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 In an effort to enforce best practices for passwords, MediaWiki will now warn
  30 users, and suggest that they change their password, if it is in the list of
  31 100,000 commonly used passwords that are considered bad passwords. If you want
  32 to disable this for your users, please add the following to your local settings:
  33
  34 $wgPasswordPolicy['policies']['default']['PasswordNotInLargeBlacklist'] = false;
  35
  36 ==== New configuration ====
  37 * $wgAllowExternalReqID (T201409) - This configuration setting controls whether
  38   Mediawiki accepts the request ID set by the incoming request via the
  39   `X-Request-Id` header. If set to `true`, that value will be used throughout
  40   the code as the request identificator. Otherwise, the sent header will be
  41   ignored and the request ID will either be taken from Apache's mod_unique
  42   module or will be generated by Mediawiki itself (depending on the set-up).
  43 * $wgEnableSpecialMute (T218265) - This configuration controls whether
  44   Special:Mute is available and whether to include a link to it on emails
  45   originating from Special:Email.
  46 * editmyuserjsredirect user right – users without this right now cannot edit JS
  47   redirects in their userspace unless the target of the redirect is also in
  48   their userspace. By default, this right is given to everyone.
  49 * (T226733) Add rate limiter to Special:ConfirmEmail.
  50
  51 ==== Changed configuration ====
  52 * $wgUseCdn, $wgCdnServers, $wgCdnServersNoPurge, and $wgCdnMaxAge – These four
  53   CDN-related config variables have been renamed from being specific to Squid –
  54   they were previously $wgUseSquid, $wgSquidServers, $wgSquidServersNoPurge, and
  55   $wgSquidMaxage respectively. This aligns them with the related existing
  56   variable $wgCdnMaxageLagged. The previous configuration variable names are
  57   deprecated, but will be used as the fall back if they are still set.
  58   Note that wgSquidPurgeUseHostHeader has not been renamed, as it is deprecated.
  59 * (T27707) File type checks for image uploads have been relaxed to allow files
  60   containing some HTML markup in metadata. As a result, the $wgAllowTitlesInSVG
  61   setting is no longer applied and is now always true. Note that MSIE 7 may
  62   still be able to misinterpret certain malformed PNG files as HTML.
  63 * Introduced $wgVerifyMimeTypeIE to allow disabling the MSIE 6/7 file type
  64   detection heuristic on upload, which is more conservative than the checks
  65   that were changed above.
  66 * $wgSkipSkin — Setting this instead of $wgSkipSkins, deprecated in 1.23, is now
  67   hard-deprecated.
  68 * $wgLocalInterwiki — Setting this instead of $wgLocalInterwikis, deprecated in
  69   1.23, is now hard-deprecated.
  70 * $wgProfileOnly — Setting this, deprecated in 1.23, is now hard-deprecated.
  71   Instead, set the log file in $wgDebugLogGroups['profileoutput'].
  72 * $wgProxyList — Setting this to an array with IP addresses in the array keys,
  73   which was deprecated in 1.30, no longer works. Instead, $wgProxyList should be
  74   an array with IP addresses as the values, or a string path to a file
  75   containing one IP address per line.
  76 * $wgCookieSetOnAutoblock and $wgCookieSetOnIpBlock are now enabled by default.
  77 * …
  78
  79 ==== Removed configuration ====
  80 * $wgWikiDiff2MovedParagraphDetectionCutoff — If you still want a custom change
  81   size threshold, please specify in php.ini, using the configuration variable
  82   wikidiff2.moved_paragraph_detection_cutoff.
  83 * $wgDebugPrintHttpHeaders - The default of including HTTP headers in the
  84   debug log channel is no longer configurable. The debug log itself remains
  85   configurable via $wgDebugLogFile.
  86 * $wgMsgCacheExpiry - The MessageCache uses 24 hours as the expiry for values
  87   stored in WANObjectCache. This is no longer configurable.
  88 * $wgPasswordSalt – This setting, used for migrating exceptionally old, insecure
  89   password setups and deprecated since 1.24, is now removed.
  90 * $wgDBOracleDRCP - If you must use persistent connections, set DBO_PERSISTENT
  91   in the 'flags' field for servers in $wgDBServers (or $wgLBFactoryConf).
  92 * $wgMemCachedDebug - Set the cache "debug" field in $wgObjectCaches instead.
  93
  94 === New user-facing features in 1.34 ===
  95 * Special:Mute has been added as a quick way for users to block unwanted emails
  96   from other users originating from Special:EmailUser.
  97 * (T207577) Special:NewSection has been created as a shortcut to creating a new
  98   section on a page. When linked to, its subpage is used as the target
  99   ([[Special:NewSection/Test]] redirects to creating a new section in "Test").
 100   Otherwise, it displays a basic interface to allow the end user to specify
 101   the target manually.
 102 * (T220447) Special:Contributions/newbies has been removed for performance and
 103   usefulness reasons. Use Special:RecentChanges?userExpLevel=newcomer instead.
 104 * Special:NewFiles/newbies has been removed for performance and usefulness
 105   reasons. Use Special:RecentChanges?userExpLevel=newcomer&namespace=6 instead.
 106
 107 === New developer features in 1.34 ===
 108 * The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification
 109   of headers in private wikis.
 110 * Language::formatTimePeriod now supports the new 'avoidhours' option to output
 111   strings like "5 days ago" instead of "5 days 13 hours ago".
 112 * (T220163) Added SpecialMuteModifyFormFields hook to allow extensions
 113   to add fields to Special:Mute.
 114 * (T100896) Skin authors can define custom OOUI themes using OOUIThemePaths.
 115   See <https://www.mediawiki.org/wiki/OOUI/Themes> for details.
 116 * (T229035) The GetUserBlock hook was added. Use this instead of
 117   GetBlockedStatus.
 118 * ObjectFactory is available as a service. When used as a service, the object
 119   specs can now specify needed DI services.
 120
 121 === External library changes in 1.34 ===
 122
 123 ==== New external libraries ====
 124 * …
 125
 126 ==== Changed external libraries ====
 127 * Updated Mustache from 1.0.0 to v3.0.1.
 128 * Updated OOUI from v0.31.3 to v0.34.0.
 129 * Updated OOjs from v2.2.2 to v3.0.0.
 130 * Updated composer/semver from 1.4.2 to 1.5.0.
 131 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
 132 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
 133 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
 134 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
 135 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
 136 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
 137 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
 138 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
 139 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
 140 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
 141 * …
 142
 143 ==== Removed external libraries ====
 144 * The jquery.async module, deprecated in 1.33, was removed.
 145 * …
 146
 147 === Bug fixes in 1.34 ===
 148 * (T222529) If a log entry or page revision is recorded in the database with an
 149   empty username, attempting to display it will log an error and return a "no
 150   username available" to the user instead of silently displaying nothing or
 151   invalid links.
 152
 153 === Action API changes in 1.34 ===
 154 * The 'recenteditcount' response property from action=query list=allusers,
 155   deprecated in 1.25, has been removed.
 156 * (T60993) action=query list=filearchive no longer requires the 'deletedhistory'
 157   user right.
 158
 159 === Action API internal changes in 1.34 ===
 160 * …
 161
 162 === Languages updated in 1.34 ===
 163 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 164 Below only new and removed languages are listed, as well as changes to languages
 165 because of Phabricator reports.
 166
 167 * (T152908) Added language support for N'Ko (nqo).
 168
 169 === Breaking changes in 1.34 ===
 170 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 171   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 172   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 173 * Preferences class, deprecated in 1.31, has been removed.
 174 * The following parts of code, deprecated in 1.32, were removed in favor of
 175   built-in PHP functions:
 176   * CryptRand class
 177   * CryptRand service
 178   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 179 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 180   create a new Language object with a different language code.
 181 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 182   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 183   Instead, reset services, such as by calling $this->overrideMwServices() (if
 184   your test extends MediaWikiTestCase). Services will generally not pick up
 185   configuration changes from after they were created, so you must reset
 186   services after any configuration change. Even if your code works now, it is
 187   likely to break in future versions as more code is moved to services.
 188 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 189 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 190   been removed.
 191 * ObjectFactory class, deprecated in 1.31, has been removed.
 192 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 193 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 194 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 195   This behavior was removed, and the method now matches the parent signature
 196   (SpecialPage::execute) which is to return HTML string or void.
 197   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 198 * The 'recenteditcount' response property from action API action=query
 199   list=allusers, deprecated in 1.25, has been removed.
 200 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 201   SearchEngine::create(), SearchEngine::getSearchTypes() and
 202   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 203 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 204 * User::randomPassword() method, deprecated in 1.27, have been removed.
 205 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 206 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 207 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 208   removed.
 209 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 210 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 211   User objects to taking UserIdentity objects. Extensions implementing this
 212   interface need to be changed accordingly.
 213 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 214   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 215 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 216   UserGroupMembership::getLink() instead.
 217 * SavepointPostgres, deprecated in 1.31, has been removed.
 218 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 219   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 220   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 221   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 222 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 223   have been removed.
 224 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 225   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 226   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 227   ::showFileNotFoundError().
 228 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 229 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 230   INTL_ICU_VERSION constant directly.
 231 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 232 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 233   both deprecated in 1.32, have been removed.
 234 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 235   been removed. Use ->msg() or ->getMsg() instead.
 236 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 237   use WatchAction::getWatchToken() with action 'unwatch' directly.
 238 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 239   1.28, have been removed.
 240 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 241   deprecated in 1.32, have been removed.
 242 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 243   in 1.33, have been removed.
 244 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 245 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 246   removed.
 247 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 248 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 249 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 250 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 251 * The Block typehint only refers to blocks stored in the database. It should be
 252   updated to AbstractBlock in cases where any type of block could be expected.
 253 * FileRepoStatus, deprecated in 1.25, has been removed.
 254 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 255   in 1.27, has been removed.
 256 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 257 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 258   was deprecated in 1.25.
 259 * The jquery.byteLength module, deprecated in 1.31, was removed.
 260   Use the mediawiki.String module instead.
 261 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 262   Use require( 'mediawiki.language.specialCharacters' ) instead.
 263 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 264   directly.
 265 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 266   getErrorsOrWarnings() instead.
 267 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 268   SpecialPage::getPageTitle() instead.
 269 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 270   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 271   which are no longer used, have now been removed.
 272 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 273   specified, deprecated in 1.30, have been removed.
 274 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 275 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 276 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 277   removed. Use NS_FILE and NS_FILE_TALK respectively.
 278 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 279   (deprecated in 1.32) have been removed. Closures should be used instead.
 280 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 281   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 282   removed.
 283 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 284   method, deprecated in 1.32, have been removed.
 285 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 286 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 287   Parser::fetchFileAndTitle() instead.
 288 * The global function wfBCP47, deprecated in 1.31, has been removed.
 289 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 290   \Maintenance::countDown() method instead.
 291 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 292   deprecated since 1.20.
 293 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 294 * Linker::link() no longer accepts a string for the query array, as was
 295   deprecated in 1.20.
 296 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 297   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 298 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 299   UserGroupsChanged hook.
 300 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 301   instance from MediaWikiServices instead.
 302 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 303 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 304   Use MediaWiki\Session\SessionManager instead.
 305 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 306   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 307 * The internal method OutputPage->addScriptFile() will no longer silently drop
 308   calls that use an invalid path (i.e., something other than an absolute path,
 309   protocol-relative URL, or full scheme URL), and will instead pass them to the
 310   client where they will likely 404. This usage was deprecated in 1.24.
 311 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 312 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 313   EditFilterMergedContent hook for an alternative way to use this feature.
 314 * API module methods getDescription(), getParamDescription(), & getExamples(),
 315   all deprecated in 1.25 and ignored, have been removed.
 316 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 317   removed.
 318 * The JavaScript global variable wgLoadScript has been removed. Use
 319   mw.util.wikiScript( 'load' ) instead.
 320 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 321   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 322   in JavaScript, use mw.log.deprecate() instead.
 323 * The 'user.groups' module, deprecated in 1.28, was removed.
 324   Use the 'user' module instead.
 325 * The ResourceLoaderContext::expandModuleNames method, deprecated in 1.33, was
 326   removed. Use ResourceLoader::expandModuleNames instead.
 327 * The ability to override User::$mRights has been removed. Use
 328   PermissionManager::addTemporaryUserRights() instead.
 329 * Previously, when iterating ResultWrapper with foreach() or a similar
 330   construct, the range of the index was 1..numRows. This has been fixed to be
 331   0..(numRows-1).
 332 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 333   AuthChangeFormFields hook or security levels instead.
 334 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 335   Use WikiMap::getWikiIdFromDbDomain() instead.
 336 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 337   which were deprecated and ignored by core since 1.22, are no longer set to any
 338   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 339   updated since 2013 to cope with this deprecation may now break.
 340 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 341   or $wgResourceModules is no longer supported.
 342   Use the 'class' or 'factory' option of the array format instead.
 343 * The parameter $lang of the functions generateTOC and tocList in Linker and
 344   DummyLinker must be in type Language when present. Other types are
 345   deprecated since 1.33.
 346 * The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29,
 347   have been removed.
 348 * ParserOption::getSpeculativeRevIdCallback(), deprecated in 1.28, has been
 349   removed.
 350 * The UploadVerification hook, deprecated in 1.28, has been removed. Instead,
 351   use the UploadVerifyFile hook.
 352 * UploadBase:: and UploadFromChunks::stashFileGetKey() and stashSession(),
 353   deprecated in 1.28, have been removed. Instead, please use the getFileKey()
 354   method on the response from doStashFile().
 355 * LBFactory::setDomainPrefix() and LoadBalancer::setDomainPrefix(), deprecated
 356   in 1.33, have been removed. Use setLocalDomainPrefix() instead.
 357 * IDatabase::implicitGroupby(), deprecated in 1.30, has been removed.
 358 * IDatabase::doneWrites(), deprecated in 1.31, has been removed.
 359   Use IDatabase::lastDoneWrites() instead.
 360 * Database::reportConnectionError(), deprecated in 1.32, has been removed.
 361 * LoadBalancer::laggedSlaveUsed(), deprecated in 1.28, has been removed.
 362   Use LoadBalancer::laggedReplicaUsed() instead.
 363 * Database::getProperty(), deprecated in 1.28, has been removed.
 364 * IDatabase::getWikiId(), deprecated in 1.30, has been removed.
 365   Use IDatabase::getDomainID() instead.
 366 * (T191231) Support for using Oracle or MSSQL as database backends has been
 367   dropped.
 368 * MessageCache::destroyInstance() has been removed. Instead, call
 369   MediaWikiTestCase::resetServices().
 370 * SearchResult protected field $searchEngine is removed and no longer
 371   initialized after calling SearchResult::initFromTitle().
 372 * The UserIsBlockedFrom hook is only called if a block is found first, and
 373   should only be used to unblock a blocked user.
 374 * Parameters for index.php from PATH_INFO, such as the title, are no longer
 375   written to $_GET.
 376 * …
 377
 378 === Deprecations in 1.34 ===
 379 * The MWNamespace class is deprecated. Use NamespaceInfo.
 380 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 381   Instead, use ->queue().
 382 * User::isBlocked() is deprecated since it does not tell you if the user is
 383   blocked from editing a particular page. Use User::getBlock() or
 384   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 385 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 386   to the BlockManager as private helper methods.
 387 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 388   instead.
 389 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 390   is deprecated. Pass only the User argument.
 391 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 392 * Passing a Title as the first parameter to the getTimestampById method of
 393   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 394 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 395   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 396 * The Title parameter to RevisionLookup::getPreviousRevision and
 397   RevisionLookup::getNextRevision is deprecated and should be omitted.
 398 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 399 * The Http class is deprecated. For the request, get, and post methods, use
 400   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 401   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 402   MultiHttpClient directly.
 403 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 404   engine will eventually be made the only engine for HTTP requests.
 405 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 406   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 407   deprecated. Use MediaWikiServices instead.
 408 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 409   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 410 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 411 * The Block class is separated into DatabaseBlock (for blocks stored in the
 412   database), and SystemBlock (for temporary blocks created by the system).
 413   SystemBlock should be used when creating any temporary blocks. Block is
 414   a deprecated alias for DatabaseBlock.
 415 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 416   Some context can be found at T224165.
 417 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 418 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 419   MovePage::moveSubpagesIfAllowed.
 420 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 421 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 422 * Language::viewPrevNext function is deprecated, use
 423   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 424 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 425   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 426 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 427   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 428   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 429 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 430   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 431   instead. Elsewhere, use the methods from the ResourceLoader class.
 432 * The 'jquery.accessKeyLabel' module has been deprecated. This jQuery
 433   plugin is now ships as part of the 'mediawiki.util' module bundle.
 434 * The Profiler::setTemplated and Profiler::getTemplated methods have been
 435   deprecated. Use Profiler::setAllowOutput and Profiler::getAllowOutput
 436   instead.
 437 * The Preprocessor_DOM implementation has been deprecated.  It will be
 438   removed in a future release.  Use the Preprocessor_Hash implementation
 439   instead.
 440 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 441   have been deprecated; they will be made private in the future.
 442 * SearchResult::termMatches() method is deprecated. It was unreliable because
 443   only populated by few search engine implementations. Use
 444   SqlSearchResult::getTermMatches() if really needed.
 445 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 446   and should no longer be passed. Search engine implemenations should be
 447   responsible for carrying relevant information needed for highlighting with
 448   their own SearchResultSet/SearchResult sub-classes.
 449 * SearchResultSet::free() method is deprecated.
 450 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 451   SearchDatabase.
 452 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 453   hooks is highly discouraged as it's only populated by SearchDatabase search
 454   engines.
 455 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 456   template option 'searchaction' instead.
 457 * Skin::getRevisionId() and Skin::isRevisionCurrent() have been deprecated.
 458   Use OutputPage::getRevisionId() and OutputPage::isRevisionCurrent() instead.
 459 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 460   been deprecated.
 461 * FileBackend::getWikiId() has been deprecated.
 462   Use FileBackend::getDomainId() instead.
 463 * User::getRights() and User::$mRights have been deprecated. Use
 464   PermissionManager::getUserPermissions() instead.
 465 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 466   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 467 * SVGMetadataExtractor::getMetadata has been deprecated. Instead, you should
 468   use SVGReader->getMetadata() directly.
 469 * The following public properties on AbstractBlock are deprecated: $mReason,
 470   $mTimestamp, $mExpiry, $mHideName. Use the getters/setters instead.
 471 * The following public properties on DatabaseBlock are deprecated: $mAuto,
 472   $mParentBlockId. To check for an autoblock use DatabaseBlock::getType; to
 473   check for the parent ID, use DatabaseBlock::getParentBlockId.
 474 * SearchEngine::userHighlightPrefs() is deprecated, simply stop passing
 475   $contextlines and $contextchars to the SearchHighlighter methods, they will
 476   use proper defaults defined in SearchHighlighter::DEFAULT_CONTEXT_LINES and
 477   DEFAULT_CONTEXT_CHARS.
 478 * SearchUpdate constructor: passing a string as the title param and or a boolean
 479   or a string as the content will produce a deprecation warning.
 480 * SearchEngine::getTextFromContent() is deprecated, use getTextForSearchIndex()
 481   directly from the Content object.
 482 * SearchEngine::textAlreadyUpdatedForIndex() is deprecated, given the
 483   deprecation above this method is no longer needed/called and should not be
 484   implemented by SearchEngine implementation.
 485 * IDatabase::bufferResults() has been deprecated. Use query batching instead.
 486 * MessageCache::singleton() is deprecated. Use
 487   MediaWikiServices::getMessageCache().
 488 * Constructing MovePage directly is deprecated. Use MovePageFactory.
 489 * TempFSFile::factory() has been deprecated. Use TempFSFileFactory instead.
 490 * wfIsBadImage() is deprecated. Use the BadFileLookup service instead.
 491 * Building a new SearchResult is hard-deprecated, always call
 492   SearchResult::newFromTitle(). This class is being refactored into an abstract
 493   class. If you extend this class please be sure to override all its methods
 494   or extend RevisionSearchResult.
 495 * Skin::getSkinNameMessages() is deprecated and no longer used.
 496
 497 === Other changes in 1.34 ===
 498 * …
 499
 500 == Compatibility ==
 501 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 502 supported, it is generally advised to use PHP 7.0.13 or later for long term
 503 support. It also requires the following PHP extensions:
 504
 505 * ctype
 506 * dom
 507 * fileinfo
 508 * iconv
 509 * json
 510 * mbstring
 511 * xml
 512
 513 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 514 but support for them is somewhat less mature.
 515
 516 The supported versions are:
 517
 518 * MySQL 5.5.8 or later
 519 * PostgreSQL 9.2 or later
 520 * SQLite 3.8.0 or later
 521
 522 == Online documentation ==
 523 Documentation for both end-users and site administrators is available on
 524 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 525 for pages that explicitly state that their contents are in the public domain):
 526
 527        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 528
 529 == Mailing list ==
 530 A mailing list is available for MediaWiki user support and discussion:
 531
 532        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 533
 534 A low-traffic announcements-only list is also available:
 535
 536        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 537
 538 It's highly recommended that you sign up for one of these lists if you're
 539 going to run a public MediaWiki, so you can be notified of security fixes.
 540
 541 == IRC help ==
 542 There's usually someone online in #mediawiki on irc.freenode.net.