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 * $wgMemCachedDebug - Set the cache "debug" field in $wgObjectCaches instead.
  85
  86 === New user-facing features in 1.34 ===
  87 * Special:Mute has been added as a quick way for users to block unwanted emails
  88   from other users originating from Special:EmailUser.
  89 * (T207577) Special:NewSection has been created as a shortcut to creating a new
  90   section on a page. When linked to, its subpage is used as the target
  91   ([[Special:NewSection/Test]] redirects to creating a new section in "Test").
  92   Otherwise, it displays a basic interface to allow the end user to specify
  93   the target manually.
  94 * (T220447) Special:Contributions/newbies has been removed for performance and
  95   usefulness reasons. Use Special:RecentChanges?userExpLevel=newcomer instead.
  96 * Special:NewFiles/newbies has been removed for performance and usefulness
  97   reasons. Use Special:RecentChanges?userExpLevel=newcomer&namespace=6 instead.
  98
  99 === New developer features in 1.34 ===
 100 * The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification
 101   of headers in private wikis.
 102 * Language::formatTimePeriod now supports the new 'avoidhours' option to output
 103   strings like "5 days ago" instead of "5 days 13 hours ago".
 104 * (T220163) Added SpecialMuteModifyFormFields hook to allow extensions
 105   to add fields to Special:Mute.
 106 * (T100896) Skin authors can define custom OOUI themes using OOUIThemePaths.
 107   See <https://www.mediawiki.org/wiki/OOUI/Themes> for details.
 108 * (T229035) The GetUserBlock hook was added. Use this instead of
 109   GetBlockedStatus.
 110 * ObjectFactory is available as a service. When used as a service, the object
 111   specs can now specify needed DI services.
 112
 113 === External library changes in 1.34 ===
 114
 115 ==== New external libraries ====
 116 * …
 117
 118 ==== Changed external libraries ====
 119 * Updated Mustache from 1.0.0 to v3.0.1.
 120 * Updated OOUI from v0.31.3 to v0.34.0.
 121 * Updated OOjs from v2.2.2 to v3.0.0.
 122 * Updated composer/semver from 1.4.2 to 1.5.0.
 123 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
 124 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
 125 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
 126 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
 127 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
 128 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
 129 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
 130 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
 131 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
 132 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
 133 * …
 134
 135 ==== Removed external libraries ====
 136 * The jquery.async module, deprecated in 1.33, was removed.
 137 * …
 138
 139 === Bug fixes in 1.34 ===
 140 * (T222529) If a log entry or page revision is recorded in the database with an
 141   empty username, attempting to display it will log an error and return a "no
 142   username available" to the user instead of silently displaying nothing or
 143   invalid links.
 144
 145 === Action API changes in 1.34 ===
 146 * The 'recenteditcount' response property from action=query list=allusers,
 147   deprecated in 1.25, has been removed.
 148
 149 === Action API internal changes in 1.34 ===
 150 * …
 151
 152 === Languages updated in 1.34 ===
 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 * (T152908) Added language support for N'Ko (nqo).
 158
 159 === Breaking changes in 1.34 ===
 160 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 161   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 162   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 163 * Preferences class, deprecated in 1.31, has been removed.
 164 * The following parts of code, deprecated in 1.32, were removed in favor of
 165   built-in PHP functions:
 166   * CryptRand class
 167   * CryptRand service
 168   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 169 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 170   create a new Language object with a different language code.
 171 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 172   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 173   Instead, reset services, such as by calling $this->overrideMwServices() (if
 174   your test extends MediaWikiTestCase). Services will generally not pick up
 175   configuration changes from after they were created, so you must reset
 176   services after any configuration change. Even if your code works now, it is
 177   likely to break in future versions as more code is moved to services.
 178 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 179 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 180   been removed.
 181 * ObjectFactory class, deprecated in 1.31, has been removed.
 182 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 183 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 184 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 185   This behavior was removed, and the method now matches the parent signature
 186   (SpecialPage::execute) which is to return HTML string or void.
 187   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 188 * The 'recenteditcount' response property from action API action=query
 189   list=allusers, deprecated in 1.25, has been removed.
 190 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 191   SearchEngine::create(), SearchEngine::getSearchTypes() and
 192   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 193 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 194 * User::randomPassword() method, deprecated in 1.27, have been removed.
 195 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 196 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 197 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 198   removed.
 199 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 200 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 201   User objects to taking UserIdentity objects. Extensions implementing this
 202   interface need to be changed accordingly.
 203 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 204   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 205 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 206   UserGroupMembership::getLink() instead.
 207 * SavepointPostgres, deprecated in 1.31, has been removed.
 208 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 209   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 210   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 211   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 212 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 213   have been removed.
 214 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 215   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 216   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 217   ::showFileNotFoundError().
 218 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 219 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 220   INTL_ICU_VERSION constant directly.
 221 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 222 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 223   both deprecated in 1.32, have been removed.
 224 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 225   been removed. Use ->msg() or ->getMsg() instead.
 226 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 227   use WatchAction::getWatchToken() with action 'unwatch' directly.
 228 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 229   1.28, have been removed.
 230 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 231   deprecated in 1.32, have been removed.
 232 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 233   in 1.33, have been removed.
 234 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 235 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 236   removed.
 237 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 238 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 239 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 240 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 241 * The Block typehint only refers to blocks stored in the database. It should be
 242   updated to AbstractBlock in cases where any type of block could be expected.
 243 * FileRepoStatus, deprecated in 1.25, has been removed.
 244 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 245   in 1.27, has been removed.
 246 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 247 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 248   was deprecated in 1.25.
 249 * The jquery.byteLength module, deprecated in 1.31, was removed.
 250   Use the mediawiki.String module instead.
 251 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 252   Use require( 'mediawiki.language.specialCharacters' ) instead.
 253 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 254   directly.
 255 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 256   getErrorsOrWarnings() instead.
 257 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 258   SpecialPage::getPageTitle() instead.
 259 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 260   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 261   which are no longer used, have now been removed.
 262 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 263   specified, deprecated in 1.30, have been removed.
 264 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 265 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 266 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 267   removed. Use NS_FILE and NS_FILE_TALK respectively.
 268 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 269   (deprecated in 1.32) have been removed. Closures should be used instead.
 270 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 271   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 272   removed.
 273 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 274   method, deprecated in 1.32, have been removed.
 275 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 276 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 277   Parser::fetchFileAndTitle() instead.
 278 * The global function wfBCP47, deprecated in 1.31, has been removed.
 279 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 280   \Maintenance::countDown() method instead.
 281 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 282   deprecated since 1.20.
 283 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 284 * Linker::link() no longer accepts a string for the query array, as was
 285   deprecated in 1.20.
 286 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 287   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 288 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 289   UserGroupsChanged hook.
 290 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 291   instance from MediaWikiServices instead.
 292 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 293 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 294   Use MediaWiki\Session\SessionManager instead.
 295 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 296   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 297 * The internal method OutputPage->addScriptFile() will no longer silently drop
 298   calls that use an invalid path (i.e., something other than an absolute path,
 299   protocol-relative URL, or full scheme URL), and will instead pass them to the
 300   client where they will likely 404. This usage was deprecated in 1.24.
 301 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 302 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 303   EditFilterMergedContent hook for an alternative way to use this feature.
 304 * API module methods getDescription(), getParamDescription(), & getExamples(),
 305   all deprecated in 1.25 and ignored, have been removed.
 306 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 307   removed.
 308 * The JavaScript global variable wgLoadScript has been removed. Use
 309   mw.util.wikiScript( 'load' ) instead.
 310 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 311   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 312   in JavaScript, use mw.log.deprecate() instead.
 313 * The 'user.groups' module, deprecated in 1.28, was removed.
 314   Use the 'user' module instead.
 315 * The ResourceLoaderContext::expandModuleNames method, deprecated in 1.33, was
 316   removed. Use ResourceLoader::expandModuleNames instead.
 317 * The ability to override User::$mRights has been removed. Use
 318   PermissionManager::addTemporaryUserRights() instead.
 319 * Previously, when iterating ResultWrapper with foreach() or a similar
 320   construct, the range of the index was 1..numRows. This has been fixed to be
 321   0..(numRows-1).
 322 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 323   AuthChangeFormFields hook or security levels instead.
 324 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 325   Use WikiMap::getWikiIdFromDbDomain() instead.
 326 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 327   which were deprecated and ignored by core since 1.22, are no longer set to any
 328   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 329   updated since 2013 to cope with this deprecation may now break.
 330 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 331   or $wgResourceModules is no longer supported.
 332   Use the 'class' or 'factory' option of the array format instead.
 333 * The parameter $lang of the functions generateTOC and tocList in Linker and
 334   DummyLinker must be in type Language when present. Other types are
 335   deprecated since 1.33.
 336 * The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29,
 337   have been removed.
 338 * ParserOption::getSpeculativeRevIdCallback(), deprecated in 1.28, has been
 339   removed.
 340 * The UploadVerification hook, deprecated in 1.28, has been removed. Instead,
 341   use the UploadVerifyFile hook.
 342 * UploadBase:: and UploadFromChunks::stashFileGetKey() and stashSession(),
 343   deprecated in 1.28, have been removed. Instead, please use the getFileKey()
 344   method on the response from doStashFile().
 345 * LBFactory::setDomainPrefix() and LoadBalancer::setDomainPrefix(), deprecated
 346   in 1.33, have been removed. Use setLocalDomainPrefix() instead.
 347 * IDatabase::implicitGroupby(), deprecated in 1.30, has been removed.
 348 * IDatabase::doneWrites(), deprecated in 1.31, has been removed.
 349   Use IDatabase::lastDoneWrites() instead.
 350 * Database::reportConnectionError(), deprecated in 1.32, has been removed.
 351 * LoadBalancer::laggedSlaveUsed(), deprecated in 1.28, has been removed.
 352   Use LoadBalancer::laggedReplicaUsed() instead.
 353 * Database::getProperty(), deprecated in 1.28, has been removed.
 354 * IDatabase::getWikiId(), deprecated in 1.30, has been removed.
 355   Use IDatabase::getDomainID() instead.
 356 * (T191231) Support for using Oracle or MSSQL as database backends has been
 357   dropped.
 358 * MessageCache::destroyInstance() has been removed. Instead, call
 359   MediaWikiTestCase::resetServices().
 360 * SearchResult protected field $searchEngine is removed and no longer
 361   initialized after calling SearchResult::initFromTitle().
 362 * The UserIsBlockedFrom hook is only called if a block is found first, and
 363   should only be used to unblock a blocked user.
 364 * …
 365
 366 === Deprecations in 1.34 ===
 367 * The MWNamespace class is deprecated. Use NamespaceInfo.
 368 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 369   Instead, use ->queue().
 370 * User::isBlocked() is deprecated since it does not tell you if the user is
 371   blocked from editing a particular page. Use User::getBlock() or
 372   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 373 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 374   to the BlockManager as private helper methods.
 375 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 376   instead.
 377 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 378   is deprecated. Pass only the User argument.
 379 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 380 * Passing a Title as the first parameter to the getTimestampById method of
 381   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 382 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 383   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 384 * The Title parameter to RevisionLookup::getPreviousRevision and
 385   RevisionLookup::getNextRevision is deprecated and should be omitted.
 386 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 387 * The Http class is deprecated. For the request, get, and post methods, use
 388   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 389   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 390   MultiHttpClient directly.
 391 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 392   engine will eventually be made the only engine for HTTP requests.
 393 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 394   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 395   deprecated. Use MediaWikiServices instead.
 396 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 397   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 398 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 399 * The Block class is separated into DatabaseBlock (for blocks stored in the
 400   database), and SystemBlock (for temporary blocks created by the system).
 401   SystemBlock should be used when creating any temporary blocks. Block is
 402   a deprecated alias for DatabaseBlock.
 403 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 404   Some context can be found at T224165.
 405 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 406 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 407   MovePage::moveSubpagesIfAllowed.
 408 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 409 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 410 * Language::viewPrevNext function is deprecated, use
 411   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 412 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 413   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 414 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 415   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 416   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 417 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 418   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 419   instead. Elsewhere, use the methods from the ResourceLoader class.
 420 * The Profiler::setTemplated and Profiler::getTemplated methods have been
 421   deprecated. Use Profiler::setAllowOutput and Profiler::getAllowOutput
 422   instead.
 423 * The Preprocessor_DOM implementation has been deprecated.  It will be
 424   removed in a future release.  Use the Preprocessor_Hash implementation
 425   instead.
 426 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 427   have been deprecated; they will be made private in the future.
 428 * SearchResult::termMatches() method is deprecated. It was unreliable because
 429   only populated by few search engine implementations. Use
 430   SqlSearchResult::getTermMatches() if really needed.
 431 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 432   and should no longer be passed. Search engine implemenations should be
 433   responsible for carrying relevant information needed for highlighting with
 434   their own SearchResultSet/SearchResult sub-classes.
 435 * SearchResultSet::free() method is deprecated.
 436 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 437   SearchDatabase.
 438 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 439   hooks is highly discouraged as it's only populated by SearchDatabase search
 440   engines.
 441 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 442   template option 'searchaction' instead.
 443 * Skin::getRevisionId() and Skin::isRevisionCurrent() have been deprecated.
 444   Use OutputPage::getRevisionId() and OutputPage::isRevisionCurrent() instead.
 445 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 446   been deprecated.
 447 * FileBackend::getWikiId() has been deprecated.
 448   Use FileBackend::getDomainId() instead.
 449 * User::getRights() and User::$mRights have been deprecated. Use
 450   PermissionManager::getUserPermissions() instead.
 451 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 452   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 453 * SVGMetadataExtractor::getMetadata has been deprecated. Instead, you should
 454   use SVGReader->getMetadata() directly.
 455 * The following public properties on AbstractBlock are deprecated: $mReason,
 456   $mTimestamp, $mExpiry, $mHideName. Use the getters/setters instead.
 457 * The following public properties on DatabaseBlock are deprecated: $mAuto,
 458   $mParentBlockId. To check for an autoblock use DatabaseBlock::getType; to
 459   check for the parent ID, use DatabaseBlock::getParentBlockId.
 460 * SearchEngine::userHighlightPrefs() is deprecated, simply stop passing
 461   $contextlines and $contextchars to the SearchHighlighter methods, they will
 462   use proper defaults defined in SearchHighlighter::DEFAULT_CONTEXT_LINES and
 463   DEFAULT_CONTEXT_CHARS.
 464 * SearchUpdate constructor: passing a string as the title param and or a boolean
 465   or a string as the content will produce a deprecation warning.
 466 * SearchEngine::getTextFromContent() is deprecated, use getTextForSearchIndex()
 467   directly from the Content object.
 468 * SearchEngine::textAlreadyUpdatedForIndex() is deprecated, given the
 469   deprecation above this method is no longer needed/called and should not be
 470   implemented by SearchEngine implementation.
 471 * IDatabase::bufferResults() has been deprecated. Use query batching instead.
 472 * MessageCache::singleton() is deprecated. Use
 473   MediaWikiServices::getMessageCache().
 474 * Constructing MovePage directly is deprecated. Use MovePageFactory.
 475 * TempFSFile::factory() has been deprecated. Use TempFSFileFactory instead.
 476 * wfIsBadImage() is deprecated. Use the BadFileLookup service instead.
 477 * Building a new SearchResult is hard-deprecated, always call
 478   SearchResult::newFromTitle(). This class is being refactored into an abstract
 479   class. If you extend this class please be sure to override all its methods
 480   or extend RevisionSearchResult.
 481 * Skin::getSkinNameMessages() is deprecated and no longer used.
 482
 483 === Other changes in 1.34 ===
 484 * …
 485
 486 == Compatibility ==
 487 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 488 supported, it is generally advised to use PHP 7.0.13 or later for long term
 489 support. It also requires the following PHP extensions:
 490
 491 * ctype
 492 * dom
 493 * fileinfo
 494 * iconv
 495 * json
 496 * mbstring
 497 * xml
 498
 499 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 500 but support for them is somewhat less mature.
 501
 502 The supported versions are:
 503
 504 * MySQL 5.5.8 or later
 505 * PostgreSQL 9.2 or later
 506 * SQLite 3.8.0 or later
 507
 508 == Online documentation ==
 509 Documentation for both end-users and site administrators is available on
 510 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 511 for pages that explicitly state that their contents are in the public domain):
 512
 513        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 514
 515 == Mailing list ==
 516 A mailing list is available for MediaWiki user support and discussion:
 517
 518        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 519
 520 A low-traffic announcements-only list is also available:
 521
 522        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 523
 524 It's highly recommended that you sign up for one of these lists if you're
 525 going to run a public MediaWiki, so you can be notified of security fixes.
 526
 527 == IRC help ==
 528 There's usually someone online in #mediawiki on irc.freenode.net.