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