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