RELEASE-NOTES-1.32

   1 == MediaWiki 1.32 ==
   2
   3 THIS IS NOT A RELEASE YET
   4
   5 MediaWiki 1.32 is an alpha-quality branch and is not recommended for use in
   6 production.
   7
   8 === Configuration changes in 1.32 ===
   9 * (T115414) The $wgEnableAPI and $wgEnableWriteAPI settings, deprecated in 1.31,
  10   have been removed.
  11 * The $wgUseAjax setting, deprecated in 1.31, is now ignored.
  12 * The $wgSiteSupportPage setting, unused since 1.5, was removed.
  13 * The $wgBrowserBlacklist setting, deprecated in 1.30, was removed.
  14 * The default quality of JPEG thumbnails generated by GD was reduced from 95 to
  15   80. The quality of JPEG thumbnails is now configurable through the new setting
  16   $wgJpegQuality (default 80). This aligns the quality to what ImageMagick uses.
  17 * $wgExperimentalHtmlIds, deprecated since 1.30, has been removed. The
  18   'html5-legacy' value for $wgFragmentMode is no longer accepted.
  19 * The experimental Html5Internal and Html5Depurate tidy drivers were removed.
  20   RemexHtml, which is the default, should be used instead.
  21 * (T135963) You can now define a Content Security Policy for your wiki. This
  22   adds a defense-in-depth feature to stop an attacker who has found a bug in
  23   the parser allowing them to insert malicious attributes. Disabled by default,
  24   you can configure this via $wgCSPHeader and $wgCSPReportOnlyHeader.
  25 * New configuration variable has been added: $wgCookieSetOnIpBlock.
  26   This determines whether to set a cookie when an IP user is blocked. Doing so
  27   means that a blocked user, even after moving to a new IP address, will still
  28   be blocked.
  29 * The archive table's ar_rev_id field is now unique.
  30 * Special:BotPasswords now requires reauthentication.
  31 * (T194414) The default watchlist view time has been increased from 3 to 7 days.
  32 * The right to edit sitewide Javascript (e.g. MediaWiki:Common.js), CSS or JSON
  33   was separated from 'editinterface' and is available under
  34   'editsitejs'/'editsitecss'/'editsitejson'. Having 'editinterface' is still
  35   necessary to edit such pages.
  36 * A new user group, 'interface-admin', is added for controlling access to
  37   sitewide CSS/JS (and editing other users' CSS/JS). No other group has
  38   'editsitecss', 'editusercss', 'editsitejs' or 'edituserjs' by default.
  39 * A new grant group, 'editsiteconfig', is added for granting the above rights.
  40 * The $wgPasswordSenderName setting, ignored since 1.23 by MediaWiki and almost
  41   all extensions, is no longer set at all. Instead, you can modify the system
  42   message `emailsender`.
  43
  44 === New features in 1.32 ===
  45 * (T112474) Generalized the ResourceLoader mechanism for overriding modules
  46   using a particular page during edit previews.
  47 * (T12331) You can now log page creation events by setting $wgPageCreationLog
  48   to true.
  49 * Added 'ApiParseMakeOutputPage' hook.
  50 * (T174313) Added checkbox on Special:ListUsers to display only users in
  51   temporary user groups.
  52 * (T152462) A cookie can now be set when an IP user is blocked to track that
  53   user if they move to a new IP address. This is disabled by default.
  54 * (T194950) Added 'ApiMaxLagInfo' hook.
  55 * SpecialPage::checkLoginSecurityLevel() will now preserve POST data when
  56   reauthenticating.
  57 * FormSpecialPage::execute() will now call checkLoginSecurityLevel() if
  58   getLoginSecurityLevel() returns non-false.
  59 * The 'ImageBeforeProduceHTML' hook is now passed three new parameters, $parser,
  60   &$query and &$widthOption, allowing extensions even finer control over the
  61   resulting HTML code.
  62 * Added new 'ArticleShowPatrolFooter' hook, which allows extensions to determine
  63   if the [mark as patrolled] link should be shown at the footer of patrollable
  64   pages.
  65 * The array of hidden options ($opts) passed to the 'SpecialSearchPowerBox' hook
  66   is now passed by reference, allowing extensions to modify or even unset it.
  67 * Added new 'OutputPageAfterGetHeadLinksArray' hook, allowing extensions to
  68   modify the return value of OutputPage#getHeadLinksArray in order to add,
  69   remove or otherwise alter the elements to be output in the page <head>.
  70 * (T28934) The 'HistoryPageToolLinks' hook allows extensions to append
  71   additional links to the subtitle of a history page.
  72 * The 'GetLinkColours' hook now receives an additional $title parameter,
  73   the Title object of the page being parsed, on which the links will be shown.
  74 * (T194731) DifferenceEngine supports multiple slots. Added SlotDiffRenderer to
  75   render diffs between two Content objects, and DifferenceEngine::setRevisions()
  76   to render diffs between two custom (potentially multi-content) revisions.
  77   Added GetSlotDiffRenderer hook which works like GetDifferenceEngine for slots.
  78
  79 === External library changes in 1.32 ===
  80 * …
  81
  82 ==== Upgraded external libraries ====
  83 * Updated QUnit from 2.4.0 to 2.6.0.
  84 * Updated wikimedia/scoped-callback from 1.0.0 to 2.0.0.
  85 ** ScopedCallback objects can no longer be serialized.
  86 * Updated wikimedia/wrappedstring from 2.3.0 to 3.0.1.
  87 * Updated mediawiki/mediawiki-codesniffer from v20.0.0 to v21.0.0.
  88 * Updated composer/spdx-licenses from 1.3.0 to 1.4.0.
  89 * Updated jquery.i18n from 1.0.4 to 1.0.5.
  90 * Updated wikimedia/timestamp from 1.0.0 to 2.0.0.
  91 * Updated wikimedia/remex-html from 1.0.3 to 2.0.0.
  92
  93 ==== New external libraries ====
  94 * Added wikimedia/xmp-reader 0.6.0
  95 * …
  96
  97 ==== Removed and replaced external libraries ====
  98 * …
  99
 100 === Bug fixes in 1.32 ===
 101 * SpecialPage::execute() will now only call checkLoginSecurityLevel() if
 102   getLoginSecurityLevel() returns non-false.
 103
 104 === Action API changes in 1.32 ===
 105 * Added templated parameters.
 106   * A module can define a templated parameter like "{fruit}-quantity", where
 107     the actual parameters recognized correspond to the values of a multi-valued
 108     parameter. Then clients can make requests like
 109     "fruits=apples|bananas&apples-quantity=1&bananas-quantity=5".
 110   * action=paraminfo will return templated parameter definitions separately
 111     from normal parameters. All parameter definitions now include an "index"
 112     key to allow clients to maintain parameter ordering when merging normal and
 113     templated parameters.
 114 * It is now an error to submit too many values for a multi-valued parameter.
 115   This has generated a warning since MediaWiki 1.14.
 116 * Assertion failures from the 'assert' and 'assertuser' parameters will no
 117   longer use the action module's custom response format, for the few modules
 118   that use custom formatters that handle errors.
 119 * (T198935) User list preferences such as `email-blacklist` and similar
 120   extension preferences are no longer represented as arrays when returned by
 121   action=query&meta=userinfo&uiprop=options.
 122 * 'missingparam' errors will now use the prefixed parameter name in the code
 123   and error text, e.g. "noxxfoo" and "The 'xxfoo' parameter must be set" rather
 124   than "nofoo" and "The 'foo' parameter must be set".
 125 * action=query&prop=revisions now takes a 'rvslots' parameter to indicate the
 126   multi-content revision slots for which content should be returned. It also
 127   has a new rvprop, 'roles', to indicate which roles have slots. A deprecation
 128   warning will be issued if rvprop=content or rvprop=contentmodel are used
 129   without rvslots.
 130 * The rvcontentformat parameter to action=query&prop=revisions has been
 131   deprecated. Clients should be prepared to deal with the default format for
 132   relevant models.
 133 * Use of the deprecated parameters rvexpandtemplates, rvgeneratexml, rvparse,
 134   rvdiffto, rvdifftotext, rvdifftotextpst, rvcontentformat, or the deprecated
 135   rvprop=parsetree is forbidden with the new 'rvslots' parameter.
 136 * action=query&prop=deletedrevisions, action=query&list=allrevisions, and
 137   action=query&list=alldeletedrevisions are changed similarly to
 138   &prop=revisions (see the three previous items).
 139
 140 === Action API internal changes in 1.32 ===
 141 * Added 'ApiParseMakeOutputPage' hook.
 142 * Parameter names may no longer contain '{' or '}', as these are now used for
 143   templated parameters.
 144 * (T194950) Added 'ApiMaxLagInfo' hook.
 145 * Added 'ApiParseMakeOutputPage' hook.
 146 * The following methods now take a RevisionRecord rather than a Revision. No
 147   external callers are known.
 148   * ApiFeedContributions::feedItemAuthor()
 149   * ApiFeedContributions::feedItemDesc()
 150   * ApiQueryRevisionsBase::extractRevisionInfo()
 151
 152 === Languages updated in 1.32 ===
 153 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 154 Below only new and removed languages are listed, as well as changes to languages
 155 because of Phabricator reports.
 156
 157 * (T193566) Added language support for Ambonese Malay (abs).
 158 * (T194047) Added language support for Shawiya, Latin script (shy-latn).
 159 * (T195940) Added language support for Batak Mandailing (btm).
 160 * (T137491) Added language support for Standard Moroccan Amazigh (zgh).
 161 * (T198132) Added language support for Manipuri (mni).
 162 * (T201276) Added language support for Western Armenian (hyw).
 163 * (T201583) Added language support for Mon (mnw).
 164
 165 === Breaking changes in 1.32 ===
 166 * $wgRequestTime, deprecated in 1.25, was removed. Use
 167   $_SERVER['REQUEST_TIME_FLOAT'] or WebRequest::getElapsedTime() instead.
 168 * The MediaWikiI18N class, deprecated in 1.31, was removed.
 169 * QuickTemplate::setTranslator(), deprecated in 1.31, was removed. Use
 170   Skin::msg() instead.
 171 * wfInitShellLocale(), deprecated in 1.30, was removed.
 172 * wfShellExecDisabled(), deprecated in 1.30, was removed.
 173 * The type string for the parameter $lang of DateFormatter::getInstance,
 174   deprecated in 1.31, was removed.
 175 * The EDIT_TOKEN_SUFFIX constant deprecated in 1.27, was removed. Use
 176   MediaWiki\Session\Token::SUFFIX instead.
 177 * EditPage::isOouiEnabled() deprecated in 1.30, was removed.
 178 * mw.util.wikiGetlink(), deprecated in 1.23, was removed. Use mw.util.getUrl()
 179   instead.
 180 * (T61113) The following methods and constants from the Revision class, which
 181   were deprecated in 1.25, have now been removed:
 182   * Revision::getRawUser()
 183   * Revision::getRawUserText()
 184   * Revision::getRawComment()
 185 * window.gM() from mediawiki.jqueryMsg, deprecated in 1.23, was removed. Use
 186   mw.msg() or mw.message() instead.
 187 * mw.util.escapeId(), deprecated in 1.30, was removed. Use
 188   mw.util.escapeIdForAttribute or mw.util.escapeIdForLink instead.
 189 * mw.util.updateTooltipAccessKeys(), deprecated in 1.24, was removed. Use
 190   jquery.accessKeyLabel instead.
 191 * The SqlDataUpdate class, deprecated in 1.28, has been removed.
 192 * The Html5Internal and Html5Depurate tidy driver classes were removed, along
 193   with the Balancer tidy implementation. Both implementations were experimental,
 194   and were replaced by RemexHtml.
 195 * (T179624) Job::insert() and ::batchInsert(), deprecated in 1.21, were both
 196   removed. Use JobQueueGroup::singleton()->push() instead.
 197 * The jquery.footHovzer module, for mediawiki.debug, was removed.
 198 * The es5-shim module, empty and deprecated since 1.29, was removed.
 199 * the dom-level2-shim module, empty and deprecated since 1.29, was removed.
 200 * the json module, empty and deprecated since 1.29, was removed.
 201 * The mediawiki.widgets.visibleByteLimit module alias, deprecated in 1.32, was
 202   removed. Use mediawiki.widgets.visibleLengthLimit instead.
 203 * The jquery.farbtastic module, unused since 1.18, was removed.
 204 * The 'jquery.expandableField' module, unused since 1.22, was removed.
 205 * (T181318) The $wgStyleVersion setting and its appendage to various script and
 206   style URLs in OutputPage, deprecated in 1.31, was removed.
 207 * The hooks 'PreferencesFormPreSave' and 'PreferencesGetLegend' may provide
 208   any HTMLForm object rather than PreferencesForm.
 209 * The non namespaced TimestampException class, deprecated in 1.29, was removed.
 210   Use Wikimedia\Timestamp\TimestampException instead.
 211 * The global functions codepointToUtf8, hexSequenceToUtf8, utf8ToHexSequence,
 212   utf8ToCodepoint, and escapeSingleString (deprecated in 1.25) were removed.
 213   The UtfNormal\Utils class from the utfnormal library should be used instead.
 214 * The deprecated UTF8_ and UNICODE_ constants were removed. The class constants
 215   from the UtfNormal\Constants class from the utfnormal library should be used
 216 * (T140807) The wgResourceLoaderLESSImportPaths configuration option was removed
 217   from ResourceLoader. Instead, use `@import` statements in LESS to import
 218   files directly from nearby directories within the same project.
 219 * (T140804) The wgResourceLoaderLESSVars configuration option, deprecated
 220   since 1.30, was removed. Instead, to expose variables from PHP to LESS, use
 221   the ResourceLoaderModule::getLessVars() method.
 222 * The protected methods PHPSessionHandler::returnSuccess() and returnFailure(),
 223   only needed for PHP5 compatibility, have been removed. It now uses the boolean
 224   values `true` and `false` respectively.
 225 * The $parserMemc global and wfGetParserCacheStorage(), deprecated since 1.30,
 226   were removed. Use the ParserCache class instead.
 227 * ScopedCallback (deprecated in 1.28) was removed. Use Wikimedia\ScopedCallback
 228   instead.
 229 * Support for ResourceLoaderModule::getModifiedTime() and getModifiedHash(),
 230   deprecated since 1.26, was removed. Use getDefinitionSummary() instead.
 231 * (T195256) Skins are recommended not to rely on JavaScript for the "mw-jump"
 232   and "jump-to-nav" accessibility links. To this end, the "jquery.mw-jump"
 233   is no longer loaded by default. The Vector and MonoBook skins have made a
 234   minor change to implement the toggle feature with CSS instead. To restore
 235   prior functionality, either explicitly load "jquery.mw-jump" in your skin
 236   or refer to T195256 for details on how to make the same change.
 237 * Hook 'EditPageBeforeEditChecks' was removed;
 238   use 'EditPageGetCheckboxesDefinition' instead.
 239 * Linker::getLinkColour() and DummyLinker::getLinkColour(), deprecated since
 240   1.28, were removed. LinkRenderer::getLinkClasses() should be used instead.
 241 * Wikimedia\Rdbms\LoadBalancer::getLaggedSlaveMode(), deprecated in 1.28, has
 242   been removed. Use Wikimedia\Rdbms\LoadBalancer::getLaggedReplicaMode()
 243   instead.
 244 * mw.widgets.CategoryMultiselectWidget now uses TagMultiselectWidget instead of
 245   CapsuleMultiselectWidget. The following methods may no longer be used:
 246   * setItemsFromData: Use setValue instead
 247   * getItemsData: Use getItems instead and get the data property
 248 * Two OutputPage methods, addMetadataLink() and getMetadataAttribute(), were
 249   removed.  Use addLink() instead.
 250 * Another two OutputPage methods, setPageTitleActionText() and
 251   getPageTitleActionText(), were removed.  They did nothing since 1.15 (almost
 252   ten years).  Use setHTMLTitle() directly.
 253 * All MagicWord static member variables have been removed.  Use appropriate
 254   hooks or MagicWordFactory methods instead.
 255 * MagicWord::clearCache() has been removed.  Instead, create a new
 256   MagicWordFactory, such as by calling
 257   resetServiceForTesting( 'MagicWordFactory' ) on a MediaWikiServices.
 258 * mw.util.init() has been removed. This function is not needed anymore and was
 259   a no-op function since 1.30.
 260 * SpecialPageFactory::resetList() is a no-op.  Call overrideMwServices()
 261   instead.
 262
 263 === Deprecations in 1.32 ===
 264 * Use of a StartProfiler.php file is deprecated in favour of placing
 265   configuration in LocalSettings.php.
 266 * HTMLForm::setSubmitProgressive() is deprecated. No need to call it. Submit
 267   button is already marked as progressive.
 268 * Skin::setupSkinUserCss() is deprecated. Adding of modules to load
 269   has been centralised to Skin::getDefaultModules(), which is now capable
 270   of queueing style modules as well.
 271 * OutputPage::addModuleScripts() and ParserOutput::addModuleScripts are
 272   deprecated. Use addModules() instead.
 273 * Overriding SearchEngine::{searchText,searchTitle,searchArchiveTitle}
 274   in extending classes is deprecated.  Extend related doSearch* methods
 275   instead.
 276 * CollationFa has been removed completely as it's not needed anymore
 277 * The following 'mediawiki.api' plugin modules were merged into mediawiki.api
 278   and deprecated: mediawiki.api.category, mediawiki.api.edit,
 279   mediawiki.api.login, mediawiki.api.options, mediawiki.api.parse,
 280   mediawiki.api.upload, mediawiki.api.user, mediawiki.api.watch,
 281   mediawiki.api.messages, and mediawiki.api.rollback.
 282 * ApiBase::truncateArray() is deprecated. No replacement, as nothing is known
 283   to use it.
 284 * WatchAction::getUnwatchToken is deprecated. Use WatchAction::getWatchToken
 285   with the 'unwatch' action parameter instead.
 286 * IcuCollation::getICUVersion() is deprecated, as you can just use the PHP
 287   constant INTL_ICU_VERSION directly in all versions that MediaWiki supports.
 288 * Parser::fetchFile() is deprecated. Use ::fetchFileAndTitle() instead.
 289 * The ApiQueryContributions class has been renamed to ApiQueryUserContribs.
 290 * The XMPInfo, XMPReader, and XMPValidate classes have been deprecated in favor
 291   of the namespaced classes provided by the wikimedia/xmp-reader library.
 292 * SearchResultSet::{next,rewind} are deprecated. Calling code should
 293   use foreach on the SearchResultSet, or the extractResults method. Extending
 294   code should override extractResults.
 295 * Instantiating SearchResultSet directly is deprecated. SearchEngine
 296   implementations must subclass SearchResultSet for their purposes.
 297 * SearchResult::setExtensionData argument has been changed from accepting an
 298   array to accepting a Closure that returns the array when called.
 299 * Class CryptRand, everything in MWCryptRand except generateHex() and function
 300   MediaWikiServices::getCryptRand() are deprecated, use random_bytes() to
 301   generate cryptographically secure random byte sequences.
 302 * Parser::getConverterLanguage() is deprecated.  Use ::getTargetLanguage()
 303   instead.
 304 * Language::markNoConversion() is deprecated.  It confused readers because
 305   it had unexpected behavior (only marking text if it looked like a URL)
 306   and was only used in a single place in the code.  Use
 307   LanguageConverter::markNoConversion() instead.
 308 * (T197492) Language::truncate() was soft deprecated in 1.31 and is
 309   hard deprecated in this release.  It has been split into two similar
 310   methods, Language::truncateForVisual() and Language::truncateForDatabase(),
 311   which measure length in characters and bytes, respectively.  Use
 312   Language::truncateForVisual() when possible to provide equity to users
 313   of multibyte scripts.
 314 * (T176526) EditPage::getContextTitle() falling back to $wgTitle when the
 315   context title is unset is now deprecated; anything creating an EditPage
 316   instance should set the context title via ::setContextTitle().
 317 * The 'jquery.hidpi' module (polyfill for IMG srcset) is deprecated.
 318 * ResourceLoaderStartUpModule::getStartupModules() and ::getLegacyModules()
 319   are deprecated. These concepts are obsolete and have no replacement.
 320 * String type for $lang of DifferenceEngine::setTextLanguage is deprecated.
 321 * The following methods of OutputPage are now deprecated in favour
 322   of using showFatalError directly: OutputPage::showFileDeleteError()
 323   OutputPage::showFileNotFoundError(), OutputPage::showFileRenameError()
 324   OutputPage::showFileCopyError() and OutputPage::showUnexpectedValueError().
 325 * The Replacer, DoubleReplacer, HashtableReplacer, and RegexlikeReplacer
 326   classes are now deprecated. Use a Closure instead.
 327 * (T194263) ContentHandler::makeParserOptions() is deprecated. Use
 328   WikiPage::makeParserOptions() or ParserOptions::newCanonical() instead.
 329 * (T100681) Use of the Parsoid v1 API with the VirtualRESTService, deprecated in
 330   MediaWiki 1.26,  is now hard-deprecated. All known clients were converted to
 331   the Parsoid v3 API in May 2015.
 332 * $input is deprecated in hook 'LogEventsListGetExtraInputs'. Use
 333   $formDescriptor instead.
 334 * SearchEngine::transformSearchTerm( $term ) should no longer be called prior
 335   to running searchText. This method was mainly implemented to support the
 336   'prefix' URI param in SpecialSearch, but there are no reasons to expose this
 337   logic as it should be handled internally by SearchEngine implementations
 338   supporting this feature. SearchEngine implementations should no longer
 339   override this methods.
 340 * SearchEngine::replacePrefixes( $query ) should no longer be called prior
 341   to running searchText/searchTitle.
 342 * (T199657) Messages for $wgFilterLogTypes labels should be no longer be in the
 343   'log-show-hide-[type]' format. Instead use 'logeventslist-[type]-log'.
 344 * Global functions  wfArrayFilter() and wfArrayFilterByKey() are deprecated.
 345   use array_filter() directly.
 346 * The $wgShowSQLErrors global is deprecated and nonfunctional.
 347   Set $wgShowExceptionDetails and/or $wgShowHostnames instead.
 348 * The $wgShowDBErrorBacktrace global is deprecated and nonfunctional.
 349   Set $wgShowExceptionDetails instead.
 350 * Public access to the DifferenceEngine properties mOldid, mNewid, mOldRev,
 351   mNewRev, mOldPage, mNewPage, mOldContent, mNewContent, mRevisionsLoaded,
 352   mTextLoaded and mCacheHit is deprecated. Use getOldid() / getNewid() /
 353   getOldRevision() / getNewRevision() for the first four (note that the
 354   revision ones return a RevisionRecord, not a Revision), do your own lookup
 355   for page/content.
 356 * The $wgExternalDiffEngine value 'wikidiff2' is deprecated. To use wikidiff2
 357   just enable the PHP extension, and it will be autodetected.
 358 * (T194731) DifferenceEngine properties mOldContent and mNewContent and methods
 359   setContent(), generateContentDiffBody(), generateTextDiffBody() and textDiff()
 360   are deprecated. To interact with a single slot, use a SlotDiffRenderer (and
 361   subclass it to customize diff rendering); to diff custom (e.g. unsaved)
 362   content, use setRevisions(). Subclassing DifferenceEngine should only be done
 363   to customize page-level diff properties (such as the navigation header).
 364 * The wfUseMW function, soft-deprecated in 1.26, is now hard deprecated.
 365 * All MagicWord static methods are now deprecated.  Use the MagicWordFactory
 366   methods instead.
 367 * PasswordFactory::init is deprecated. To get a password factory with the
 368   standard configuration, use MediaWikiServices::getPasswordFactory.
 369 * $wgContLang is deprecated, use MediaWikiServices::getContentLanguage()
 370   instead.
 371 * $wgParser is deprecated, use MediaWikiServices::getParser() instead.
 372 * wfGetMainCache() is deprecated, use ObjectCache::getLocalClusterInstance()
 373   instead.
 374 * wfGetCache() is deprecated, use ObjectCache::getInstance() instead.
 375 * All SpecialPageFactory static methods are deprecated. Instead, call the
 376   methods on a SpecialPageFactory instance, which may be obtained from
 377   MediaWikiServices.
 378
 379 === Other changes in 1.32 ===
 380 * (T198811) The following tables have had their UNIQUE indexes turned into
 381   proper PRIMARY KEYs for increased maintainability: interwiki, page_props,
 382   protected_titles and site_identifiers.
 383 * OOUI HTMLForm will now display help text inline after the input field,
 384   rather than in a popup. Previous behavior can be restored by using
 385   `'help-inline' => false`.
 386 * …
 387
 388 == Compatibility ==
 389 MediaWiki 1.32 requires PHP 7.0.0 or later. Although HHVM 3.18.5 or later is
 390 supported, it is generally advised to use PHP 7.0.0 or later for long term
 391 support.
 392
 393 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 394 but support for them is somewhat less mature. There is experimental support for
 395 Oracle and Microsoft SQL Server.
 396
 397 The supported versions are:
 398
 399 * MySQL 5.5.8 or later
 400 * PostgreSQL 9.2 or later
 401 * SQLite 3.3.7 or later
 402 * Oracle 9.0.1 or later
 403 * Microsoft SQL Server 2005 (9.00.1399)
 404
 405 == Upgrading ==
 406 1.32 has several database changes since 1.31, and will not work without schema
 407 updates. Note that due to changes to some very large tables like the revision
 408 table, the schema update may take quite long (minutes on a medium sized site,
 409 many hours on a large site).
 410
 411 Don't forget to always back up your database before upgrading!
 412
 413 See the file UPGRADE for more detailed upgrade instructions, including
 414 important information when upgrading from versions prior to 1.11.
 415
 416 For notes on 1.31.x and older releases, see HISTORY.
 417
 418 == Online documentation ==
 419 Documentation for both end-users and site administrators is available on
 420 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 421 for pages that explicitly state that their contents are in the public domain):
 422
 423        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 424
 425 == Mailing list ==
 426 A mailing list is available for MediaWiki user support and discussion:
 427
 428        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 429
 430 A low-traffic announcements-only list is also available:
 431
 432        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 433
 434 It's highly recommended that you sign up for one of these lists if you're
 435 going to run a public MediaWiki, so you can be notified of security fixes.
 436
 437 == IRC help ==
 438 There's usually someone online in #mediawiki on irc.freenode.net.