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   [Also in the bundled composer /vendor directory.]
  13 * Various PHP 7.2 and 7.3 compatibility fixes:
  14   * (T200595, T206974) Fix PHP 7.3 warnings of using "continue" in some scenarios instead
  15     of "break".
  16     * (T206976, T206977) Also in the bundled LocalisationUpdate and ParserFunctions extensions.
  17   * (T206979) Fix PHP 7.3 warnings of using "compact()" when some variables may
  18     not be set.
  19   * (T215632) FormatMetadata and UploadStash regexes fixed to be PHP 7.3-compatible.
  20   * Avoid PHP 7.2 warnings in DBConRefTest about count() on non-Countable
  21   * Suppress "Headers already sent" in PHP 7.2 too
  22   * (T206476) Output only to stderr in unit tests
  23   * (T207112) Add session_write_close() calls to SessionManager tests
  24   * oyejorge/less.php replaced with our fork wikimedia/less.php
  25   * (T209756) Updated wikimedia/ip-set from 1.2.0 to 1.3.0.
  26   * (T213489) Avoid session double-start in Setup.php.
  27 * (T207540) Include IP address in "Login for $1 succeeded" log entry.
  28 * (T201781) Database: Allow selectFieldValues() to accept SQL fragments
  29 * (T205765) installer: Don't link to the obsolete "Extension Matrix" page
  30 * (T206013) Update ImportableUploadRevisionImporter for interwiki usernames
  31 * (T207541) Pass an email address, not a MailAddress, to mail().
  32 * (T207603) User JS may no longer be loaded with mime type text/javascript if
  33   there is no account associated with the username.
  34 * (T112937, T113042) Do not allow loading pages raw with a text/javascript MIME
  35   type if non-admins can edit the page.
  36 * (T17491) <ins>/<del> elements can be phrasing or flow
  37 * (T200827) RemexCompatMunger: Don't call endTag() in case B/b
  38 * (T207088) Upgrade wikimedia/remex-html to 2.0.1
  39   [Also in the bundled composer /vendor directory.]
  40 * (T194052) Updated wikimedia/base-convert from 1.0.1 to 2.0.0.
  41   [Also in the bundled composer /vendor directory.]
  42 * (T199494) Fix notices in maintenance/removeUnusuedAccounts.php
  43 * Require ext-fileinfo in composer.json, per PHPVersionCheck
  44 * (T176390) Bundled LocalisationUpdate extension: Handle exceptions from GitHubFetcher
  45 * (T208255) Completion search should not change the search query
  46 * (T209870) Fix SQL syntax error in MS-SQL initialisation file for new wikis
  47 * (T185049) LogFormatter: Fail softer when trying to link an invalid titles
  48 * (T210998) Properly set $wgLanguageCode in the generated LocalSettings.php
  49   if --lang is used with the command-line installer (install.php).
  50 * Fix addition of ug_expiry column to user_groups table on MSSQL.
  51 * (T204767) Add join conditions to ActiveUsersPager
  52 * (T210621) User: Bypass repeatable-read when creating an actor_id.
  53 * (T204531) rdbms: reduce LoadBalancer replication log spam.
  54 * (T195525) Fix db error outage page.
  55 * (T208871) The hard-coded Google search form on the database error page was
  56   removed.
  57 * (T209885) Prevent populateSearchIndex.php from breaking once actor migration
  58   has been started.
  59 * (T216968) Return pageid as int in both list=iwbacklinks and list=langbacklinks.
  60 * (T215169) Fix for Database::update() with IGNORE option fails on PostgreSQL.
  61 * (T204423) Backport support for hyphenated DB names in JobQueueGroup.
  62 * (T199474) Fix typo in rebuildrecentchanges.php resulting in rogue flags.
  63 * (T218608) Fix an issue that prevents Extension:OAuth working when
  64   $wgBlockDisablesLogin is true.
  65
  66 == MediaWiki 1.31.1 ==
  67
  68 This is a security and maintenance release of the MediaWiki 1.31 branch.
  69
  70 === Changes since MediaWiki 1.31.0 ===
  71 * (T169545, CVE-2018-0503) SECURITY: $wgRateLimits entry for 'user' overrides
  72   'newbie'.
  73 * (T194605, CVE-2018-0505) SECURITY: BotPasswords can bypass CentralAuth's
  74   account lock.
  75 * (T199029, CVE-2018-13258) SECURITY: Tarball was missing .htaccess files.
  76 * (T197229) Bundle Nuke extension, it was accidentally omitted.
  77 * (T193995) Fix undefined patchPath() method call in parser tests.
  78 * (T198687) Fix various selectFields methods to use the string 'NULL', not null.
  79 * Special:BotPasswords now requires reauthentication.
  80 * (T191608, T187638) Add 'logid' parameter to Special:Log.
  81 * (T193829) Indicate when a Bot Password needs reset.
  82 * (T198037) GitInfo: Don't try shelling out if it's disabled.
  83 * (T151415) Log email changes.
  84 * (T197206) Fix performance regression when multiple DB used without caching.
  85 * (T197030) PHPSessionHandler: Suppress headers warnings in initialize().
  86 * (T182377, T196793) Exif: Guard against uncountable tag values.
  87 * (T200861) Fix total breakage of SQLite web upgrade.
  88 * (T200864) Fix pingback over-reporting on non-MySQL databases
  89 * (T202550) Unbreak SpecialListusersHeaderForm and SpecialListusersHeader
  90   hooks.
  91
  92 === Changes since MediaWiki 1.31.0-rc.2 ===
  93 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  94 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  95 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  96 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  97 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  98 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  99 * (T196672) The mtime of extension.json files is now able to be zero
 100 * (T180403) Validate $length in padleft/padright parser functions.
 101 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
 102
 103 === Changes since MediaWiki 1.31.0-rc.0 ===
 104 * (T33223) Drop archive.ar_text and ar_flags.
 105 * Add default edit rate limit of 90 edits/minute for all users.
 106 * (T187645) Use codepoint as tiebreaker when getting first-letters in
 107   IcuCollation.
 108 * (T191947) Don't shell during the installer if shelling out is disabled.
 109 * (T194319) Improve duplicate config setting exception as part of extension
 110   registration.
 111 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
 112 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
 113 * Do not incorrectly hide namespace input field in the installer.
 114 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
 115
 116 === Important pre-upgrade notes for 1.31 ===
 117 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
 118   schema changes, and cannot have downtime to run migrateArchiveText.php and
 119   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
 120   to the ar_text and ar_flags columns of the archive table or make those
 121   columns nullable before upgrading to MediaWiki 1.31.
 122   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
 123 * The CologneBlue and Modern skins are no longer bundled with the tarball. You
 124   will need to remove the wfLoadSkin() calls from your LocalSettings.php or
 125   download them separately
 126   (<https://www.mediawiki.org/wiki/Special:SkinDistributor>).
 127
 128 === Configuration changes in 1.31 ===
 129 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
 130   a future version. The API is now considered to be stable, secure and
 131   essential.
 132 * $wgUsejQueryThree was removed, as it is now the default. This was documented
 133   as a temporary variable during the migration period, deprecated since 1.29.
 134 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
 135   possible for fallback images such as png.
 136 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
 137   have the right to mark things patrolled.
 138 * Wikis that contain imported revisions or CentralAuth global blocks should run
 139   maintenance/cleanupUsersWithNoId.php.
 140 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
 141   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
 142 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
 143   are not using the latest version of the Referrer Policy specification.
 144 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
 145   first step of migration to human-readable section IDs that will later result
 146   in 'html5' being the default mode.
 147 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
 148   as upstream is inactive and has no plans to move to PHP 7.
 149 * The old CategorizedRecentChanges feature, including its related configuration
 150   option $wgAllowCategorizedRecentChanges, has been removed.
 151 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
 152   for performance reasons, and installations with this setting will now work as
 153   if it was configured with 'any'.
 154 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
 155   rather than being off by default. If you wish to disable HTML tidying
 156   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
 157   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
 158 * $wgLogAutopatrol now defaults to false instead of true.
 159 * $wgValidateAllHtml was removed and will be ignored.
 160 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
 161   1.25 release notes for more information.
 162 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
 163   framework that it enables. Some extensions mistakenly used this to check
 164   whether any AJAX functionality at all should be enabled, further making this
 165   problematic to retain.
 166 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
 167   has been marked as experimental ever since it was introduced.
 168 * Fix $magicWords for the Sanskrit language
 169
 170 === New features in 1.31 ===
 171 * (T76554) User sub-pages named ….json are now protected in the same way that
 172   ….js and ….css pages are, so that configuration options can safely be placed
 173   there.
 174 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
 175   with parentheses for grouping.
 176 * As a first pass in standardizing dialog boxes across the MediaWiki product,
 177   Html class now provides helper methods for messageBox, successBox, errorBox
 178   and warningBox generation.
 179 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
 180   a format like "iw>Example".
 181 * (T20209) Linker (used on history pages, log pages, and so on) will display
 182   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
 183   [[iw:User:Example|iw>Example]].
 184 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
 185   users during an import.
 186 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 187   the ParserOutput::getText() post-cache transformations.
 188 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 189   initial page text for file uploads.
 190 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 191   hash value in the table of basic information.
 192 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 193   ParserOutput::getText() post-cache transformation. This may be disabled by
 194   passing 'deduplicateStyles' => false to that method.
 195 * The identity of the logged-in or IP "actor" for logged actions is being moved
 196   into a new actor table, with the rows in tables such as revision and logging
 197   referring to the actor ID instead of storing the user ID and name/IP in
 198   every row.
 199   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 200     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 201     soon as any necessary extensions are updated.
 202   * Most code accessing rows for logged actions from the database should use
 203     the relevant getQueryInfo() methods to get the information needed to build
 204     the SQL query. The ActorMigration class may also be used to get feature
 205     -flagged information needed to access actor-related fields during the
 206     migration period.
 207 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 208   section without having to roll back the whole transaction.
 209 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 210   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 211   transaction on failure.
 212 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 213 * The CLI installer (maintenance/install.php) learned to detect and include
 214   extensions. Pass --with-extensions to enable that feature.
 215 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 216   "1" for manually patrolled and "2" for autopatrolled actions.
 217 * Extensions can now set their type to "editor" if they provide an editor or
 218   enhance the editing experience.
 219 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 220   property in extension.json. See the documentation at
 221   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 222   for more details and an example.
 223 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 224   discussion pages) now have a tooltip to indicate state, not just colour.
 225
 226 === External library changes in 1.31 ===
 227 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 228   suggested to required. These packages now must be installed via composer
 229   and not via PEAR itself.
 230
 231 ==== Upgraded external libraries ====
 232 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 233 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 234 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 235 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 236 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 237 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 238 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 239 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 240 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 241 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 242 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 243
 244 ==== New external libraries ====
 245 * Added wikimedia/object-factory 1.0.0
 246
 247 ==== Removed and replaced external libraries ====
 248 * (T17845) The deprecated 'jquery.badge' module was removed.
 249 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 250   text-overflow property instead.
 251 * The deprecated 'jquery.placeholder' module was removed.
 252 * The deprecated 'jquery.appear' module was removed. Use the
 253   'mediawiki.viewport' module instead.
 254 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 255
 256 === Bug fixes in 1.31 ===
 257 * (T90902) Non-breaking space in header ID breaks anchor.
 258 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 259   space.
 260 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 261   links is now stripped rather than leaving blank lines in odd places.
 262 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 263 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 264
 265 === Action API changes in 1.31 ===
 266 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 267   removed. It has never made a difference in the output, the name was always
 268   returned regardless.
 269 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 270   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 271   'watchlist' instead.
 272
 273 === Action API internal changes in 1.31 ===
 274 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 275 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 276 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 277
 278 === Languages updated in 1.31 ===
 279 MediaWiki supports over 350 languages. Many localisations are updated
 280 regularly. Below only new and removed languages are listed, as well as
 281 changes to languages because of Phabricator reports.
 282
 283 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 284 * (T182305) New language support: Nyungar (nys).
 285 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 286 * (T186635) New language support: Guianan Creole (gcr).
 287 * (T186647) New language support: Kumyk [къумукъ] (kum).
 288 * (T187750) New language support: Spanish formal address (es-formal).
 289 * (T187824) New language support: Hungarian formal address (hu-formal).
 290 * (T189127) New language support: Gorontalo (gor).
 291
 292 === Breaking changes in 1.31 ===
 293 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 294 * The OutputPage class constructor now requires a context parameter.
 295   Instantiating without context was deprecated in 1.18.
 296 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 297 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 298   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 299 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 300   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 301 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 302   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 303 * The deprecated MW_DIFF_VERSION constant was removed.
 304   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 305 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 306   no access restriction has been removed.
 307 * The Block class will no longer accept usable-but-missing usernames for
 308   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 309   locally or use a new interwiki-format username like "iw>Example".
 310 * The following methods and constants from the WatchedItem class, which were
 311   deprecated in 1.27, have been removed:
 312   * WatchedItem::getTitle()
 313   * WatchedItem::fromUserTitle()
 314   * WatchedItem::addWatch()
 315   * WatchedItem::removeWatch()
 316   * WatchedItem::isWatched()
 317   * WatchedItem::duplicateEntries()
 318   * WatchedItem::IGNORE_USER_RIGHTS
 319   * WatchedItem::CHECK_USER_RIGHTS
 320   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 321 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 322   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 323   variable, has been deprecated since 1.27 and was removed as well.
 324 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 325   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 326   variable, has been deprecated since 1.27 and was removed as well.
 327 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 328   HtmlFormatter\HtmlFormatter class should be used instead.
 329 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 330   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 331   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 332 * The following properties of PreparedEdit were deprecated in 1.21 and have
 333   been removed:
 334   * PreparedEdit->newText
 335   * PreparedEdit->oldText
 336   * PreparedEdit->pst
 337 * ParserOutput objects which are generated using a non-default value for
 338   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 339   cache.
 340 * The following deprecated methods from the OutputPage class have been removed:
 341   * OutputPage::addExtensionStyle(); deprecated in 1.27
 342   * OutputPage::getExtStyle(); deprecated in 1.27
 343   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 344   * OutputPage::setSquidMaxage(); deprecated in 1.27
 345   * OutputPage::readOnlyPage(); deprecated in 1.25
 346   * OutputPage::rateLimited(); deprecated in 1.25
 347   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 348     through the above and with no known uses, was removed.
 349 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 350 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 351   were removed:
 352   * $isCssJsSubpage — use ::isUserConfigPage()
 353   * $isCssSubpage — use ::isUserCssConfigPage()
 354   * $isJsSubpage — use ::isUserJsConfigPage()
 355   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 356   * ::getSummaryInput() – use ::getSummaryInputWidget()
 357   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 358   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 359       ::getCheckboxesDefinition()
 360   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 361       ::getCheckboxesDefinition()
 362 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 363 * In User, the cookie-related methods which were wrappers for the functions on
 364   the response object, and were deprecated in 1.27, have been removed:
 365   * ::setCookie()
 366   * ::clearCookie()
 367   * ::setExtendedLoginCookie()
 368   Note that User::setCookies() remains, and is not deprecated.
 369 * Also in User, some auth-related methods which were deprecated in 1.27 have
 370   been removed:
 371   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 372   * ::getPasswordFactory() – create a PasswordFactory directly
 373   * ::passwordChangeInputAttribs()
 374 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 375   been removed.
 376 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 377   use ::getNames() instead.
 378 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 379   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 380 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 381   Wikimedia\base_convert() directly.
 382 * Calling Database::begin() explicitly during an implicit transaction or when
 383   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 384   for an implicit transaction also results in an exception. Previously these
 385   were logged as errors. The startAtomic() and endAtomic() methods, or
 386   AtomicSectionUpdate should be used instead.
 387 * The global function wfOutputHandler() was removed, use the its replacement
 388   MediaWiki\OutputHandler::handle() instead. The global function was only
 389   sometimes defined. Its replacement is always available via the autoloader.
 390 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 391   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 392   ::listSoftwareDefinedTags() instead.
 393 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 394   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 395 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 396 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 397 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 398   ResourceLoaderModule::getLessVars() to expose local variables instead of
 399   global ones.
 400 * As part of work to modernise user-generated content clean-up, a config option
 401   and some methods related to HTML validity were removed without deprecation.
 402   The public methods MWTidy::checkErrors() and the path through which it was
 403   called, TidyDriverBase::validate(), are removed, as are the testing methods
 404   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 405   The $wgValidateAllHtml configuration option is removed and will be ignored.
 406 * Execution of external programs using MediaWiki\Shell\Command now applies
 407   the RESTRICT_DEFAULT Firejail restriction by default.
 408 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 409   deprecated in 1.26, were removed.
 410 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 411   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 412
 413 === Deprecations in 1.31 ===
 414 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 415   RevisionRecord and its subclasses.
 416 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 417 * The global function wfCountDown is now deprecated in favor of
 418   Maintenance::countDown.
 419 * Several methods for returning lists of fields to select from the database
 420   have been deprecated in favor of similar methods that also return the tables
 421   to select from and the join conditions for those tables.
 422   * Block::selectFields() → Block::getQueryInfo()
 423   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 424   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 425   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 426   * LocalFile::getCacheFields() with a prefix no longer works
 427   * LocalFile::getLazyCacheFields() with a prefix no longer works
 428   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 429   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 430   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 431   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 432   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 433   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 434   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 435   * Revision::selectFields() → Revision::getQueryInfo()
 436   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 437   * User::selectFields() → User::getQueryInfo()
 438   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 439 * Revision::setUserIdAndName() was deprecated.
 440 * Access to TitleValue class properties was deprecated, the relevant getters
 441   should be used instead.
 442 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 443   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 444 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 445   Maintenance::fatalError() instead.
 446 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 447 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 448   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 449   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 450 * The following methods that get and set ParserOutput state are deprecated.
 451   Callers should use the new stateless $options parameter to
 452   ParserOutput::getText() instead.
 453   * ParserOptions::getEditSection()
 454   * ParserOptions::setEditSection()
 455   * ParserOutput::getEditSectionTokens()
 456   * ParserOutput::setEditSectionTokens()
 457   * ParserOutput::getTOCEnabled()
 458   * ParserOutput::setTOCEnabled()
 459   * OutputPage::enableSectionEditLinks()
 460   * OutputPage::sectionEditLinksEnabled()
 461   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 462     are also deprecated.
 463 * License::getLicenses has been deprecated; use License::getLines instead.
 464 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 465   Setting template variables by reference allowed violating the principle of
 466   data being immutable once added to the skin template. In practice, this method
 467   was not being used for that. Rather, setRef() existed as memory optimisation
 468   for PHP 4.
 469 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 470   favour of Skin::msg() parameters.
 471 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 472   wfMessage().
 473 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 474   'unwrap' transform to ParserOutput::getText() instead.
 475 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 476   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 477   used instead.
 478 * CommentStore::newKey is deprecated. Instead, get an instance from
 479   MediaWikiServices.
 480 * The following CommentStore methods have had their signatures changed to
 481   introduce a $key parameter, usage of the methods on instances retrieved from
 482   CommentStore::newKey will remain unchanged but deprecated:
 483   * CommentStore::getFields
 484   * CommentStore::getJoin
 485   * CommentStore::getComment
 486   * CommentStore::getCommentLegacy
 487   * CommentStore::insert
 488   * CommentStore::insertWithTemplate
 489 * The following methods in Title have been renamed, and the old ones are
 490   deprecated:
 491   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 492   * Title::isCssOrJsPage – use ::isSiteConfigPage
 493   * Title::isCssJsSubpage – use ::isUserConfigPage
 494   * Title::isCssSubpage – use ::isUserCssConfigPage
 495   * Title::isJsSubpage – use ::isUserJsConfigPage
 496 * The following methods related to caching of half-parsed HTML were deprecated:
 497   * Parser::serializeHalfParsedText()
 498   * Parser::unserializeHalfParsedText()
 499   * Parser::isValidHalfParsedText()
 500   * StripState::getSubState()
 501   * StripState::merge()
 502 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 503 * The type string for the parameter $lang of DateFormatter::getInstance is
 504   deprecated.
 505 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 506 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 507   used instead.
 508 * The function wfShellWikiCmd() has been deprecated, use
 509   MediaWiki\Shell::makeScriptCommand().
 510 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 511   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 512
 513 === Other changes in 1.31 ===
 514 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 515 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 516   continues at Grade A.
 517 * Multi-content-revision capability was introduced into the storage layer. See
 518   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 519 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 520   Links written using square brackets will get the class "text" not "free".
 521 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 522   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 523   headings, HTML list items, HTML table captions, HTML table headings, HTML
 524   table cells will not have this trimming behavior.
 525
 526 == Compatibility ==
 527 MediaWiki 1.31 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 528 supported, it is generally advised to use PHP 7.0.13 or later for long term
 529 support. MediaWiki requires that the mbstring, xml, ctype, json, iconv and
 530 fileinfo PHP extensions are loaded to work.
 531
 532 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 533 but support for them is somewhat less mature. There is experimental support for
 534 Oracle and Microsoft SQL Server.
 535
 536 The supported versions are:
 537
 538 * MySQL 5.5.8 or later
 539 * PostgreSQL 9.2 or later
 540 * SQLite 3.3.7 or later
 541 * Oracle 9.0.1 or later
 542 * Microsoft SQL Server 2005 (9.00.1399)
 543
 544 == Upgrading ==
 545 1.31 has several database changes since 1.30, and will not work without schema
 546 updates. Note that due to changes to some very large tables like the revision
 547 table, the schema update may take quite long (minutes on a medium sized site,
 548 many hours on a large site).
 549
 550 Don't forget to always back up your database before upgrading!
 551
 552 See the file UPGRADE for more detailed upgrade instructions, including
 553 important information when upgrading from versions prior to 1.11.
 554
 555 For notes on 1.30.x and older releases, see HISTORY.
 556
 557 == Online documentation ==
 558 Documentation for both end-users and site administrators is available on
 559 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 560 for pages that explicitly state that their contents are in the public domain):
 561
 562        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 563
 564 == Mailing list ==
 565 A mailing list is available for MediaWiki user support and discussion:
 566
 567        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 568
 569 A low-traffic announcements-only list is also available:
 570
 571        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 572
 573 It's highly recommended that you sign up for one of these lists if you're
 574 going to run a public MediaWiki, so you can be notified of security fixes.
 575
 576 == IRC help ==
 577 There's usually someone online in #mediawiki on irc.freenode.net.