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 * (T222388) Special pages can now be specified as an ObjectFactory spec,
 121   allowing the construction of special pages that require services to be
 122   injected in their constructor.
 123
 124 === External library changes in 1.34 ===
 125
 126 ==== New external libraries ====
 127 * …
 128
 129 ==== Changed external libraries ====
 130 * Updated Mustache from 1.0.0 to v3.0.1.
 131 * Updated OOUI from v0.31.3 to v0.34.0.
 132 * Updated OOjs from v2.2.2 to v3.0.0.
 133 * Updated composer/semver from 1.4.2 to 1.5.0.
 134 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
 135 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
 136 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
 137 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
 138 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
 139 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
 140 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
 141 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
 142 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
 143 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
 144 * …
 145
 146 ==== Removed external libraries ====
 147 * The jquery.async module, deprecated in 1.33, was removed.
 148 * …
 149
 150 === Bug fixes in 1.34 ===
 151 * (T222529) If a log entry or page revision is recorded in the database with an
 152   empty username, attempting to display it will log an error and return a "no
 153   username available" to the user instead of silently displaying nothing or
 154   invalid links.
 155
 156 === Action API changes in 1.34 ===
 157 * The 'recenteditcount' response property from action=query list=allusers,
 158   deprecated in 1.25, has been removed.
 159
 160 === Action API internal changes in 1.34 ===
 161 * …
 162
 163 === Languages updated in 1.34 ===
 164 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 165 Below only new and removed languages are listed, as well as changes to languages
 166 because of Phabricator reports.
 167
 168 * (T152908) Added language support for N'Ko (nqo).
 169
 170 === Breaking changes in 1.34 ===
 171 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 172   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 173   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 174 * Preferences class, deprecated in 1.31, has been removed.
 175 * The following parts of code, deprecated in 1.32, were removed in favor of
 176   built-in PHP functions:
 177   * CryptRand class
 178   * CryptRand service
 179   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 180 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 181   create a new Language object with a different language code.
 182 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 183   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 184   Instead, reset services, such as by calling $this->overrideMwServices() (if
 185   your test extends MediaWikiTestCase). Services will generally not pick up
 186   configuration changes from after they were created, so you must reset
 187   services after any configuration change. Even if your code works now, it is
 188   likely to break in future versions as more code is moved to services.
 189 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 190 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 191   been removed.
 192 * ObjectFactory class, deprecated in 1.31, has been removed.
 193 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 194 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 195 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 196   This behavior was removed, and the method now matches the parent signature
 197   (SpecialPage::execute) which is to return HTML string or void.
 198   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 199 * The 'recenteditcount' response property from action API action=query
 200   list=allusers, deprecated in 1.25, has been removed.
 201 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 202   SearchEngine::create(), SearchEngine::getSearchTypes() and
 203   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 204 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 205 * User::randomPassword() method, deprecated in 1.27, have been removed.
 206 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 207 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 208 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 209   removed.
 210 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 211 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 212   User objects to taking UserIdentity objects. Extensions implementing this
 213   interface need to be changed accordingly.
 214 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 215   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 216 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 217   UserGroupMembership::getLink() instead.
 218 * SavepointPostgres, deprecated in 1.31, has been removed.
 219 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 220   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 221   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 222   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 223 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 224   have been removed.
 225 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 226   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 227   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 228   ::showFileNotFoundError().
 229 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 230 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 231   INTL_ICU_VERSION constant directly.
 232 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 233 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 234   both deprecated in 1.32, have been removed.
 235 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 236   been removed. Use ->msg() or ->getMsg() instead.
 237 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 238   use WatchAction::getWatchToken() with action 'unwatch' directly.
 239 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 240   1.28, have been removed.
 241 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 242   deprecated in 1.32, have been removed.
 243 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 244   in 1.33, have been removed.
 245 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 246 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 247   removed.
 248 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 249 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 250 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 251 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 252 * The Block typehint only refers to blocks stored in the database. It should be
 253   updated to AbstractBlock in cases where any type of block could be expected.
 254 * FileRepoStatus, deprecated in 1.25, has been removed.
 255 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 256   in 1.27, has been removed.
 257 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 258 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 259   was deprecated in 1.25.
 260 * The jquery.byteLength module, deprecated in 1.31, was removed.
 261   Use the mediawiki.String module instead.
 262 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 263   Use require( 'mediawiki.language.specialCharacters' ) instead.
 264 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 265   directly.
 266 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 267   getErrorsOrWarnings() instead.
 268 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 269   SpecialPage::getPageTitle() instead.
 270 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 271   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 272   which are no longer used, have now been removed.
 273 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 274   specified, deprecated in 1.30, have been removed.
 275 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 276 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 277 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 278   removed. Use NS_FILE and NS_FILE_TALK respectively.
 279 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 280   (deprecated in 1.32) have been removed. Closures should be used instead.
 281 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 282   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 283   removed.
 284 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 285   method, deprecated in 1.32, have been removed.
 286 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 287 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 288   Parser::fetchFileAndTitle() instead.
 289 * The global function wfBCP47, deprecated in 1.31, has been removed.
 290 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 291   \Maintenance::countDown() method instead.
 292 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 293   deprecated since 1.20.
 294 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 295 * Linker::link() no longer accepts a string for the query array, as was
 296   deprecated in 1.20.
 297 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 298   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 299 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 300   UserGroupsChanged hook.
 301 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 302   instance from MediaWikiServices instead.
 303 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 304 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 305   Use MediaWiki\Session\SessionManager instead.
 306 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 307   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 308 * The internal method OutputPage->addScriptFile() will no longer silently drop
 309   calls that use an invalid path (i.e., something other than an absolute path,
 310   protocol-relative URL, or full scheme URL), and will instead pass them to the
 311   client where they will likely 404. This usage was deprecated in 1.24.
 312 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 313 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 314   EditFilterMergedContent hook for an alternative way to use this feature.
 315 * API module methods getDescription(), getParamDescription(), & getExamples(),
 316   all deprecated in 1.25 and ignored, have been removed.
 317 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 318   removed.
 319 * The JavaScript global variable wgLoadScript has been removed. Use
 320   mw.util.wikiScript( 'load' ) instead.
 321 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 322   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 323   in JavaScript, use mw.log.deprecate() instead.
 324 * The 'user.groups' module, deprecated in 1.28, was removed.
 325   Use the 'user' module instead.
 326 * The ResourceLoaderContext::expandModuleNames method, deprecated in 1.33, was
 327   removed. Use ResourceLoader::expandModuleNames instead.
 328 * The ability to override User::$mRights has been removed. Use
 329   PermissionManager::addTemporaryUserRights() instead.
 330 * Previously, when iterating ResultWrapper with foreach() or a similar
 331   construct, the range of the index was 1..numRows. This has been fixed to be
 332   0..(numRows-1).
 333 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 334   AuthChangeFormFields hook or security levels instead.
 335 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 336   Use WikiMap::getWikiIdFromDbDomain() instead.
 337 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 338   which were deprecated and ignored by core since 1.22, are no longer set to any
 339   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 340   updated since 2013 to cope with this deprecation may now break.
 341 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 342   or $wgResourceModules is no longer supported.
 343   Use the 'class' or 'factory' option of the array format instead.
 344 * The parameter $lang of the functions generateTOC and tocList in Linker and
 345   DummyLinker must be in type Language when present. Other types are
 346   deprecated since 1.33.
 347 * The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29,
 348   have been removed.
 349 * ParserOption::getSpeculativeRevIdCallback(), deprecated in 1.28, has been
 350   removed.
 351 * The UploadVerification hook, deprecated in 1.28, has been removed. Instead,
 352   use the UploadVerifyFile hook.
 353 * UploadBase:: and UploadFromChunks::stashFileGetKey() and stashSession(),
 354   deprecated in 1.28, have been removed. Instead, please use the getFileKey()
 355   method on the response from doStashFile().
 356 * LBFactory::setDomainPrefix() and LoadBalancer::setDomainPrefix(), deprecated
 357   in 1.33, have been removed. Use setLocalDomainPrefix() instead.
 358 * IDatabase::implicitGroupby(), deprecated in 1.30, has been removed.
 359 * IDatabase::doneWrites(), deprecated in 1.31, has been removed.
 360   Use IDatabase::lastDoneWrites() instead.
 361 * Database::reportConnectionError(), deprecated in 1.32, has been removed.
 362 * LoadBalancer::laggedSlaveUsed(), deprecated in 1.28, has been removed.
 363   Use LoadBalancer::laggedReplicaUsed() instead.
 364 * Database::getProperty(), deprecated in 1.28, has been removed.
 365 * IDatabase::getWikiId(), deprecated in 1.30, has been removed.
 366   Use IDatabase::getDomainID() instead.
 367 * (T191231) Support for using Oracle or MSSQL as database backends has been
 368   dropped.
 369 * MessageCache::destroyInstance() has been removed. Instead, call
 370   MediaWikiTestCase::resetServices().
 371 * SearchResult protected field $searchEngine is removed and no longer
 372   initialized after calling SearchResult::initFromTitle().
 373 * The UserIsBlockedFrom hook is only called if a block is found first, and
 374   should only be used to unblock a blocked user.
 375 * Parameters for index.php from PATH_INFO, such as the title, are no longer
 376   written to $_GET.
 377 * …
 378
 379 === Deprecations in 1.34 ===
 380 * The MWNamespace class is deprecated. Use NamespaceInfo.
 381 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 382   Instead, use ->queue().
 383 * User::isBlocked() is deprecated since it does not tell you if the user is
 384   blocked from editing a particular page. Use User::getBlock() or
 385   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 386 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 387   to the BlockManager as private helper methods.
 388 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 389   instead.
 390 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 391   is deprecated. Pass only the User argument.
 392 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 393 * Passing a Title as the first parameter to the getTimestampById method of
 394   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 395 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 396   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 397 * The Title parameter to RevisionLookup::getPreviousRevision and
 398   RevisionLookup::getNextRevision is deprecated and should be omitted.
 399 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 400 * The Http class is deprecated. For the request, get, and post methods, use
 401   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 402   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 403   MultiHttpClient directly.
 404 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 405   engine will eventually be made the only engine for HTTP requests.
 406 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 407   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 408   deprecated. Use MediaWikiServices instead.
 409 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 410   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 411 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 412 * The Block class is separated into DatabaseBlock (for blocks stored in the
 413   database), and SystemBlock (for temporary blocks created by the system).
 414   SystemBlock should be used when creating any temporary blocks. Block is
 415   a deprecated alias for DatabaseBlock.
 416 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 417   Some context can be found at T224165.
 418 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 419 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 420   MovePage::moveSubpagesIfAllowed.
 421 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 422 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 423 * Language::viewPrevNext function is deprecated, use
 424   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 425 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 426   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 427 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 428   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 429   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 430 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 431   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 432   instead. Elsewhere, use the methods from the ResourceLoader class.
 433 * The 'jquery.accessKeyLabel' module has been deprecated. This jQuery
 434   plugin is now ships as part of the 'mediawiki.util' module bundle.
 435 * The Profiler::setTemplated and Profiler::getTemplated methods have been
 436   deprecated. Use Profiler::setAllowOutput and Profiler::getAllowOutput
 437   instead.
 438 * The Preprocessor_DOM implementation has been deprecated.  It will be
 439   removed in a future release.  Use the Preprocessor_Hash implementation
 440   instead.
 441 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 442   have been deprecated; they will be made private in the future.
 443 * SearchResult::termMatches() method is deprecated. It was unreliable because
 444   only populated by few search engine implementations. Use
 445   SqlSearchResult::getTermMatches() if really needed.
 446 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 447   and should no longer be passed. Search engine implemenations should be
 448   responsible for carrying relevant information needed for highlighting with
 449   their own SearchResultSet/SearchResult sub-classes.
 450 * SearchResultSet::free() method is deprecated.
 451 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 452   SearchDatabase.
 453 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 454   hooks is highly discouraged as it's only populated by SearchDatabase search
 455   engines.
 456 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 457   template option 'searchaction' instead.
 458 * Skin::getRevisionId() and Skin::isRevisionCurrent() have been deprecated.
 459   Use OutputPage::getRevisionId() and OutputPage::isRevisionCurrent() instead.
 460 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 461   been deprecated.
 462 * FileBackend::getWikiId() has been deprecated.
 463   Use FileBackend::getDomainId() instead.
 464 * User::getRights() and User::$mRights have been deprecated. Use
 465   PermissionManager::getUserPermissions() instead.
 466 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 467   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 468 * SVGMetadataExtractor::getMetadata has been deprecated. Instead, you should
 469   use SVGReader->getMetadata() directly.
 470 * The following public properties on AbstractBlock are deprecated: $mReason,
 471   $mTimestamp, $mExpiry, $mHideName. Use the getters/setters instead.
 472 * The following public properties on DatabaseBlock are deprecated: $mAuto,
 473   $mParentBlockId. To check for an autoblock use DatabaseBlock::getType; to
 474   check for the parent ID, use DatabaseBlock::getParentBlockId.
 475 * SearchEngine::userHighlightPrefs() is deprecated, simply stop passing
 476   $contextlines and $contextchars to the SearchHighlighter methods, they will
 477   use proper defaults defined in SearchHighlighter::DEFAULT_CONTEXT_LINES and
 478   DEFAULT_CONTEXT_CHARS.
 479 * SearchUpdate constructor: passing a string as the title param and or a boolean
 480   or a string as the content will produce a deprecation warning.
 481 * SearchEngine::getTextFromContent() is deprecated, use getTextForSearchIndex()
 482   directly from the Content object.
 483 * SearchEngine::textAlreadyUpdatedForIndex() is deprecated, given the
 484   deprecation above this method is no longer needed/called and should not be
 485   implemented by SearchEngine implementation.
 486 * IDatabase::bufferResults() has been deprecated. Use query batching instead.
 487 * MessageCache::singleton() is deprecated. Use
 488   MediaWikiServices::getMessageCache().
 489 * Constructing MovePage directly is deprecated. Use MovePageFactory.
 490 * TempFSFile::factory() has been deprecated. Use TempFSFileFactory instead.
 491 * wfIsBadImage() is deprecated. Use the BadFileLookup service instead.
 492 * Building a new SearchResult is hard-deprecated, always call
 493   SearchResult::newFromTitle(). This class is being refactored into an abstract
 494   class. If you extend this class please be sure to override all its methods
 495   or extend RevisionSearchResult.
 496 * Skin::getSkinNameMessages() is deprecated and no longer used.
 497 * The mediawiki.RegExp module is deprecated; use mw.util.escapeRegExp() instead.
 498 * Specifying a SpecialPage object for the list of special pages (either through
 499   the SpecialPage_initList hook or by adding to $wgSpecialPages) is now
 500   deprecated.
 501
 502 === Other changes in 1.34 ===
 503 * …
 504
 505 == Compatibility ==
 506 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 507 supported, it is generally advised to use PHP 7.0.13 or later for long term
 508 support. It also requires the following PHP extensions:
 509
 510 * ctype
 511 * dom
 512 * fileinfo
 513 * iconv
 514 * json
 515 * mbstring
 516 * xml
 517
 518 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 519 but support for them is somewhat less mature.
 520
 521 The supported versions are:
 522
 523 * MySQL 5.5.8 or later
 524 * PostgreSQL 9.2 or later
 525 * SQLite 3.8.0 or later
 526
 527 == Online documentation ==
 528 Documentation for both end-users and site administrators is available on
 529 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 530 for pages that explicitly state that their contents are in the public domain):
 531
 532        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 533
 534 == Mailing list ==
 535 A mailing list is available for MediaWiki user support and discussion:
 536
 537        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 538
 539 A low-traffic announcements-only list is also available:
 540
 541        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 542
 543 It's highly recommended that you sign up for one of these lists if you're
 544 going to run a public MediaWiki, so you can be notified of security fixes.
 545
 546 == IRC help ==
 547 There's usually someone online in #mediawiki on irc.freenode.net.