RELEASE-NOTES-1.34

   1 = MediaWiki 1.34 =
   2
   3 == MediaWiki 1.34.0-PRERELEASE ==
   4
   5 THIS IS NOT A RELEASE YET
   6
   7 MediaWiki 1.34 is an alpha-quality development branch, and is not recommended
   8 for use in production.
   9
  10 == Upgrading notes for 1.34 ==
  11 1.34 has several database changes since 1.33, and will not work without schema
  12 updates. Note that due to changes to some very large tables like the revision
  13 table, the schema update may take quite long (minutes on a medium sized site,
  14 many hours on a large site).
  15
  16 Don't forget to always back up your database before upgrading!
  17
  18 See the file UPGRADE for more detailed upgrade instructions, including
  19 important information when upgrading from versions prior to 1.11.
  20
  21 Some specific notes for MediaWiki 1.34 upgrades are below:
  22
  23 * …
  24
  25 For notes on 1.33.x and older releases, see HISTORY.
  26
  27 === Configuration changes for system administrators in 1.34 ===
  28
  29 ==== New configuration ====
  30 * $wgAllowExternalReqID (T201409) - This configuration setting controls whether
  31   Mediawiki accepts the request ID set by the incoming request via the
  32   `X-Request-Id` header. If set to `true`, that value will be used throughout
  33   the code as the request identificator. Otherwise, the sent header will be
  34   ignored and the request ID will either be taken from Apache's mod_unique
  35   module or will be generated by Mediawiki itself (depending on the set-up).
  36 * $wgEnableSpecialMute (T218265) - This configuration controls whether
  37   Special:Mute is available and whether to include a link to it on emails
  38   originating from Special:Email.
  39
  40 ==== Changed configuration ====
  41 * $wgUseCdn, $wgCdnServers, $wgCdnServersNoPurge, and $wgCdnMaxAge – These four
  42   CDN-related config variables have been renamed from being specific to Squid –
  43   they were previously $wgUseSquid, $wgSquidServers, $wgSquidServersNoPurge, and
  44   $wgSquidMaxage respectively. This aligns them with the related existing
  45   variable $wgCdnMaxageLagged. The previous configuration variable names are
  46   deprecated, but will be used as the fall back if they are still set.
  47   Note that wgSquidPurgeUseHostHeader has not been renamed, as it is deprecated.
  48 * (T27707) File type checks for image uploads have been relaxed to allow files
  49   containing some HTML markup in metadata. As a result, the $wgAllowTitlesInSVG
  50   setting is no longer applied and is now always true. Note that MSIE 7 may
  51   still be able to misinterpret certain malformed PNG files as HTML.
  52 * Introduced $wgVerifyMimeTypeIE to allow disabling the MSIE 6/7 file type
  53   detection heuristic on upload, which is more conservative than the checks
  54   that were changed above.
  55 * $wgSkipSkin — Setting this instead of $wgSkipSkins, deprecated in 1.23, is now
  56   hard-deprecated.
  57 * $wgLocalInterwiki — Setting this instead of $wgLocalInterwikis, deprecated in
  58   1.23, is now hard-deprecated.
  59 * $wgProfileOnly — Setting this, deprecated in 1.23, is now hard-deprecated.
  60   Instead, set the log file in $wgDebugLogGroups['profileoutput'].
  61 * …
  62
  63 ==== Removed configuration ====
  64 * $wgWikiDiff2MovedParagraphDetectionCutoff — If you still want a custom change
  65   size threshold, please specify in php.ini, using the configuration variable
  66   wikidiff2.moved_paragraph_detection_cutoff.
  67 * $wgDebugPrintHttpHeaders - The default of including HTTP headers in the
  68   debug log channel is no longer configurable. The debug log itself remains
  69   configurable via $wgDebugLogFile.
  70
  71 === New user-facing features in 1.34 ===
  72 * Special:Mute has been added as a quick way for users to block unwanted emails
  73   from other users originating from Special:EmailUser.
  74
  75 === New developer features in 1.34 ===
  76 * The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification
  77   of headers in private wikis.
  78 * Language::formatTimePeriod now supports the new 'avoidhours' option to output
  79   strings like "5 days ago" instead of "5 days 13 hours ago".
  80
  81 === External library changes in 1.34 ===
  82
  83 ==== New external libraries ====
  84 * …
  85
  86 ==== Changed external libraries ====
  87 * Updated Mustache from 1.0.0 to v3.0.1.
  88 * Updated OOUI from v0.31.3 to v0.33.2.
  89 * Updated composer/semver from 1.4.2 to 1.5.0.
  90 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
  91 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
  92 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
  93 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
  94 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
  95 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
  96 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
  97 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
  98 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
  99 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
 100 * …
 101
 102 ==== Removed external libraries ====
 103 * The jquery.async module, deprecated in 1.33, was removed.
 104 * …
 105
 106 === Bug fixes in 1.34 ===
 107 * (T222529) If a log entry or page revision is recorded in the database with an
 108   empty username, attempting to display it will log an error and return a "no
 109   username available" to the user instead of silently displaying nothing or
 110   invalid links.
 111
 112 === Action API changes in 1.34 ===
 113 * The 'recenteditcount' response property from action=query list=allusers,
 114   deprecated in 1.25, has been removed.
 115
 116 === Action API internal changes in 1.34 ===
 117 * …
 118
 119 === Languages updated in 1.34 ===
 120 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 121 Below only new and removed languages are listed, as well as changes to languages
 122 because of Phabricator reports.
 123
 124 * (T152908) Added language support for N'Ko (nqo).
 125
 126 === Breaking changes in 1.34 ===
 127 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 128   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 129   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 130 * Preferences class, deprecated in 1.31, has been removed.
 131 * The following parts of code, deprecated in 1.32, were removed in favor of
 132   built-in PHP functions:
 133   * CryptRand class
 134   * CryptRand service
 135   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 136 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 137   create a new Language object with a different language code.
 138 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 139   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 140   Instead, reset services, such as by calling $this->overrideMwServices() (if
 141   your test extends MediaWikiTestCase). Services will generally not pick up
 142   configuration changes from after they were created, so you must reset
 143   services after any configuration change. Even if your code works now, it is
 144   likely to break in future versions as more code is moved to services.
 145 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 146 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 147   been removed.
 148 * ObjectFactory class, deprecated in 1.31, has been removed.
 149 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 150 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 151 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 152   This behavior was removed, and the method now matches the parent signature
 153   (SpecialPage::execute) which is to return HTML string or void.
 154   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 155 * The 'recenteditcount' response property from action API action=query
 156   list=allusers, deprecated in 1.25, has been removed.
 157 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 158   SearchEngine::create(), SearchEngine::getSearchTypes() and
 159   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 160 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 161 * User::randomPassword() method, deprecated in 1.27, have been removed.
 162 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 163 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 164 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 165   removed.
 166 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 167 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 168   User objects to taking UserIdentity objects. Extensions implementing this
 169   interface need to be changed accordingly.
 170 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 171   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 172 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 173   UserGroupMembership::getLink() instead.
 174 * SavepointPostgres, deprecated in 1.31, has been removed.
 175 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 176   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 177   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 178   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 179 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 180   have been removed.
 181 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 182   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 183   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 184   ::showFileNotFoundError().
 185 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 186 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 187   INTL_ICU_VERSION constant directly.
 188 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 189 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 190   both deprecated in 1.32, have been removed.
 191 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 192   been removed. Use ->msg() or ->getMsg() instead.
 193 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 194   use WatchAction::getWatchToken() with action 'unwatch' directly.
 195 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 196   1.28, have been removed.
 197 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 198   deprecated in 1.32, have been removed.
 199 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 200   in 1.33, have been removed.
 201 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 202 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 203   removed.
 204 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 205 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 206 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 207 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 208 * The Block typehint only refers to blocks stored in the database. It should be
 209   updated to AbstractBlock in cases where any type of block could be expected.
 210 * FileRepoStatus, deprecated in 1.25, has been removed.
 211 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 212   in 1.27, has been removed.
 213 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 214 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 215   was deprecated in 1.25.
 216 * The jquery.byteLength module, deprecated in 1.31, was removed.
 217   Use the mediawiki.String module instead.
 218 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 219   Use require( 'mediawiki.language.specialCharacters' ) instead.
 220 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 221   directly.
 222 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 223   getErrorsOrWarnings() instead.
 224 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 225   SpecialPage::getPageTitle() instead.
 226 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 227   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 228   which are no longer used, have now been removed.
 229 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 230   specified, deprecated in 1.30, have been removed.
 231 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 232 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 233 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 234   removed. Use NS_FILE and NS_FILE_TALK respectively.
 235 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 236   (deprecated in 1.32) have been removed. Closures should be used instead.
 237 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 238   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 239   removed.
 240 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 241   method, deprecated in 1.32, have been removed.
 242 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 243 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 244   Parser::fetchFileAndTitle() instead.
 245 * The global function wfBCP47, deprecated in 1.31, has been removed.
 246 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 247   \Maintenance::countDown() method instead.
 248 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 249   deprecated since 1.20.
 250 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 251 * Linker::link() no longer accepts a string for the query array, as was
 252   deprecated in 1.20.
 253 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 254   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 255 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 256   UserGroupsChanged hook.
 257 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 258   instance from MediaWikiServices instead.
 259 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 260 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 261   Use MediaWiki\Session\SessionManager instead.
 262 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 263   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 264 * The internal method OutputPage->addScriptFile() will no longer silently drop
 265   calls that use an invalid path (i.e., something other than an absolute path,
 266   protocol-relative URL, or full scheme URL), and will instead pass them to the
 267   client where they will likely 404. This usage was deprecated in 1.24.
 268 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 269 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 270   EditFilterMergedContent hook for an alternative way to use this feature.
 271 * API module methods getDescription(), getParamDescription(), & getExamples(),
 272   all deprecated in 1.25 and ignored, have been removed.
 273 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 274   removed.
 275 * The JavaScript global variable wgLoadScript has been removed. Use
 276   mw.util.wikiScript( 'load' ) instead.
 277 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 278   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 279   in JavaScript, use mw.log.deprecate() instead.
 280 * The 'user.groups' module, deprecated in 1.28, was removed.
 281   Use the 'user' module instead.
 282 * The ability to override User::$mRights has been removed. Use
 283   PermissionManager::addTemporaryUserRights() instead.
 284 * Previously, when iterating ResultWrapper with foreach() or a similar
 285   construct, the range of the index was 1..numRows. This has been fixed to be
 286   0..(numRows-1).
 287 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 288   AuthChangeFormFields hook or security levels instead.
 289 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 290   Use WikiMap::getWikiIdFromDbDomain() instead.
 291 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 292   which were deprecated and ignored by core since 1.22, are no longer set to any
 293   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 294   updated since 2013 to cope with this deprecation may now break.
 295 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 296   or $wgResourceModules is no longer supported.
 297   Use the 'class' or 'factory' option of the array format instead.
 298 * The parameter $lang of the functions generateTOC and tocList in Linker and
 299   DummyLinker must be in type Language when present. Other types are
 300   deprecated since 1.33.
 301 * The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29,
 302   have been removed.
 303 * …
 304
 305 === Deprecations in 1.34 ===
 306 * The MWNamespace class is deprecated. Use NamespaceInfo.
 307 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 308   Instead, use ->queue().
 309 * User::isBlocked() is deprecated since it does not tell you if the user is
 310   blocked from editing a particular page. Use User::getBlock() or
 311   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 312 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 313   to the BlockManager as private helper methods.
 314 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 315   instead.
 316 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 317   is deprecated. Pass only the User argument.
 318 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 319 * Passing a Title as the first parameter to the getTimestampById method of
 320   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 321 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 322   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 323 * The Title parameter to RevisionLookup::getPreviousRevision and
 324   RevisionLookup::getNextRevision is deprecated and should be omitted.
 325 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 326 * The Http class is deprecated. For the request, get, and post methods, use
 327   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 328   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 329   MultiHttpClient directly.
 330 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 331   engine will eventually be made the only engine for HTTP requests.
 332 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 333   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 334   deprecated. Use MediaWikiServices instead.
 335 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 336   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 337 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 338 * The Block class is separated into DatabaseBlock (for blocks stored in the
 339   database), and SystemBlock (for temporary blocks created by the system).
 340   SystemBlock should be used when creating any temporary blocks. Block is
 341   a deprecated alias for DatabaseBlock.
 342 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 343   Some context can be found at T224165.
 344 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 345 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 346   MovePage::moveSubpagesIfAllowed.
 347 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 348 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 349 * Language::viewPrevNext function is deprecated, use
 350   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 351 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 352   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 353 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 354   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 355   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 356 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 357   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 358   instead. Elsewhere, use the methods from the ResourceLoader class.
 359 * The Preprocessor_DOM implementation has been deprecated.  It will be
 360   removed in a future release.  Use the Preprocessor_Hash implementation
 361   instead.
 362 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 363   have been deprecated; they will be made private in the future.
 364 * SearchResult::termMatches() method is deprecated. It was unreliable because
 365   only populated by few search engine implementations. Use
 366   SqlSearchResult::getTermMatches() if really needed.
 367 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 368   and should no longer be passed. Search engine implemenations should be
 369   responsible for carrying relevant information needed for highlighting with
 370   their own SearchResultSet/SearchResult sub-classes.
 371 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 372   SearchDatabase.
 373 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 374   hooks is highly discouraged as it's only populated by SearchDatabase search
 375   engines.
 376 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 377   template option 'searchaction' instead.
 378 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 379   been deprecated.
 380 * User::getRights() and User::$mRights have been deprecated. Use
 381   PermissionManager::getUserPermissions() instead.
 382 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 383   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 384
 385 === Other changes in 1.34 ===
 386 * …
 387
 388 == Compatibility ==
 389 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 390 supported, it is generally advised to use PHP 7.0.13 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 3.8.0 or later
 402 * Oracle 9.0.1 or later
 403 * Microsoft SQL Server 2005 (9.00.1399)
 404
 405 == Online documentation ==
 406 Documentation for both end-users and site administrators is available on
 407 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 408 for pages that explicitly state that their contents are in the public domain):
 409
 410        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 411
 412 == Mailing list ==
 413 A mailing list is available for MediaWiki user support and discussion:
 414
 415        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 416
 417 A low-traffic announcements-only list is also available:
 418
 419        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 420
 421 It's highly recommended that you sign up for one of these lists if you're
 422 going to run a public MediaWiki, so you can be notified of security fixes.
 423
 424 == IRC help ==
 425 There's usually someone online in #mediawiki on irc.freenode.net.