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 * (T226733) Add rate limiter to Special:ConfirmEmail.
  43
  44 ==== Changed configuration ====
  45 * $wgUseCdn, $wgCdnServers, $wgCdnServersNoPurge, and $wgCdnMaxAge – These four
  46   CDN-related config variables have been renamed from being specific to Squid –
  47   they were previously $wgUseSquid, $wgSquidServers, $wgSquidServersNoPurge, and
  48   $wgSquidMaxage respectively. This aligns them with the related existing
  49   variable $wgCdnMaxageLagged. The previous configuration variable names are
  50   deprecated, but will be used as the fall back if they are still set.
  51   Note that wgSquidPurgeUseHostHeader has not been renamed, as it is deprecated.
  52 * (T27707) File type checks for image uploads have been relaxed to allow files
  53   containing some HTML markup in metadata. As a result, the $wgAllowTitlesInSVG
  54   setting is no longer applied and is now always true. Note that MSIE 7 may
  55   still be able to misinterpret certain malformed PNG files as HTML.
  56 * Introduced $wgVerifyMimeTypeIE to allow disabling the MSIE 6/7 file type
  57   detection heuristic on upload, which is more conservative than the checks
  58   that were changed above.
  59 * $wgSkipSkin — Setting this instead of $wgSkipSkins, deprecated in 1.23, is now
  60   hard-deprecated.
  61 * $wgLocalInterwiki — Setting this instead of $wgLocalInterwikis, deprecated in
  62   1.23, is now hard-deprecated.
  63 * $wgProfileOnly — Setting this, deprecated in 1.23, is now hard-deprecated.
  64   Instead, set the log file in $wgDebugLogGroups['profileoutput'].
  65 * $wgProxyList — Setting this to an array with IP addresses in the array keys,
  66   which was deprecated in 1.30, no longer works. Instead, $wgProxyList should be
  67   an array with IP addresses as the values, or a string path to a file
  68   containing one IP address per line.
  69 * …
  70
  71 ==== Removed configuration ====
  72 * $wgWikiDiff2MovedParagraphDetectionCutoff — If you still want a custom change
  73   size threshold, please specify in php.ini, using the configuration variable
  74   wikidiff2.moved_paragraph_detection_cutoff.
  75 * $wgDebugPrintHttpHeaders - The default of including HTTP headers in the
  76   debug log channel is no longer configurable. The debug log itself remains
  77   configurable via $wgDebugLogFile.
  78 * $wgMsgCacheExpiry - The MessageCache uses 24 hours as the expiry for values
  79   stored in WANObjectCache. This is no longer configurable.
  80 * $wgPasswordSalt – This setting, used for migrating exceptionally old, insecure
  81   password setups and deprecated since 1.24, is now removed.
  82 * $wgDBOracleDRCP - If you must use persistent connections, set DBO_PERSISTENT
  83   in the 'flags' field for servers in $wgDBServers (or $wgLBFactoryConf).
  84
  85 === New user-facing features in 1.34 ===
  86 * Special:Mute has been added as a quick way for users to block unwanted emails
  87   from other users originating from Special:EmailUser.
  88 * (T207577) Special:NewSection has been created as a shortcut to creating a new
  89   section on a page. When linked to, its subpage is used as the target
  90   ([[Special:NewSection/Test]] redirects to creating a new section in "Test").
  91   Otherwise, it displays a basic interface to allow the end user to specify
  92   the target manually.
  93 * (T220447) Special:Contributions/newbies has been removed for performance and
  94   usefulness reasons. Use Special:RecentChanges?userExpLevel=newcomer instead.
  95 * Special:NewFiles/newbies has been removed for performance and usefulness
  96   reasons. Use Special:RecentChanges?userExpLevel=newcomer&namespace=6 instead.
  97
  98 === New developer features in 1.34 ===
  99 * The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification
 100   of headers in private wikis.
 101 * Language::formatTimePeriod now supports the new 'avoidhours' option to output
 102   strings like "5 days ago" instead of "5 days 13 hours ago".
 103 * (T220163) Added SpecialMuteModifyFormFields hook to allow extensions
 104   to add fields to Special:Mute.
 105 * (T100896) Skin authors can define custom OOUI themes using OOUIThemePaths.
 106   See <https://www.mediawiki.org/wiki/OOUI/Themes> for details.
 107 * (T229035) The GetUserBlock hook was added. Use this instead of
 108   GetBlockedStatus.
 109 * ObjectFactory is available as a service. When used as a service, the object
 110   specs can now specify needed DI services.
 111
 112 === External library changes in 1.34 ===
 113
 114 ==== New external libraries ====
 115 * …
 116
 117 ==== Changed external libraries ====
 118 * Updated Mustache from 1.0.0 to v3.0.1.
 119 * Updated OOUI from v0.31.3 to v0.33.4.
 120 * Updated composer/semver from 1.4.2 to 1.5.0.
 121 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
 122 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
 123 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
 124 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
 125 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
 126 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
 127 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
 128 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
 129 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
 130 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
 131 * …
 132
 133 ==== Removed external libraries ====
 134 * The jquery.async module, deprecated in 1.33, was removed.
 135 * …
 136
 137 === Bug fixes in 1.34 ===
 138 * (T222529) If a log entry or page revision is recorded in the database with an
 139   empty username, attempting to display it will log an error and return a "no
 140   username available" to the user instead of silently displaying nothing or
 141   invalid links.
 142
 143 === Action API changes in 1.34 ===
 144 * The 'recenteditcount' response property from action=query list=allusers,
 145   deprecated in 1.25, has been removed.
 146
 147 === Action API internal changes in 1.34 ===
 148 * …
 149
 150 === Languages updated in 1.34 ===
 151 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 152 Below only new and removed languages are listed, as well as changes to languages
 153 because of Phabricator reports.
 154
 155 * (T152908) Added language support for N'Ko (nqo).
 156
 157 === Breaking changes in 1.34 ===
 158 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 159   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 160   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 161 * Preferences class, deprecated in 1.31, has been removed.
 162 * The following parts of code, deprecated in 1.32, were removed in favor of
 163   built-in PHP functions:
 164   * CryptRand class
 165   * CryptRand service
 166   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 167 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 168   create a new Language object with a different language code.
 169 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 170   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 171   Instead, reset services, such as by calling $this->overrideMwServices() (if
 172   your test extends MediaWikiTestCase). Services will generally not pick up
 173   configuration changes from after they were created, so you must reset
 174   services after any configuration change. Even if your code works now, it is
 175   likely to break in future versions as more code is moved to services.
 176 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 177 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 178   been removed.
 179 * ObjectFactory class, deprecated in 1.31, has been removed.
 180 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 181 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 182 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 183   This behavior was removed, and the method now matches the parent signature
 184   (SpecialPage::execute) which is to return HTML string or void.
 185   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 186 * The 'recenteditcount' response property from action API action=query
 187   list=allusers, deprecated in 1.25, has been removed.
 188 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 189   SearchEngine::create(), SearchEngine::getSearchTypes() and
 190   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 191 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 192 * User::randomPassword() method, deprecated in 1.27, have been removed.
 193 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 194 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 195 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 196   removed.
 197 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 198 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 199   User objects to taking UserIdentity objects. Extensions implementing this
 200   interface need to be changed accordingly.
 201 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 202   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 203 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 204   UserGroupMembership::getLink() instead.
 205 * SavepointPostgres, deprecated in 1.31, has been removed.
 206 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 207   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 208   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 209   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 210 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 211   have been removed.
 212 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 213   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 214   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 215   ::showFileNotFoundError().
 216 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 217 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 218   INTL_ICU_VERSION constant directly.
 219 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 220 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 221   both deprecated in 1.32, have been removed.
 222 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 223   been removed. Use ->msg() or ->getMsg() instead.
 224 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 225   use WatchAction::getWatchToken() with action 'unwatch' directly.
 226 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 227   1.28, have been removed.
 228 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 229   deprecated in 1.32, have been removed.
 230 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 231   in 1.33, have been removed.
 232 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 233 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 234   removed.
 235 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 236 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 237 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 238 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 239 * The Block typehint only refers to blocks stored in the database. It should be
 240   updated to AbstractBlock in cases where any type of block could be expected.
 241 * FileRepoStatus, deprecated in 1.25, has been removed.
 242 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 243   in 1.27, has been removed.
 244 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 245 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 246   was deprecated in 1.25.
 247 * The jquery.byteLength module, deprecated in 1.31, was removed.
 248   Use the mediawiki.String module instead.
 249 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 250   Use require( 'mediawiki.language.specialCharacters' ) instead.
 251 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 252   directly.
 253 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 254   getErrorsOrWarnings() instead.
 255 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 256   SpecialPage::getPageTitle() instead.
 257 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 258   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 259   which are no longer used, have now been removed.
 260 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 261   specified, deprecated in 1.30, have been removed.
 262 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 263 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 264 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 265   removed. Use NS_FILE and NS_FILE_TALK respectively.
 266 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 267   (deprecated in 1.32) have been removed. Closures should be used instead.
 268 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 269   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 270   removed.
 271 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 272   method, deprecated in 1.32, have been removed.
 273 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 274 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 275   Parser::fetchFileAndTitle() instead.
 276 * The global function wfBCP47, deprecated in 1.31, has been removed.
 277 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 278   \Maintenance::countDown() method instead.
 279 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 280   deprecated since 1.20.
 281 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 282 * Linker::link() no longer accepts a string for the query array, as was
 283   deprecated in 1.20.
 284 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 285   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 286 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 287   UserGroupsChanged hook.
 288 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 289   instance from MediaWikiServices instead.
 290 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 291 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 292   Use MediaWiki\Session\SessionManager instead.
 293 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 294   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 295 * The internal method OutputPage->addScriptFile() will no longer silently drop
 296   calls that use an invalid path (i.e., something other than an absolute path,
 297   protocol-relative URL, or full scheme URL), and will instead pass them to the
 298   client where they will likely 404. This usage was deprecated in 1.24.
 299 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 300 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 301   EditFilterMergedContent hook for an alternative way to use this feature.
 302 * API module methods getDescription(), getParamDescription(), & getExamples(),
 303   all deprecated in 1.25 and ignored, have been removed.
 304 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 305   removed.
 306 * The JavaScript global variable wgLoadScript has been removed. Use
 307   mw.util.wikiScript( 'load' ) instead.
 308 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 309   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 310   in JavaScript, use mw.log.deprecate() instead.
 311 * The 'user.groups' module, deprecated in 1.28, was removed.
 312   Use the 'user' module instead.
 313 * The ResourceLoaderContext::expandModuleNames method, deprecated in 1.33, was
 314   removed. Use ResourceLoader::expandModuleNames instead.
 315 * The ability to override User::$mRights has been removed. Use
 316   PermissionManager::addTemporaryUserRights() instead.
 317 * Previously, when iterating ResultWrapper with foreach() or a similar
 318   construct, the range of the index was 1..numRows. This has been fixed to be
 319   0..(numRows-1).
 320 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 321   AuthChangeFormFields hook or security levels instead.
 322 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 323   Use WikiMap::getWikiIdFromDbDomain() instead.
 324 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 325   which were deprecated and ignored by core since 1.22, are no longer set to any
 326   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 327   updated since 2013 to cope with this deprecation may now break.
 328 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 329   or $wgResourceModules is no longer supported.
 330   Use the 'class' or 'factory' option of the array format instead.
 331 * The parameter $lang of the functions generateTOC and tocList in Linker and
 332   DummyLinker must be in type Language when present. Other types are
 333   deprecated since 1.33.
 334 * The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29,
 335   have been removed.
 336 * ParserOption::getSpeculativeRevIdCallback(), deprecated in 1.28, has been
 337   removed.
 338 * The UploadVerification hook, deprecated in 1.28, has been removed. Instead,
 339   use the UploadVerifyFile hook.
 340 * UploadBase:: and UploadFromChunks::stashFileGetKey() and stashSession(),
 341   deprecated in 1.28, have been removed. Instead, please use the getFileKey()
 342   method on the response from doStashFile().
 343 * LBFactory::setDomainPrefix() and LoadBalancer::setDomainPrefix(), deprecated
 344   in 1.33, have been removed. Use setLocalDomainPrefix() instead.
 345 * IDatabase::implicitGroupby(), deprecated in 1.30, has been removed.
 346 * IDatabase::doneWrites(), deprecated in 1.31, has been removed.
 347   Use IDatabase::lastDoneWrites() instead.
 348 * Database::reportConnectionError(), deprecated in 1.32, has been removed.
 349 * LoadBalancer::laggedSlaveUsed(), deprecated in 1.28, has been removed.
 350   Use LoadBalancer::laggedReplicaUsed() instead.
 351 * Database::getProperty(), deprecated in 1.28, has been removed.
 352 * IDatabase::getWikiId(), deprecated in 1.30, has been removed.
 353   Use IDatabase::getDomainID() instead.
 354 * (T191231) Support for using Oracle or MSSQL as database backends has been
 355   dropped.
 356 * MessageCache::destroyInstance() has been removed. Instead, call
 357   MediaWikiTestCase::resetServices().
 358 * SearchResult protected field $searchEngine is removed and no longer
 359   initialized after calling SearchResult::initFromTitle().
 360 * The UserIsBlockedFrom hook is only called if a block is found first, and
 361   should only be used to unblock a blocked user.
 362 * …
 363
 364 === Deprecations in 1.34 ===
 365 * The MWNamespace class is deprecated. Use NamespaceInfo.
 366 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 367   Instead, use ->queue().
 368 * User::isBlocked() is deprecated since it does not tell you if the user is
 369   blocked from editing a particular page. Use User::getBlock() or
 370   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 371 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 372   to the BlockManager as private helper methods.
 373 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 374   instead.
 375 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 376   is deprecated. Pass only the User argument.
 377 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 378 * Passing a Title as the first parameter to the getTimestampById method of
 379   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 380 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 381   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 382 * The Title parameter to RevisionLookup::getPreviousRevision and
 383   RevisionLookup::getNextRevision is deprecated and should be omitted.
 384 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 385 * The Http class is deprecated. For the request, get, and post methods, use
 386   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 387   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 388   MultiHttpClient directly.
 389 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 390   engine will eventually be made the only engine for HTTP requests.
 391 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 392   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 393   deprecated. Use MediaWikiServices instead.
 394 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 395   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 396 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 397 * The Block class is separated into DatabaseBlock (for blocks stored in the
 398   database), and SystemBlock (for temporary blocks created by the system).
 399   SystemBlock should be used when creating any temporary blocks. Block is
 400   a deprecated alias for DatabaseBlock.
 401 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 402   Some context can be found at T224165.
 403 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 404 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 405   MovePage::moveSubpagesIfAllowed.
 406 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 407 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 408 * Language::viewPrevNext function is deprecated, use
 409   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 410 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 411   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 412 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 413   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 414   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 415 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 416   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 417   instead. Elsewhere, use the methods from the ResourceLoader class.
 418 * The Profiler::setTemplated and Profiler::getTemplated methods have been
 419   deprecated. Use Profiler::setAllowOutput and Profiler::getAllowOutput
 420   instead.
 421 * The Preprocessor_DOM implementation has been deprecated.  It will be
 422   removed in a future release.  Use the Preprocessor_Hash implementation
 423   instead.
 424 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 425   have been deprecated; they will be made private in the future.
 426 * SearchResult::termMatches() method is deprecated. It was unreliable because
 427   only populated by few search engine implementations. Use
 428   SqlSearchResult::getTermMatches() if really needed.
 429 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 430   and should no longer be passed. Search engine implemenations should be
 431   responsible for carrying relevant information needed for highlighting with
 432   their own SearchResultSet/SearchResult sub-classes.
 433 * SearchResultSet::free() method is deprecated.
 434 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 435   SearchDatabase.
 436 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 437   hooks is highly discouraged as it's only populated by SearchDatabase search
 438   engines.
 439 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 440   template option 'searchaction' instead.
 441 * Skin::getRevisionId() and Skin::isRevisionCurrent() have been deprecated.
 442   Use OutputPage::getRevisionId() and OutputPage::isRevisionCurrent() instead.
 443 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 444   been deprecated.
 445 * FileBackend::getWikiId() has been deprecated.
 446   Use FileBackend::getDomainId() instead.
 447 * User::getRights() and User::$mRights have been deprecated. Use
 448   PermissionManager::getUserPermissions() instead.
 449 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 450   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 451 * SVGMetadataExtractor::getMetadata has been deprecated. Instead, you should
 452   use SVGReader->getMetadata() directly.
 453 * The following public properties on AbstractBlock are deprecated: $mReason,
 454   $mTimestamp, $mExpiry, $mHideName. Use the getters/setters instead.
 455 * The following public properties on DatabaseBlock are deprecated: $mAuto,
 456   $mParentBlockId. To check for an autoblock use DatabaseBlock::getType; to
 457   check for the parent ID, use DatabaseBlock::getParentBlockId.
 458 * SearchEngine::userHighlightPrefs() is deprecated, simply stop passing
 459   $contextlines and $contextchars to the SearchHighlighter methods, they will
 460   use proper defaults defined in SearchHighlighter::DEFAULT_CONTEXT_LINES and
 461   DEFAULT_CONTEXT_CHARS.
 462 * SearchUpdate constructor: passing a string as the title param and or a boolean
 463   or a string as the content will produce a deprecation warning.
 464 * SearchEngine::getTextFromContent() is deprecated, use getTextForSearchIndex()
 465   directly from the Content object.
 466 * SearchEngine::textAlreadyUpdatedForIndex() is deprecated, given the
 467   deprecation above this method is no longer needed/called and should not be
 468   implemented by SearchEngine implementation.
 469 * IDatabase::bufferResults() has been deprecated. Use query batching instead.
 470 * MessageCache::singleton() is deprecated. Use
 471   MediaWikiServices::getMessageCache().
 472 * Constructing MovePage directly is deprecated. Use MovePageFactory.
 473 * TempFSFile::factory() has been deprecated. Use TempFSFileFactory instead.
 474 * wfIsBadImage() is deprecated. Use the BadFileLookup service instead.
 475 * Building a new SearchResult is hard-deprecated, always call
 476   SearchResult::newFromTitle(). This class is being refactored into an abstract
 477   class. If you extend this class please be sure to override all its methods
 478   or extend RevisionSearchResult.
 479 * Skin::getSkinNameMessages() is deprecated and no longer used.
 480
 481 === Other changes in 1.34 ===
 482 * …
 483
 484 == Compatibility ==
 485 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 486 supported, it is generally advised to use PHP 7.0.13 or later for long term
 487 support.
 488
 489 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 490 but support for them is somewhat less mature.
 491
 492 The supported versions are:
 493
 494 * MySQL 5.5.8 or later
 495 * PostgreSQL 9.2 or later
 496 * SQLite 3.8.0 or later
 497
 498 == Online documentation ==
 499 Documentation for both end-users and site administrators is available on
 500 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 501 for pages that explicitly state that their contents are in the public domain):
 502
 503        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 504
 505 == Mailing list ==
 506 A mailing list is available for MediaWiki user support and discussion:
 507
 508        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 509
 510 A low-traffic announcements-only list is also available:
 511
 512        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 513
 514 It's highly recommended that you sign up for one of these lists if you're
 515 going to run a public MediaWiki, so you can be notified of security fixes.
 516
 517 == IRC help ==
 518 There's usually someone online in #mediawiki on irc.freenode.net.