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 * editmyuserjsredirect user right – users without this right now cannot edit JS
  40   redirects in their userspace unless the target of the redirect is also in
  41   their userspace. By default, this right is given to everyone.
  42
  43 ==== Changed configuration ====
  44 * $wgUseCdn, $wgCdnServers, $wgCdnServersNoPurge, and $wgCdnMaxAge – These four
  45   CDN-related config variables have been renamed from being specific to Squid –
  46   they were previously $wgUseSquid, $wgSquidServers, $wgSquidServersNoPurge, and
  47   $wgSquidMaxage respectively. This aligns them with the related existing
  48   variable $wgCdnMaxageLagged. The previous configuration variable names are
  49   deprecated, but will be used as the fall back if they are still set.
  50   Note that wgSquidPurgeUseHostHeader has not been renamed, as it is deprecated.
  51 * (T27707) File type checks for image uploads have been relaxed to allow files
  52   containing some HTML markup in metadata. As a result, the $wgAllowTitlesInSVG
  53   setting is no longer applied and is now always true. Note that MSIE 7 may
  54   still be able to misinterpret certain malformed PNG files as HTML.
  55 * Introduced $wgVerifyMimeTypeIE to allow disabling the MSIE 6/7 file type
  56   detection heuristic on upload, which is more conservative than the checks
  57   that were changed above.
  58 * $wgSkipSkin — Setting this instead of $wgSkipSkins, deprecated in 1.23, is now
  59   hard-deprecated.
  60 * $wgLocalInterwiki — Setting this instead of $wgLocalInterwikis, deprecated in
  61   1.23, is now hard-deprecated.
  62 * $wgProfileOnly — Setting this, deprecated in 1.23, is now hard-deprecated.
  63   Instead, set the log file in $wgDebugLogGroups['profileoutput'].
  64 * …
  65
  66 ==== Removed configuration ====
  67 * $wgWikiDiff2MovedParagraphDetectionCutoff — If you still want a custom change
  68   size threshold, please specify in php.ini, using the configuration variable
  69   wikidiff2.moved_paragraph_detection_cutoff.
  70 * $wgDebugPrintHttpHeaders - The default of including HTTP headers in the
  71   debug log channel is no longer configurable. The debug log itself remains
  72   configurable via $wgDebugLogFile.
  73
  74 === New user-facing features in 1.34 ===
  75 * Special:Mute has been added as a quick way for users to block unwanted emails
  76   from other users originating from Special:EmailUser.
  77
  78 === New developer features in 1.34 ===
  79 * The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification
  80   of headers in private wikis.
  81 * Language::formatTimePeriod now supports the new 'avoidhours' option to output
  82   strings like "5 days ago" instead of "5 days 13 hours ago".
  83 * (T220163) Added SpecialMuteModifyFormFields hook to allow extensions
  84   to add fields to Special:Mute.
  85
  86 === External library changes in 1.34 ===
  87
  88 ==== New external libraries ====
  89 * …
  90
  91 ==== Changed external libraries ====
  92 * Updated Mustache from 1.0.0 to v3.0.1.
  93 * Updated OOUI from v0.31.3 to v0.33.2.
  94 * Updated composer/semver from 1.4.2 to 1.5.0.
  95 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
  96 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
  97 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
  98 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
  99 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
 100 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
 101 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
 102 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
 103 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
 104 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
 105 * …
 106
 107 ==== Removed external libraries ====
 108 * The jquery.async module, deprecated in 1.33, was removed.
 109 * …
 110
 111 === Bug fixes in 1.34 ===
 112 * (T222529) If a log entry or page revision is recorded in the database with an
 113   empty username, attempting to display it will log an error and return a "no
 114   username available" to the user instead of silently displaying nothing or
 115   invalid links.
 116
 117 === Action API changes in 1.34 ===
 118 * The 'recenteditcount' response property from action=query list=allusers,
 119   deprecated in 1.25, has been removed.
 120
 121 === Action API internal changes in 1.34 ===
 122 * …
 123
 124 === Languages updated in 1.34 ===
 125 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 126 Below only new and removed languages are listed, as well as changes to languages
 127 because of Phabricator reports.
 128
 129 * (T152908) Added language support for N'Ko (nqo).
 130
 131 === Breaking changes in 1.34 ===
 132 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 133   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 134   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 135 * Preferences class, deprecated in 1.31, has been removed.
 136 * The following parts of code, deprecated in 1.32, were removed in favor of
 137   built-in PHP functions:
 138   * CryptRand class
 139   * CryptRand service
 140   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 141 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 142   create a new Language object with a different language code.
 143 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 144   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 145   Instead, reset services, such as by calling $this->overrideMwServices() (if
 146   your test extends MediaWikiTestCase). Services will generally not pick up
 147   configuration changes from after they were created, so you must reset
 148   services after any configuration change. Even if your code works now, it is
 149   likely to break in future versions as more code is moved to services.
 150 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 151 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 152   been removed.
 153 * ObjectFactory class, deprecated in 1.31, has been removed.
 154 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 155 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 156 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 157   This behavior was removed, and the method now matches the parent signature
 158   (SpecialPage::execute) which is to return HTML string or void.
 159   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 160 * The 'recenteditcount' response property from action API action=query
 161   list=allusers, deprecated in 1.25, has been removed.
 162 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 163   SearchEngine::create(), SearchEngine::getSearchTypes() and
 164   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 165 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 166 * User::randomPassword() method, deprecated in 1.27, have been removed.
 167 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 168 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 169 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 170   removed.
 171 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 172 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 173   User objects to taking UserIdentity objects. Extensions implementing this
 174   interface need to be changed accordingly.
 175 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 176   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 177 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 178   UserGroupMembership::getLink() instead.
 179 * SavepointPostgres, deprecated in 1.31, has been removed.
 180 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 181   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 182   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 183   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 184 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 185   have been removed.
 186 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 187   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 188   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 189   ::showFileNotFoundError().
 190 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 191 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 192   INTL_ICU_VERSION constant directly.
 193 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 194 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 195   both deprecated in 1.32, have been removed.
 196 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 197   been removed. Use ->msg() or ->getMsg() instead.
 198 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 199   use WatchAction::getWatchToken() with action 'unwatch' directly.
 200 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 201   1.28, have been removed.
 202 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 203   deprecated in 1.32, have been removed.
 204 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 205   in 1.33, have been removed.
 206 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 207 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 208   removed.
 209 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 210 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 211 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 212 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 213 * The Block typehint only refers to blocks stored in the database. It should be
 214   updated to AbstractBlock in cases where any type of block could be expected.
 215 * FileRepoStatus, deprecated in 1.25, has been removed.
 216 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 217   in 1.27, has been removed.
 218 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 219 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 220   was deprecated in 1.25.
 221 * The jquery.byteLength module, deprecated in 1.31, was removed.
 222   Use the mediawiki.String module instead.
 223 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 224   Use require( 'mediawiki.language.specialCharacters' ) instead.
 225 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 226   directly.
 227 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 228   getErrorsOrWarnings() instead.
 229 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 230   SpecialPage::getPageTitle() instead.
 231 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 232   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 233   which are no longer used, have now been removed.
 234 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 235   specified, deprecated in 1.30, have been removed.
 236 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 237 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 238 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 239   removed. Use NS_FILE and NS_FILE_TALK respectively.
 240 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 241   (deprecated in 1.32) have been removed. Closures should be used instead.
 242 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 243   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 244   removed.
 245 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 246   method, deprecated in 1.32, have been removed.
 247 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 248 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 249   Parser::fetchFileAndTitle() instead.
 250 * The global function wfBCP47, deprecated in 1.31, has been removed.
 251 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 252   \Maintenance::countDown() method instead.
 253 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 254   deprecated since 1.20.
 255 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 256 * Linker::link() no longer accepts a string for the query array, as was
 257   deprecated in 1.20.
 258 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 259   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 260 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 261   UserGroupsChanged hook.
 262 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 263   instance from MediaWikiServices instead.
 264 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 265 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 266   Use MediaWiki\Session\SessionManager instead.
 267 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 268   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 269 * The internal method OutputPage->addScriptFile() will no longer silently drop
 270   calls that use an invalid path (i.e., something other than an absolute path,
 271   protocol-relative URL, or full scheme URL), and will instead pass them to the
 272   client where they will likely 404. This usage was deprecated in 1.24.
 273 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 274 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 275   EditFilterMergedContent hook for an alternative way to use this feature.
 276 * API module methods getDescription(), getParamDescription(), & getExamples(),
 277   all deprecated in 1.25 and ignored, have been removed.
 278 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 279   removed.
 280 * The JavaScript global variable wgLoadScript has been removed. Use
 281   mw.util.wikiScript( 'load' ) instead.
 282 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 283   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 284   in JavaScript, use mw.log.deprecate() instead.
 285 * The 'user.groups' module, deprecated in 1.28, was removed.
 286   Use the 'user' module instead.
 287 * The ability to override User::$mRights has been removed. Use
 288   PermissionManager::addTemporaryUserRights() instead.
 289 * Previously, when iterating ResultWrapper with foreach() or a similar
 290   construct, the range of the index was 1..numRows. This has been fixed to be
 291   0..(numRows-1).
 292 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 293   AuthChangeFormFields hook or security levels instead.
 294 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 295   Use WikiMap::getWikiIdFromDbDomain() instead.
 296 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 297   which were deprecated and ignored by core since 1.22, are no longer set to any
 298   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 299   updated since 2013 to cope with this deprecation may now break.
 300 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 301   or $wgResourceModules is no longer supported.
 302   Use the 'class' or 'factory' option of the array format instead.
 303 * The parameter $lang of the functions generateTOC and tocList in Linker and
 304   DummyLinker must be in type Language when present. Other types are
 305   deprecated since 1.33.
 306 * The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29,
 307   have been removed.
 308 * The UploadVerification hook, deprecated in 1.28, has been removed. Instead,
 309   use the UploadVerifyFile hook.
 310 * UploadBase:: and UploadFromChunks::stashFileGetKey() and stashSession(),
 311   deprecated in 1.28, have been removed. Instead, please use the getFileKey()
 312   method on the response from doStashFile().
 313 * …
 314
 315 === Deprecations in 1.34 ===
 316 * The MWNamespace class is deprecated. Use NamespaceInfo.
 317 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 318   Instead, use ->queue().
 319 * User::isBlocked() is deprecated since it does not tell you if the user is
 320   blocked from editing a particular page. Use User::getBlock() or
 321   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 322 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 323   to the BlockManager as private helper methods.
 324 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 325   instead.
 326 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 327   is deprecated. Pass only the User argument.
 328 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 329 * Passing a Title as the first parameter to the getTimestampById method of
 330   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 331 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 332   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 333 * The Title parameter to RevisionLookup::getPreviousRevision and
 334   RevisionLookup::getNextRevision is deprecated and should be omitted.
 335 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 336 * The Http class is deprecated. For the request, get, and post methods, use
 337   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 338   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 339   MultiHttpClient directly.
 340 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 341   engine will eventually be made the only engine for HTTP requests.
 342 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 343   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 344   deprecated. Use MediaWikiServices instead.
 345 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 346   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 347 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 348 * The Block class is separated into DatabaseBlock (for blocks stored in the
 349   database), and SystemBlock (for temporary blocks created by the system).
 350   SystemBlock should be used when creating any temporary blocks. Block is
 351   a deprecated alias for DatabaseBlock.
 352 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 353   Some context can be found at T224165.
 354 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 355 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 356   MovePage::moveSubpagesIfAllowed.
 357 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 358 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 359 * Language::viewPrevNext function is deprecated, use
 360   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 361 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 362   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 363 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 364   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 365   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 366 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 367   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 368   instead. Elsewhere, use the methods from the ResourceLoader class.
 369 * The Preprocessor_DOM implementation has been deprecated.  It will be
 370   removed in a future release.  Use the Preprocessor_Hash implementation
 371   instead.
 372 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 373   have been deprecated; they will be made private in the future.
 374 * SearchResult::termMatches() method is deprecated. It was unreliable because
 375   only populated by few search engine implementations. Use
 376   SqlSearchResult::getTermMatches() if really needed.
 377 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 378   and should no longer be passed. Search engine implemenations should be
 379   responsible for carrying relevant information needed for highlighting with
 380   their own SearchResultSet/SearchResult sub-classes.
 381 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 382   SearchDatabase.
 383 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 384   hooks is highly discouraged as it's only populated by SearchDatabase search
 385   engines.
 386 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 387   template option 'searchaction' instead.
 388 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 389   been deprecated.
 390 * User::getRights() and User::$mRights have been deprecated. Use
 391   PermissionManager::getUserPermissions() instead.
 392 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 393   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 394
 395 === Other changes in 1.34 ===
 396 * …
 397
 398 == Compatibility ==
 399 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 400 supported, it is generally advised to use PHP 7.0.13 or later for long term
 401 support.
 402
 403 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 404 but support for them is somewhat less mature. There is experimental support for
 405 Oracle and Microsoft SQL Server.
 406
 407 The supported versions are:
 408
 409 * MySQL 5.5.8 or later
 410 * PostgreSQL 9.2 or later
 411 * SQLite 3.8.0 or later
 412 * Oracle 9.0.1 or later
 413 * Microsoft SQL Server 2005 (9.00.1399)
 414
 415 == Online documentation ==
 416 Documentation for both end-users and site administrators is available on
 417 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 418 for pages that explicitly state that their contents are in the public domain):
 419
 420        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 421
 422 == Mailing list ==
 423 A mailing list is available for MediaWiki user support and discussion:
 424
 425        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 426
 427 A low-traffic announcements-only list is also available:
 428
 429        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 430
 431 It's highly recommended that you sign up for one of these lists if you're
 432 going to run a public MediaWiki, so you can be notified of security fixes.
 433
 434 == IRC help ==
 435 There's usually someone online in #mediawiki on irc.freenode.net.