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
  58 == MediaWiki 1.31.1 ==
  59
  60 This is a security and maintenance release of the MediaWiki 1.31 branch.
  61
  62 === Changes since MediaWiki 1.31.0 ===
  63 * (T169545, CVE-2018-0503) SECURITY: $wgRateLimits entry for 'user' overrides
  64   'newbie'.
  65 * (T194605, CVE-2018-0505) SECURITY: BotPasswords can bypass CentralAuth's
  66   account lock.
  67 * (T199029, CVE-2018-13258) SECURITY: Tarball was missing .htaccess files.
  68 * (T197229) Bundle Nuke extension, it was accidentally omitted.
  69 * (T193995) Fix undefined patchPath() method call in parser tests.
  70 * (T198687) Fix various selectFields methods to use the string 'NULL', not null.
  71 * Special:BotPasswords now requires reauthentication.
  72 * (T191608, T187638) Add 'logid' parameter to Special:Log.
  73 * (T193829) Indicate when a Bot Password needs reset.
  74 * (T198037) GitInfo: Don't try shelling out if it's disabled.
  75 * (T151415) Log email changes.
  76 * (T197206) Fix performance regression when multiple DB used without caching.
  77 * (T197030) PHPSessionHandler: Suppress headers warnings in initialize().
  78 * (T182377, T196793) Exif: Guard against uncountable tag values.
  79 * (T200861) Fix total breakage of SQLite web upgrade.
  80 * (T200864) Fix pingback over-reporting on non-MySQL databases
  81 * (T202550) Unbreak SpecialListusersHeaderForm and SpecialListusersHeader
  82   hooks.
  83
  84 === Changes since MediaWiki 1.31.0-rc.2 ===
  85 * (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
  86 * (T196092) Hide MySQL binary/utf-8 charset option in the installer.
  87 * (T196185) Don't allow setting $wgDBmysql5 in the installer.
  88 * (T196125) php-memcached 3.0 (provided with PHP 7.0) is now supported.
  89 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
  90 * (T118683) Fix exception from &$user deref on HHVM in the TitleMoveComplete hook.
  91 * (T196672) The mtime of extension.json files is now able to be zero
  92 * (T180403) Validate $length in padleft/padright parser functions.
  93 * (T143790) Make $wgEmailConfirmToEdit only affect edit actions.
  94
  95 === Changes since MediaWiki 1.31.0-rc.0 ===
  96 * (T33223) Drop archive.ar_text and ar_flags.
  97 * Add default edit rate limit of 90 edits/minute for all users.
  98 * (T187645) Use codepoint as tiebreaker when getting first-letters in
  99   IcuCollation.
 100 * (T191947) Don't shell during the installer if shelling out is disabled.
 101 * (T194319) Improve duplicate config setting exception as part of extension
 102   registration.
 103 * (T195211) Don't require trailing slash in PSR-4 autoloader directory.
 104 * (T186565) Fix PHP Notice from `ob_end_flush()` in `FileRepo::streamFile()`.
 105 * Do not incorrectly hide namespace input field in the installer.
 106 * (T186456) Refactor checks looking for PEAR maik libraries to be clearer.
 107
 108 === Important pre-upgrade notes for 1.31 ===
 109 * If you're using MySQL, SQLite, or MSSQL, are not using update.php to apply
 110   schema changes, and cannot have downtime to run migrateArchiveText.php and
 111   apply patch-drop-ar_text.sql manually, you'll have to apply a default value
 112   to the ar_text and ar_flags columns of the archive table or make those
 113   columns nullable before upgrading to MediaWiki 1.31.
 114   maintenance/archives/patch-nullable-ar_text.sql shows how to do this for MySQL.
 115 * The CologneBlue and Modern skins are no longer bundled with the tarball. You
 116   will need to remove the wfLoadSkin() calls from your LocalSettings.php or
 117   download them separately
 118   (<https://www.mediawiki.org/wiki/Special:SkinDistributor>).
 119
 120 === Configuration changes in 1.31 ===
 121 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
 122   a future version. The API is now considered to be stable, secure and
 123   essential.
 124 * $wgUsejQueryThree was removed, as it is now the default. This was documented
 125   as a temporary variable during the migration period, deprecated since 1.29.
 126 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
 127   possible for fallback images such as png.
 128 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does not
 129   have the right to mark things patrolled.
 130 * Wikis that contain imported revisions or CentralAuth global blocks should run
 131   maintenance/cleanupUsersWithNoId.php.
 132 * The configuration settings $wgResourceLoaderMinifierStatementsOnOwnLine and
 133   $wgResourceLoaderMinifierMaxLineLength, deprecated since 1.27, were removed.
 134 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that
 135   are not using the latest version of the Referrer Policy specification.
 136 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a
 137   first step of migration to human-readable section IDs that will later result
 138   in 'html5' being the default mode.
 139 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
 140   as upstream is inactive and has no plans to move to PHP 7.
 141 * The old CategorizedRecentChanges feature, including its related configuration
 142   option $wgAllowCategorizedRecentChanges, has been removed.
 143 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported
 144   for performance reasons, and installations with this setting will now work as
 145   if it was configured with 'any'.
 146 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input,
 147   rather than being off by default. If you wish to disable HTML tidying
 148   entirely, set $wgTidyConfig to null; if you wish to use the old, deprecated
 149   Tidy external binary, both set $wgTidyConfig to null and $wgUseTidy to true.
 150 * $wgLogAutopatrol now defaults to false instead of true.
 151 * $wgValidateAllHtml was removed and will be ignored.
 152 * $wgScriptExtension, deprecated and ignored since 1.25, was removed. See the
 153   1.25 release notes for more information.
 154 * $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
 155   framework that it enables. Some extensions mistakenly used this to check
 156   whether any AJAX functionality at all should be enabled, further making this
 157   problematic to retain.
 158 * $wgDBmysql5 is now deprecated, and will be removed in a future version. It
 159   has been marked as experimental ever since it was introduced.
 160 * Fix $magicWords for the Sanskrit language
 161
 162 === New features in 1.31 ===
 163 * (T76554) User sub-pages named ….json are now protected in the same way that
 164   ….js and ….css pages are, so that configuration options can safely be placed
 165   there.
 166 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support joins
 167   with parentheses for grouping.
 168 * As a first pass in standardizing dialog boxes across the MediaWiki product,
 169   Html class now provides helper methods for messageBox, successBox, errorBox
 170   and warningBox generation.
 171 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
 172   a format like "iw>Example".
 173 * (T20209) Linker (used on history pages, log pages, and so on) will display
 174   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
 175   [[iw:User:Example|iw>Example]].
 176 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
 177   users during an import.
 178 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
 179   the ParserOutput::getText() post-cache transformations.
 180 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
 181   initial page text for file uploads.
 182 * (T181651) The info page for File pages now displays the file's base-16 SHA1
 183   hash value in the table of basic information.
 184 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
 185   ParserOutput::getText() post-cache transformation. This may be disabled by
 186   passing 'deduplicateStyles' => false to that method.
 187 * The identity of the logged-in or IP "actor" for logged actions is being moved
 188   into a new actor table, with the rows in tables such as revision and logging
 189   referring to the actor ID instead of storing the user ID and name/IP in
 190   every row.
 191   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
 192     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
 193     soon as any necessary extensions are updated.
 194   * Most code accessing rows for logged actions from the database should use
 195     the relevant getQueryInfo() methods to get the information needed to build
 196     the SQL query. The ActorMigration class may also be used to get feature
 197     -flagged information needed to access actor-related fields during the
 198     migration period.
 199 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
 200   section without having to roll back the whole transaction.
 201 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
 202   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
 203   transaction on failure.
 204 * (T189785) Added a monthly heartbeat ping to the pingback feature.
 205 * The CLI installer (maintenance/install.php) learned to detect and include
 206   extensions. Pass --with-extensions to enable that feature.
 207 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
 208   "1" for manually patrolled and "2" for autopatrolled actions.
 209 * Extensions can now set their type to "editor" if they provide an editor or
 210   enhance the editing experience.
 211 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces"
 212   property in extension.json. See the documentation at
 213   <https://mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
 214   for more details and an example.
 215 * (T19099) Tabs which link to pages that don't exist (like those to uncreated
 216   discussion pages) now have a tooltip to indicate state, not just colour.
 217
 218 === External library changes in 1.31 ===
 219 * pear/mail, pear/mail_mime and pear/mail_mime-decode have been moved from
 220   suggested to required. These packages now must be installed via composer
 221   and not via PEAR itself.
 222
 223 ==== Upgraded external libraries ====
 224 * Updated jquery.chosen from v0.9.14 to v1.8.2.
 225 * Updated composer/spdx-licenses from 1.1.4 to 1.3.0 (development dependency).
 226 * Updated nikic/php-parser from 2.1.0 to 3.1.3 (development dependency).
 227 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 228 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 229 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 230 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 231 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 232 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.6.
 233 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 234 * Updated wikimedia/html-formatter from 1.0.1 to 1.0.2.
 235
 236 ==== New external libraries ====
 237 * Added wikimedia/object-factory 1.0.0
 238
 239 ==== Removed and replaced external libraries ====
 240 * (T17845) The deprecated 'jquery.badge' module was removed.
 241 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 242   text-overflow property instead.
 243 * The deprecated 'jquery.placeholder' module was removed.
 244 * The deprecated 'jquery.appear' module was removed. Use the
 245   'mediawiki.viewport' module instead.
 246 * mediawiki/at-ease was replaced with wikimedia/at-ease.
 247
 248 === Bug fixes in 1.31 ===
 249 * (T90902) Non-breaking space in header ID breaks anchor.
 250 * (T189375) CSSMin now allows quoted urls in `url()` syntax to start with a
 251   space.
 252 * (T2087, T10897, T87753, T174639) Whitespace created by category and language
 253   links is now stripped rather than leaving blank lines in odd places.
 254 * (T3780) Uploads with UTF-8 names now work on PHP7.1+ on Windows servers.
 255 * (T182366) UploadBase::checkXMLEncodingMissmatch() now works on PHP 7.1+
 256
 257 === Action API changes in 1.31 ===
 258 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 259   removed. It has never made a difference in the output, the name was always
 260   returned regardless.
 261 * The 'watch' and 'unwatch' parameters for action=move have been removed. They
 262   were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
 263   'watchlist' instead.
 264
 265 === Action API internal changes in 1.31 ===
 266 * ApiBase::getProfileDBTime, deprecated since 1.25, was removed.
 267 * ApiBase::getModuleProfileName, deprecated since 1.25, was removed.
 268 * ApiBase::getProfileTime, deprecated since 1.25, was removed.
 269
 270 === Languages updated in 1.31 ===
 271 MediaWiki supports over 350 languages. Many localisations are updated
 272 regularly. Below only new and removed languages are listed, as well as
 273 changes to languages because of Phabricator reports.
 274
 275 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK.
 276 * (T182305) New language support: Nyungar (nys).
 277 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 278 * (T186635) New language support: Guianan Creole (gcr).
 279 * (T186647) New language support: Kumyk [къумукъ] (kum).
 280 * (T187750) New language support: Spanish formal address (es-formal).
 281 * (T187824) New language support: Hungarian formal address (hu-formal).
 282 * (T189127) New language support: Gorontalo (gor).
 283
 284 === Breaking changes in 1.31 ===
 285 * MessageBlobStore::insertMessageBlob(), deprecated in 1.27, was removed.
 286 * The OutputPage class constructor now requires a context parameter.
 287   Instantiating without context was deprecated in 1.18.
 288 * The mw.page JavaScript singleton, deprecated in 1.30, was removed.
 289 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 290   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 291 * The Article::selectFields(), ::onArticleCreate(), ::onArticleDelete(), and
 292   ::onArticleEdit() methods, deprecated in 1.24, were removed.
 293 * Installer::locateExecutable() and ::locateExecutableInDefaultPaths() were
 294   removed. Use ExecutableFinder::findInDefaultPaths() instead.
 295 * The deprecated MW_DIFF_VERSION constant was removed.
 296   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 297 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 298   no access restriction has been removed.
 299 * The Block class will no longer accept usable-but-missing usernames for
 300   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 301   locally or use a new interwiki-format username like "iw>Example".
 302 * The following methods and constants from the WatchedItem class, which were
 303   deprecated in 1.27, have been removed:
 304   * WatchedItem::getTitle()
 305   * WatchedItem::fromUserTitle()
 306   * WatchedItem::addWatch()
 307   * WatchedItem::removeWatch()
 308   * WatchedItem::isWatched()
 309   * WatchedItem::duplicateEntries()
 310   * WatchedItem::IGNORE_USER_RIGHTS
 311   * WatchedItem::CHECK_USER_RIGHTS
 312   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 313 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 314   $wgResourceLoaderMinifierStatementsOnOwnLine, the corresponding configuration
 315   variable, has been deprecated since 1.27 and was removed as well.
 316 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 317   $wgResourceLoaderMinifierMaxLineLength, the corresponding configuration
 318   variable, has been deprecated since 1.27 and was removed as well.
 319 * The HtmlFormatter class, deprecated in 1.27, was removed. The namespaced
 320   HtmlFormatter\HtmlFormatter class should be used instead.
 321 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 322   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 323   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 324 * The following properties of PreparedEdit were deprecated in 1.21 and have
 325   been removed:
 326   * PreparedEdit->newText
 327   * PreparedEdit->oldText
 328   * PreparedEdit->pst
 329 * ParserOutput objects which are generated using a non-default value for
 330   ParserOptions::setWrapOutputClass() can no longer be added to the parser
 331   cache.
 332 * The following deprecated methods from the OutputPage class have been removed:
 333   * OutputPage::addExtensionStyle(); deprecated in 1.27
 334   * OutputPage::getExtStyle(); deprecated in 1.27
 335   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 336   * OutputPage::setSquidMaxage(); deprecated in 1.27
 337   * OutputPage::readOnlyPage(); deprecated in 1.25
 338   * OutputPage::rateLimited(); deprecated in 1.25
 339   * Additionally, the protected OutputPage::$mExtStyles array, only accessed
 340     through the above and with no known uses, was removed.
 341 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 342 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30,
 343   were removed:
 344   * $isCssJsSubpage — use ::isUserConfigPage()
 345   * $isCssSubpage — use ::isUserCssConfigPage()
 346   * $isJsSubpage — use ::isUserJsConfigPage()
 347   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 348   * ::getSummaryInput() – use ::getSummaryInputWidget()
 349   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 350   * ::getCheckboxes() – use ::getCheckboxesWidget() or
 351       ::getCheckboxesDefinition()
 352   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or
 353       ::getCheckboxesDefinition()
 354 * ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 355 * In User, the cookie-related methods which were wrappers for the functions on
 356   the response object, and were deprecated in 1.27, have been removed:
 357   * ::setCookie()
 358   * ::clearCookie()
 359   * ::setExtendedLoginCookie()
 360   Note that User::setCookies() remains, and is not deprecated.
 361 * Also in User, some auth-related methods which were deprecated in 1.27 have
 362   been removed:
 363   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 364   * ::getPasswordFactory() – create a PasswordFactory directly
 365   * ::passwordChangeInputAttribs()
 366 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have
 367   been removed.
 368 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 369   use ::getNames() instead.
 370 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 371   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 372 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 373   Wikimedia\base_convert() directly.
 374 * Calling Database::begin() explicitly during an implicit transaction or when
 375   DBO_TRX is set results in an exception. Calling Database::commit() explicitly
 376   for an implicit transaction also results in an exception. Previously these
 377   were logged as errors. The startAtomic() and endAtomic() methods, or
 378   AtomicSectionUpdate should be used instead.
 379 * The global function wfOutputHandler() was removed, use the its replacement
 380   MediaWiki\OutputHandler::handle() instead. The global function was only
 381   sometimes defined. Its replacement is always available via the autoloader.
 382 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags,
 383   deprecated in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
 384   ::listSoftwareDefinedTags() instead.
 385 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You can
 386   use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 387 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 388 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 389 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed. Use
 390   ResourceLoaderModule::getLessVars() to expose local variables instead of
 391   global ones.
 392 * As part of work to modernise user-generated content clean-up, a config option
 393   and some methods related to HTML validity were removed without deprecation.
 394   The public methods MWTidy::checkErrors() and the path through which it was
 395   called, TidyDriverBase::validate(), are removed, as are the testing methods
 396   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument().
 397   The $wgValidateAllHtml configuration option is removed and will be ignored.
 398 * Execution of external programs using MediaWiki\Shell\Command now applies
 399   the RESTRICT_DEFAULT Firejail restriction by default.
 400 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 401   deprecated in 1.26, were removed.
 402 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 403   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly.
 404
 405 === Deprecations in 1.31 ===
 406 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 407   RevisionRecord and its subclasses.
 408 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 409 * The global function wfCountDown is now deprecated in favor of
 410   Maintenance::countDown.
 411 * Several methods for returning lists of fields to select from the database
 412   have been deprecated in favor of similar methods that also return the tables
 413   to select from and the join conditions for those tables.
 414   * Block::selectFields() → Block::getQueryInfo()
 415   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 416   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 417   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 418   * LocalFile::getCacheFields() with a prefix no longer works
 419   * LocalFile::getLazyCacheFields() with a prefix no longer works
 420   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 421   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 422   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 423   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 424   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 425   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 426   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 427   * Revision::selectFields() → Revision::getQueryInfo()
 428   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 429   * User::selectFields() → User::getQueryInfo()
 430   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 431 * Revision::setUserIdAndName() was deprecated.
 432 * Access to TitleValue class properties was deprecated, the relevant getters
 433   should be used instead.
 434 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 435   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 436 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 437   Maintenance::fatalError() instead.
 438 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 439 * The RevisionInsertComplete hook is now deprecated; use instead the hook
 440   RevisionRecordInserted. RevisionInsertComplete is still called, but the second
 441   and third parameter will always be null. Hard deprecation is scheduled for 1.32.
 442 * The following methods that get and set ParserOutput state are deprecated.
 443   Callers should use the new stateless $options parameter to
 444   ParserOutput::getText() instead.
 445   * ParserOptions::getEditSection()
 446   * ParserOptions::setEditSection()
 447   * ParserOutput::getEditSectionTokens()
 448   * ParserOutput::setEditSectionTokens()
 449   * ParserOutput::getTOCEnabled()
 450   * ParserOutput::setTOCEnabled()
 451   * OutputPage::enableSectionEditLinks()
 452   * OutputPage::sectionEditLinksEnabled()
 453   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens
 454     are also deprecated.
 455 * License::getLicenses has been deprecated; use License::getLines instead.
 456 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 457   Setting template variables by reference allowed violating the principle of
 458   data being immutable once added to the skin template. In practice, this method
 459   was not being used for that. Rather, setRef() existed as memory optimisation
 460   for PHP 4.
 461 * QuickTemplate::setTranslator() and MediaWikiI18N::set() were deprecated in
 462   favour of Skin::msg() parameters.
 463 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or
 464   wfMessage().
 465 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 466   'unwrap' transform to ParserOutput::getText() instead.
 467 * \ObjectFactory (no namespace) is deprecated, the namespaced class
 468   \Wikimedia\ObjectFactory from the wikimedia/object-factory library should be
 469   used instead.
 470 * CommentStore::newKey is deprecated. Instead, get an instance from
 471   MediaWikiServices.
 472 * The following CommentStore methods have had their signatures changed to
 473   introduce a $key parameter, usage of the methods on instances retrieved from
 474   CommentStore::newKey will remain unchanged but deprecated:
 475   * CommentStore::getFields
 476   * CommentStore::getJoin
 477   * CommentStore::getComment
 478   * CommentStore::getCommentLegacy
 479   * CommentStore::insert
 480   * CommentStore::insertWithTemplate
 481 * The following methods in Title have been renamed, and the old ones are
 482   deprecated:
 483   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 484   * Title::isCssOrJsPage – use ::isSiteConfigPage
 485   * Title::isCssJsSubpage – use ::isUserConfigPage
 486   * Title::isCssSubpage – use ::isUserCssConfigPage
 487   * Title::isJsSubpage – use ::isUserJsConfigPage
 488 * The following methods related to caching of half-parsed HTML were deprecated:
 489   * Parser::serializeHalfParsedText()
 490   * Parser::unserializeHalfParsedText()
 491   * Parser::isValidHalfParsedText()
 492   * StripState::getSubState()
 493   * StripState::merge()
 494 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 495 * The type string for the parameter $lang of DateFormatter::getInstance is
 496   deprecated.
 497 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 498 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 499   used instead.
 500 * The function wfShellWikiCmd() has been deprecated, use
 501   MediaWiki\Shell::makeScriptCommand().
 502 * In the future, the hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend'
 503   will be allowed to provide any HTMLForm object rather than PreferencesForm.
 504
 505 === Other changes in 1.31 ===
 506 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 507 * Browser support for Opera 12 and older was dropped entirely. Opera 15+
 508   continues at Grade A.
 509 * Multi-content-revision capability was introduced into the storage layer. See
 510   <https://mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 511 * The "free" CSS class is now only applied to unbracketed URLs in wikitext.
 512   Links written using square brackets will get the class "text" not "free".
 513 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 514   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 515   headings, HTML list items, HTML table captions, HTML table headings, HTML
 516   table cells will not have this trimming behavior.
 517
 518 == Compatibility ==
 519 MediaWiki 1.31 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 520 supported, it is generally advised to use PHP 7.0.0 or later for long term
 521 support. MediaWiki requires that the mbstring, xml, ctype, json, iconv and
 522 fileinfo PHP extensions are loaded to work.
 523
 524 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 525 but support for them is somewhat less mature. There is experimental support for
 526 Oracle and Microsoft SQL Server.
 527
 528 The supported versions are:
 529
 530 * MySQL 5.5.8 or later
 531 * PostgreSQL 9.2 or later
 532 * SQLite 3.3.7 or later
 533 * Oracle 9.0.1 or later
 534 * Microsoft SQL Server 2005 (9.00.1399)
 535
 536 == Upgrading ==
 537 1.31 has several database changes since 1.30, and will not work without schema
 538 updates. Note that due to changes to some very large tables like the revision
 539 table, the schema update may take quite long (minutes on a medium sized site,
 540 many hours on a large site).
 541
 542 Don't forget to always back up your database before upgrading!
 543
 544 See the file UPGRADE for more detailed upgrade instructions, including
 545 important information when upgrading from versions prior to 1.11.
 546
 547 For notes on 1.30.x and older releases, see HISTORY.
 548
 549 == Online documentation ==
 550 Documentation for both end-users and site administrators is available on
 551 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 552 for pages that explicitly state that their contents are in the public domain):
 553
 554        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 555
 556 == Mailing list ==
 557 A mailing list is available for MediaWiki user support and discussion:
 558
 559        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 560
 561 A low-traffic announcements-only list is also available:
 562
 563        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 564
 565 It's highly recommended that you sign up for one of these lists if you're
 566 going to run a public MediaWiki, so you can be notified of security fixes.
 567
 568 == IRC help ==
 569 There's usually someone online in #mediawiki on irc.freenode.net.