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