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 * (T200595) Fix PHP 7.3 warnings of using "continue" in some scenarios instead
  13   of "break".
  14 * (T206979) Fix PHP 7.3 warnings of using "compact()" when some variables may
  15   not be set.
  16 * Fix PHP 7.3 warnings "preg_replace(): [...] invalid range in character class"
  17 * (T207540) Include IP address in "Login for $1 succeeded" log entry.
  18 * (T207541) Pass email address to mail().
  19 * (T207603) User JS may no longer be loaded with mime type text/javascript if
  20   there is no account associated with the username.
  21
  22 == MediaWiki 1.31.1 ==
  23
  24 This is a security and maintenance release of the MediaWiki 1.31 branch.
  25
  26 === Changes since MediaWiki 1.31.0 ===
  27 * (T169545, CVE-2018-0503) SECURITY: $wgRateLimits entry for 'user' overrides
  28   'newbie'.
  29 * (T194605, CVE-2018-0505) SECURITY: BotPasswords can bypass CentralAuth's
  30   account lock.
  31 * (T199029, CVE-2018-13258) SECURITY: Tarball was missing .htaccess files.
  32 * (T197229) Bundle Nuke extension, it was accidentally omitted.
  33 * (T193995) Fix undefined patchPath() method call in parser tests.
  34 * (T198687) Fix various selectFields methods to use the string 'NULL', not null.
  35 * Special:BotPasswords now requires reauthentication.
  36 * (T191608, T187638) Add 'logid' parameter to Special:Log.
  37 * (T193829) Indicate when a Bot Password needs reset.
  38 * (T198037) GitInfo: Don't try shelling out if it's disabled.
  39 * (T151415) Log email changes.
  40 * (T197206) Fix performance regression when multiple DB used without caching.
  41 * (T197030) PHPSessionHandler: Suppress headers warnings in initialize().
  42 * (T182377, T196793) Exif: Guard against uncountable tag values.
  43 * (T200861) Fix total breakage of SQLite web upgrade.
  44 * (T200864) Fix pingback over-reporting on non-MySQL databases
  45 * (T202550) Unbreak SpecialListusersHeaderForm and SpecialListusersHeader
  46   hooks.
  47
  48 === Changes since MediaWiki 1.31.0-rc.2 ===
  49 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  50 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  51 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  52 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  53 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  54 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  55 * (T196672) The mtime of extension.json files is now able to be zero
  56 * (T180403) Validate $length in padleft/padright parser functions.
  57 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
  58
  59 === Changes since MediaWiki 1.31.0-rc.0 ===
  60 * (T33223) Drop archive.ar_text and ar_flags.
  61 * Add default edit rate limit of 90 edits/minute for all users.
  62 * (T187645) Use codepoint as tiebreaker when getting first-letters in
  63   IcuCollation.
  64 * (T191947) Don't shell during the installer if shelling out is disabled.
  65 * (T194319) Improve duplicate config setting exception as part of extension
  66   registration.
  67 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
  68 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
  69 * Do not incorrectly hide namespace input field in the installer.
  70 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
  71
  72 === Important pre-upgrade notes for 1.31 ===
  73 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
  74   schema changes, and cannot have downtime to run migrateArchiveText.php and
  75   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
  76   to the ar_text and ar_flags columns of the archive table or make those
  77   columns nullable before upgrading to MediaWiki 1.31.
  78   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
  79 * The CologneBlue and Modern skins are no longer bundled with the tarball. You
  80   will need to remove the wfLoadSkin() calls from your LocalSettings.php or
  81   download them separately
  82   (<https://www.mediawiki.org/wiki/Special:SkinDistributor>).
  83
  84 === Configuration changes in 1.31 ===
  85 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
  86   a future version. The API is now considered to be stable, secure and
  87   essential.
  88 * $wgUsejQueryThree was removed, as it is now the default. This was documented
  89   as a temporary variable during the migration period, deprecated since 1.29.
  90 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
  91   possible for fallback images such as png.
  92 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
  93   have the right to mark things patrolled.
  94 * Wikis that contain imported revisions or CentralAuth global blocks should run
  95   maintenance/cleanupUsersWithNoId.php.
  96 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
  97   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
  98 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
  99   are not using the latest version of the Referrer Policy specification.
 100 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
 101   first step of migration to human-readable section IDs that will later result
 102   in 'html5' being the default mode.
 103 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
 104   as upstream is inactive and has no plans to move to PHP 7.
 105 * The old CategorizedRecentChanges feature, including its related configuration
 106   option $wgAllowCategorizedRecentChanges, has been removed.
 107 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
 108   for performance reasons, and installations with this setting will now work as
 109   if it was configured with 'any'.
 110 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
 111   rather than being off by default. If you wish to disable HTML tidying
 112   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
 113   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
 114 * $wgLogAutopatrol now defaults to false instead of true.
 115 * $wgValidateAllHtml was removed and will be ignored.
 116 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
 117   1.25 release notes for more information.
 118 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
 119   framework that it enables. Some extensions mistakenly used this to check
 120   whether any AJAX functionality at all should be enabled, further making this
 121   problematic to retain.
 122 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
 123   has been marked as experimental ever since it was introduced.
 124
 125 === New features in 1.31 ===
 126 * (T76554) User sub-pages named ….json are now protected in the same way that
 127   ….js and ….css pages are, so that configuration options can safely be placed
 128   there.
 129 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
 130   with parentheses for grouping.
 131 * As a first pass in standardizing dialog boxes across the MediaWiki product,
 132   Html class now provides helper methods for messageBox, successBox, errorBox
 133   and warningBox generation.
 134 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
 135   a format like "iw>Example".
 136 * (T20209) Linker (used on history pages, log pages, and so on) will display
 137   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
 138   [[iw:User:Example|iw>Example]].
 139 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
 140   users during an import.
 141 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 142   the ParserOutput::getText() post-cache transformations.
 143 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 144   initial page text for file uploads.
 145 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 146   hash value in the table of basic information.
 147 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 148   ParserOutput::getText() post-cache transformation. This may be disabled by
 149   passing 'deduplicateStyles' => false to that method.
 150 * The identity of the logged-in or IP "actor" for logged actions is being moved
 151   into a new actor table, with the rows in tables such as revision and logging
 152   referring to the actor ID instead of storing the user ID and name/IP in
 153   every row.
 154   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 155     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 156     soon as any necessary extensions are updated.
 157   * Most code accessing rows for logged actions from the database should use
 158     the relevant getQueryInfo() methods to get the information needed to build
 159     the SQL query. The ActorMigration class may also be used to get feature
 160     -flagged information needed to access actor-related fields during the
 161     migration period.
 162 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 163   section without having to roll back the whole transaction.
 164 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 165   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 166   transaction on failure.
 167 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 168 * The CLI installer (maintenance/install.php) learned to detect and include
 169   extensions. Pass --with-extensions to enable that feature.
 170 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 171   "1" for manually patrolled and "2" for autopatrolled actions.
 172 * Extensions can now set their type to "editor" if they provide an editor or
 173   enhance the editing experience.
 174 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 175   property in extension.json. See the documentation at
 176   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 177   for more details and an example.
 178 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 179   discussion pages) now have a tooltip to indicate state, not just colour.
 180
 181 === External library changes in 1.31 ===
 182 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 183   suggested to required. These packages now must be installed via composer
 184   and not via PEAR itself.
 185
 186 ==== Upgraded external libraries ====
 187 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 188 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 189 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 190 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 191 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 192 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 193 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 194 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 195 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 196 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 197 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 198
 199 ==== New external libraries ====
 200 * Added wikimedia/object-factory 1.0.0
 201
 202 ==== Removed and replaced external libraries ====
 203 * (T17845) The deprecated 'jquery.badge' module was removed.
 204 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 205   text-overflow property instead.
 206 * The deprecated 'jquery.placeholder' module was removed.
 207 * The deprecated 'jquery.appear' module was removed. Use the
 208   'mediawiki.viewport' module instead.
 209 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 210
 211 === Bug fixes in 1.31 ===
 212 * (T90902) Non-breaking space in header ID breaks anchor.
 213 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 214   space.
 215 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 216   links is now stripped rather than leaving blank lines in odd places.
 217 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 218 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 219
 220 === Action API changes in 1.31 ===
 221 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 222   removed. It has never made a difference in the output, the name was always
 223   returned regardless.
 224 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 225   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 226   'watchlist' instead.
 227
 228 === Action API internal changes in 1.31 ===
 229 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 230 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 231 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 232
 233 === Languages updated in 1.31 ===
 234 MediaWiki supports over 350 languages. Many localisations are updated
 235 regularly. Below only new and removed languages are listed, as well as
 236 changes to languages because of Phabricator reports.
 237
 238 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 239 * (T182305) New language support: Nyungar (nys).
 240 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 241 * (T186635) New language support: Guianan Creole (gcr).
 242 * (T186647) New language support: Kumyk [къумукъ] (kum).
 243 * (T187750) New language support: Spanish formal address (es-formal).
 244 * (T187824) New language support: Hungarian formal address (hu-formal).
 245 * (T189127) New language support: Gorontalo (gor).
 246
 247 === Breaking changes in 1.31 ===
 248 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 249 * The OutputPage class constructor now requires a context parameter.
 250   Instantiating without context was deprecated in 1.18.
 251 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 252 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 253   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 254 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 255   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 256 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 257   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 258 * The deprecated MW_DIFF_VERSION constant was removed.
 259   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 260 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 261   no access restriction has been removed.
 262 * The Block class will no longer accept usable-but-missing usernames for
 263   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 264   locally or use a new interwiki-format username like "iw>Example".
 265 * The following methods and constants from the WatchedItem class, which were
 266   deprecated in 1.27, have been removed:
 267   * WatchedItem::getTitle()
 268   * WatchedItem::fromUserTitle()
 269   * WatchedItem::addWatch()
 270   * WatchedItem::removeWatch()
 271   * WatchedItem::isWatched()
 272   * WatchedItem::duplicateEntries()
 273   * WatchedItem::IGNORE_USER_RIGHTS
 274   * WatchedItem::CHECK_USER_RIGHTS
 275   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 276 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 277   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 278   variable, has been deprecated since 1.27 and was removed as well.
 279 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 280   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 281   variable, has been deprecated since 1.27 and was removed as well.
 282 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 283   HtmlFormatter\HtmlFormatter class should be used instead.
 284 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 285   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 286   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 287 * The following properties of PreparedEdit were deprecated in 1.21 and have
 288   been removed:
 289   * PreparedEdit->newText
 290   * PreparedEdit->oldText
 291   * PreparedEdit->pst
 292 * ParserOutput objects which are generated using a non-default value for
 293   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 294   cache.
 295 * The following deprecated methods from the OutputPage class have been removed:
 296   * OutputPage::addExtensionStyle(); deprecated in 1.27
 297   * OutputPage::getExtStyle(); deprecated in 1.27
 298   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 299   * OutputPage::setSquidMaxage(); deprecated in 1.27
 300   * OutputPage::readOnlyPage(); deprecated in 1.25
 301   * OutputPage::rateLimited(); deprecated in 1.25
 302   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 303     through the above and with no known uses, was removed.
 304 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 305 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 306   were removed:
 307   * $isCssJsSubpage — use ::isUserConfigPage()
 308   * $isCssSubpage — use ::isUserCssConfigPage()
 309   * $isJsSubpage — use ::isUserJsConfigPage()
 310   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 311   * ::getSummaryInput() – use ::getSummaryInputWidget()
 312   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 313   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 314       ::getCheckboxesDefinition()
 315   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 316       ::getCheckboxesDefinition()
 317 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 318 * In User, the cookie-related methods which were wrappers for the functions on
 319   the response object, and were deprecated in 1.27, have been removed:
 320   * ::setCookie()
 321   * ::clearCookie()
 322   * ::setExtendedLoginCookie()
 323   Note that User::setCookies() remains, and is not deprecated.
 324 * Also in User, some auth-related methods which were deprecated in 1.27 have
 325   been removed:
 326   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 327   * ::getPasswordFactory() – create a PasswordFactory directly
 328   * ::passwordChangeInputAttribs()
 329 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 330   been removed.
 331 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 332   use ::getNames() instead.
 333 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 334   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 335 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 336   Wikimedia\base_convert() directly.
 337 * Calling Database::begin() explicitly during an implicit transaction or when
 338   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 339   for an implicit transaction also results in an exception. Previously these
 340   were logged as errors. The startAtomic() and endAtomic() methods, or
 341   AtomicSectionUpdate should be used instead.
 342 * The global function wfOutputHandler() was removed, use the its replacement
 343   MediaWiki\OutputHandler::handle() instead. The global function was only
 344   sometimes defined. Its replacement is always available via the autoloader.
 345 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 346   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 347   ::listSoftwareDefinedTags() instead.
 348 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 349   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 350 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 351 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 352 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 353   ResourceLoaderModule::getLessVars() to expose local variables instead of
 354   global ones.
 355 * As part of work to modernise user-generated content clean-up, a config option
 356   and some methods related to HTML validity were removed without deprecation.
 357   The public methods MWTidy::checkErrors() and the path through which it was
 358   called, TidyDriverBase::validate(), are removed, as are the testing methods
 359   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 360   The $wgValidateAllHtml configuration option is removed and will be ignored.
 361 * Execution of external programs using MediaWiki\Shell\Command now applies
 362   the RESTRICT_DEFAULT Firejail restriction by default.
 363 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 364   deprecated in 1.26, were removed.
 365 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 366   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 367
 368 === Deprecations in 1.31 ===
 369 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 370   RevisionRecord and its subclasses.
 371 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 372 * The global function wfCountDown is now deprecated in favor of
 373   Maintenance::countDown.
 374 * Several methods for returning lists of fields to select from the database
 375   have been deprecated in favor of similar methods that also return the tables
 376   to select from and the join conditions for those tables.
 377   * Block::selectFields() → Block::getQueryInfo()
 378   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 379   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 380   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 381   * LocalFile::getCacheFields() with a prefix no longer works
 382   * LocalFile::getLazyCacheFields() with a prefix no longer works
 383   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 384   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 385   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 386   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 387   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 388   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 389   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 390   * Revision::selectFields() → Revision::getQueryInfo()
 391   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 392   * User::selectFields() → User::getQueryInfo()
 393   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 394 * Revision::setUserIdAndName() was deprecated.
 395 * Access to TitleValue class properties was deprecated, the relevant getters
 396   should be used instead.
 397 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 398   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 399 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 400   Maintenance::fatalError() instead.
 401 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 402 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 403   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 404   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 405 * The following methods that get and set ParserOutput state are deprecated.
 406   Callers should use the new stateless $options parameter to
 407   ParserOutput::getText() instead.
 408   * ParserOptions::getEditSection()
 409   * ParserOptions::setEditSection()
 410   * ParserOutput::getEditSectionTokens()
 411   * ParserOutput::setEditSectionTokens()
 412   * ParserOutput::getTOCEnabled()
 413   * ParserOutput::setTOCEnabled()
 414   * OutputPage::enableSectionEditLinks()
 415   * OutputPage::sectionEditLinksEnabled()
 416   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 417     are also deprecated.
 418 * License::getLicenses has been deprecated; use License::getLines instead.
 419 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 420   Setting template variables by reference allowed violating the principle of
 421   data being immutable once added to the skin template. In practice, this method
 422   was not being used for that. Rather, setRef() existed as memory optimisation
 423   for PHP 4.
 424 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 425   favour of Skin::msg() parameters.
 426 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 427   wfMessage().
 428 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 429   'unwrap' transform to ParserOutput::getText() instead.
 430 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 431   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 432   used instead.
 433 * CommentStore::newKey is deprecated. Instead, get an instance from
 434   MediaWikiServices.
 435 * The following CommentStore methods have had their signatures changed to
 436   introduce a $key parameter, usage of the methods on instances retrieved from
 437   CommentStore::newKey will remain unchanged but deprecated:
 438   * CommentStore::getFields
 439   * CommentStore::getJoin
 440   * CommentStore::getComment
 441   * CommentStore::getCommentLegacy
 442   * CommentStore::insert
 443   * CommentStore::insertWithTemplate
 444 * The following methods in Title have been renamed, and the old ones are
 445   deprecated:
 446   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 447   * Title::isCssOrJsPage – use ::isSiteConfigPage
 448   * Title::isCssJsSubpage – use ::isUserConfigPage
 449   * Title::isCssSubpage – use ::isUserCssConfigPage
 450   * Title::isJsSubpage – use ::isUserJsConfigPage
 451 * The following methods related to caching of half-parsed HTML were deprecated:
 452   * Parser::serializeHalfParsedText()
 453   * Parser::unserializeHalfParsedText()
 454   * Parser::isValidHalfParsedText()
 455   * StripState::getSubState()
 456   * StripState::merge()
 457 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 458 * The type string for the parameter $lang of DateFormatter::getInstance is
 459   deprecated.
 460 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 461 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 462   used instead.
 463 * The function wfShellWikiCmd() has been deprecated, use
 464   MediaWiki\Shell::makeScriptCommand().
 465 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 466   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 467
 468 === Other changes in 1.31 ===
 469 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 470 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 471   continues at Grade A.
 472 * Multi-content-revision capability was introduced into the storage layer. See
 473   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 474 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 475   Links written using square brackets will get the class "text" not "free".
 476 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 477   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 478   headings, HTML list items, HTML table captions, HTML table headings, HTML
 479   table cells will not have this trimming behavior.
 480
 481 == Compatibility ==
 482 MediaWiki 1.31 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 483 supported, it is generally advised to use PHP 7.0.0 or later for long term
 484 support.
 485
 486 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 487 but support for them is somewhat less mature. There is experimental support for
 488 Oracle and Microsoft SQL Server.
 489
 490 The supported versions are:
 491
 492 * MySQL 5.5.8 or later
 493 * PostgreSQL 9.2 or later
 494 * SQLite 3.3.7 or later
 495 * Oracle 9.0.1 or later
 496 * Microsoft SQL Server 2005 (9.00.1399)
 497
 498 == Upgrading ==
 499 1.31 has several database changes since 1.30, and will not work without schema
 500 updates. Note that due to changes to some very large tables like the revision
 501 table, the schema update may take quite long (minutes on a medium sized site,
 502 many hours on a large site).
 503
 504 Don't forget to always back up your database before upgrading!
 505
 506 See the file UPGRADE for more detailed upgrade instructions, including
 507 important information when upgrading from versions prior to 1.11.
 508
 509 For notes on 1.30.x and older releases, see HISTORY.
 510
 511 == Online documentation ==
 512 Documentation for both end-users and site administrators is available on
 513 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 514 for pages that explicitly state that their contents are in the public domain):
 515
 516        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 517
 518 == Mailing list ==
 519 A mailing list is available for MediaWiki user support and discussion:
 520
 521        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 522
 523 A low-traffic announcements-only list is also available:
 524
 525        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 526
 527 It's highly recommended that you sign up for one of these lists if you're
 528 going to run a public MediaWiki, so you can be notified of security fixes.
 529
 530 == IRC help ==
 531 There's usually someone online in #mediawiki on irc.freenode.net.