are listed, as well as
 227 changes to languages because of Phabricator reports.
 228
 229 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 230 * (T182305) New language support: Nyungar (nys).
 231 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 232 * (T186635) New language support: Guianan Creole (gcr).
 233 * (T186647) New language support: Kumyk [къумукъ] (kum).
 234 * (T187750) New language support: Spanish formal address (es-formal).
 235 * (T187824) New language support: Hungarian formal address (hu-formal).
 236 * (T189127) New language support: Gorontalo (gor).
 237
 238 === Breaking changes in 1.31 ===
 239 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 240 * The OutputPage class constructor now requires a context parameter.
 241   Instantiating without context was deprecated in 1.18.
 242 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 243 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 244   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 245 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 246   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 247 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 248   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 249 * The deprecated MW_DIFF_VERSION constant was removed.
 250   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 251 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 252   no access restriction has been removed.
 253 * The Block class will no longer accept usable-but-missing usernames for
 254   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 255   locally or use a new interwiki-format username like "iw>Example".
 256 * The following methods and constants from the WatchedItem class, which were
 257   deprecated in 1.27, have been removed:
 258   * WatchedItem::getTitle()
 259   * WatchedItem::fromUserTitle()
 260   * WatchedItem::addWatch()
 261   * WatchedItem::removeWatch()
 262   * WatchedItem::isWatched()
 263   * WatchedItem::duplicateEntries()
 264   * WatchedItem::IGNORE_USER_RIGHTS
 265   * WatchedItem::CHECK_USER_RIGHTS
 266   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 267 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 268   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 269   variable, has been deprecated since 1.27 and was removed as well.
 270 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 271   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 272   variable, has been deprecated since 1.27 and was removed as well.
 273 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 274   HtmlFormatter\HtmlFormatter class should be used instead.
 275 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 276   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 277   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 278 * The following properties of PreparedEdit were deprecated in 1.21 and have
 279   been removed:
 280   * PreparedEdit->newText
 281   * PreparedEdit->oldText
 282   * PreparedEdit->pst
 283 * ParserOutput objects which are generated using a non-default value for
 284   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 285   cache.
 286 * The following deprecated methods from the OutputPage class have been removed:
 287   * OutputPage::addExtensionStyle(); deprecated in 1.27
 288   * OutputPage::getExtStyle(); deprecated in 1.27
 289   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 290   * OutputPage::setSquidMaxage(); deprecated in 1.27
 291   * OutputPage::readOnlyPage(); deprecated in 1.25
 292   * OutputPage::rateLimited(); deprecated in 1.25
 293   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 294     through the above and with no known uses, was removed.
 295 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 296 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 297   were removed:
 298   * $isCssJsSubpage — use ::isUserConfigPage()
 299   * $isCssSubpage — use ::isUserCssConfigPage()
 300   * $isJsSubpage — use ::isUserJsConfigPage()
 301   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 302   * ::getSummaryInput() – use ::getSummaryInputWidget()
 303   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 304   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 305       ::getCheckboxesDefinition()
 306   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 307       ::getCheckboxesDefinition()
 308 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 309 * In User, the cookie-related methods which were wrappers for the functions on
 310   the response object, and were deprecated in 1.27, have been removed:
 311   * ::setCookie()
 312   * ::clearCookie()
 313   * ::setExtendedLoginCookie()
 314   Note that User::setCookies() remains, and is not deprecated.
 315 * Also in User, some auth-related methods which were deprecated in 1.27 have
 316   been removed:
 317   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 318   * ::getPasswordFactory() – create a PasswordFactory directly
 319   * ::passwordChangeInputAttribs()
 320 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 321   been removed.
 322 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 323   use ::getNames() instead.
 324 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 325   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 326 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 327   Wikimedia\base_convert() directly.
 328 * Calling Database::begin() explicitly during an implicit transaction or when
 329   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 330   for an implicit transaction also results in an exception. Previously these
 331   were logged as errors. The startAtomic() and endAtomic() methods, or
 332   AtomicSectionUpdate should be used instead.
 333 * The global function wfOutputHandler() was removed, use the its replacement
 334   MediaWiki\OutputHandler::handle() instead. The global function was only
 335   sometimes defined. Its replacement is always available via the autoloader.
 336 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 337   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 338   ::listSoftwareDefinedTags() instead.
 339 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 340   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 341 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 342 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 343 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 344   ResourceLoaderModule::getLessVars() to expose local variables instead of
 345   global ones.
 346 * As part of work to modernise user-generated content clean-up, a config option
 347   and some methods related to HTML validity were removed without deprecation.
 348   The public methods MWTidy::checkErrors() and the path through which it was
 349   called, TidyDriverBase::validate(), are removed, as are the testing methods
 350   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 351   The $wgValidateAllHtml configuration option is removed and will be ignored.
 352 * Execution of external programs using MediaWiki\Shell\Command now applies
 353   the RESTRICT_DEFAULT Firejail restriction by default.
 354 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 355   deprecated in 1.26, were removed.
 356 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 357   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 358
 359 === Deprecations in 1.31 ===
 360 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 361   RevisionRecord and its subclasses.
 362 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 363 * The global function wfCountDown is now deprecated in favor of
 364   Maintenance::countDown.
 365 * Several methods for returning lists of fields to select from the database
 366   have been deprecated in favor of similar methods that also return the tables
 367   to select from and the join conditions for those tables.
 368   * Block::selectFields() → Block::getQueryInfo()
 369   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 370   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 371   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 372   * LocalFile::getCacheFields() with a prefix no longer works
 373   * LocalFile::getLazyCacheFields() with a prefix no longer works
 374   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 375   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 376   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 377   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 378   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 379   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 380   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 381   * Revision::selectFields() → Revision::getQueryInfo()
 382   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 383   * User::selectFields() → User::getQueryInfo()
 384   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 385 * Revision::setUserIdAndName() was deprecated.
 386 * Access to TitleValue class properties was deprecated, the relevant getters
 387   should be used instead.
 388 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 389   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 390 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 391   Maintenance::fatalError() instead.
 392 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 393 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 394   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 395   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 396 * The following methods that get and set ParserOutput state are deprecated.
 397   Callers should use the new stateless $options parameter to
 398   ParserOutput::getText() instead.
 399   * ParserOptions::getEditSection()
 400   * ParserOptions::setEditSection()
 401   * ParserOutput::getEditSectionTokens()
 402   * ParserOutput::setEditSectionTokens()
 403   * ParserOutput::getTOCEnabled()
 404   * ParserOutput::setTOCEnabled()
 405   * OutputPage::enableSectionEditLinks()
 406   * OutputPage::sectionEditLinksEnabled()
 407   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 408     are also deprecated.
 409 * License::getLicenses has been deprecated; use License::getLines instead.
 410 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 411   Setting template variables by reference allowed violating the principle of
 412   data being immutable once added to the skin template. In practice, this method
 413   was not being used for that. Rather, setRef() existed as memory optimisation
 414   for PHP 4.
 415 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 416   favour of Skin::msg() parameters.
 417 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 418   wfMessage().
 419 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 420   'unwrap' transform to ParserOutput::getText() instead.
 421 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 422   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 423   used instead.
 424 * CommentStore::newKey is deprecated. Instead, get an instance from
 425   MediaWikiServices.
 426 * The following CommentStore methods have had their signatures changed to
 427   introduce a $key parameter, usage of the methods on instances retrieved from
 428   CommentStore::newKey will remain unchanged but deprecated:
 429   * CommentStore::getFields
 430   * CommentStore::getJoin
 431   * CommentStore::getComment
 432   * CommentStore::getCommentLegacy
 433   * CommentStore::insert
 434   * CommentStore::insertWithTemplate
 435 * The following methods in Title have been renamed, and the old ones are
 436   deprecated:
 437   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 438   * Title::isCssOrJsPage – use ::isSiteConfigPage
 439   * Title::isCssJsSubpage – use ::isUserConfigPage
 440   * Title::isCssSubpage – use ::isUserCssConfigPage
 441   * Title::isJsSubpage – use ::isUserJsConfigPage
 442 * The following methods related to caching of half-parsed HTML were deprecated:
 443   * Parser::serializeHalfParsedText()
 444   * Parser::unserializeHalfParsedText()
 445   * Parser::isValidHalfParsedText()
 446   * StripState::getSubState()
 447   * StripState::merge()
 448 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 449 * The type string for the parameter $lang of DateFormatter::getInstance is
 450   deprecated.
 451 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 452 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 453   used instead.
 454 * The function wfShellWikiCmd() has been deprecated, use
 455   MediaWiki\Shell::makeScriptCommand().
 456 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 457   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 458
 459 === Other changes in 1.31 ===
 460 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 461 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 462   continues at Grade A.
 463 * Multi-content-revision capability was introduced into the storage layer. See
 464   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 465 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 466   Links written using square brackets will get the class "text" not "free".
 467 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 468   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 469   headings, HTML list items, HTML table captions, HTML table headings, HTML
 470   table cells will not have this trimming behavior.
 471
 472 == Compatibility ==
 473 MediaWiki 1.31 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 474 supported, it is generally advised to use PHP 7.0.0 or later for long term
 475 support.
 476
 477 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 478 but support for them is somewhat less mature. There is experimental support for
 479 Oracle and Microsoft SQL Server.
 480
 481 The supported versions are:
 482
 483 * MySQL 5.5.8 or later
 484 * PostgreSQL 9.2 or later
 485 * SQLite 3.3.7 or later
 486 * Oracle 9.0.1 or later
 487 * Microsoft SQL Server 2005 (9.00.1399)
 488
 489 == Upgrading ==
 490 1.31 has several database changes since 1.30, and will not work without schema
 491 updates. Note that due to changes to some very large tables like the revision
 492 table, the schema update may take quite long (minutes on a medium sized site,
 493 many hours on a large site).
 494
 495 Don't forget to always back up your database before upgrading!
 496
 497 See the file UPGRADE for more detailed upgrade instructions, including
 498 important information when upgrading from versions prior to 1.11.
 499
 500 For notes on 1.30.x and older releases, see HISTORY.
 501
 502 == Online documentation ==
 503 Documentation for both end-users and site administrators is available on
 504 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 505 for pages that explicitly state that their contents are in the public domain):
 506
 507        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 508
 509 == Mailing list ==
 510 A mailing list is available for MediaWiki user support and discussion:
 511
 512        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 513
 514 A low-traffic announcements-only list is also available:
 515
 516        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 517
 518 It's highly recommended that you sign up for one of these lists if you're
 519 going to run a public MediaWiki, so you can be notified of security fixes.
 520
 521 == IRC help ==
 522 There's usually someone online in #mediawiki on irc.freenode.net.