RELEASE-NOTES-1.34

   1 = MediaWiki 1.34 =
   2
   3 == MediaWiki 1.34.0-PRERELEASE ==
   4
   5 THIS IS NOT A RELEASE YET
   6
   7 MediaWiki 1.34 is an alpha-quality development branch, and is not recommended
   8 for use in production.
   9
  10 == Upgrading notes for 1.34 ==
  11 1.34 has several database changes since 1.33, and will not work without schema
  12 updates. Note that due to changes to some very large tables like the revision
  13 table, the schema update may take quite long (minutes on a medium sized site,
  14 many hours on a large site).
  15
  16 Don't forget to always back up your database before upgrading!
  17
  18 See the file UPGRADE for more detailed upgrade instructions, including
  19 important information when upgrading from versions prior to 1.11.
  20
  21 Some specific notes for MediaWiki 1.34 upgrades are below:
  22
  23 * …
  24
  25 For notes on 1.33.x and older releases, see HISTORY.
  26
  27 === Configuration changes for system administrators in 1.34 ===
  28
  29 ==== New configuration ====
  30 * $wgAllowExternalReqID (T201409) - This configuration setting controls whether
  31   Mediawiki accepts the request ID set by the incoming request via the
  32   `X-Request-Id` header. If set to `true`, that value will be used throughout
  33   the code as the request identificator. Otherwise, the sent header will be
  34   ignored and the request ID will either be taken from Apache's mod_unique
  35   module or will be generated by Mediawiki itself (depending on the set-up).
  36 * $wgEnableSpecialMute (T218265) - This configuration controls whether
  37   Special:Mute is available and whether to include a link to it on emails
  38   originating from Special:Email.
  39 * editmyuserjsredirect user right – users without this right now cannot edit JS
  40   redirects in their userspace unless the target of the redirect is also in
  41   their userspace. By default, this right is given to everyone.
  42
  43 ==== Changed configuration ====
  44 * $wgUseCdn, $wgCdnServers, $wgCdnServersNoPurge, and $wgCdnMaxAge – These four
  45   CDN-related config variables have been renamed from being specific to Squid –
  46   they were previously $wgUseSquid, $wgSquidServers, $wgSquidServersNoPurge, and
  47   $wgSquidMaxage respectively. This aligns them with the related existing
  48   variable $wgCdnMaxageLagged. The previous configuration variable names are
  49   deprecated, but will be used as the fall back if they are still set.
  50   Note that wgSquidPurgeUseHostHeader has not been renamed, as it is deprecated.
  51 * (T27707) File type checks for image uploads have been relaxed to allow files
  52   containing some HTML markup in metadata. As a result, the $wgAllowTitlesInSVG
  53   setting is no longer applied and is now always true. Note that MSIE 7 may
  54   still be able to misinterpret certain malformed PNG files as HTML.
  55 * Introduced $wgVerifyMimeTypeIE to allow disabling the MSIE 6/7 file type
  56   detection heuristic on upload, which is more conservative than the checks
  57   that were changed above.
  58 * $wgSkipSkin — Setting this instead of $wgSkipSkins, deprecated in 1.23, is now
  59   hard-deprecated.
  60 * $wgLocalInterwiki — Setting this instead of $wgLocalInterwikis, deprecated in
  61   1.23, is now hard-deprecated.
  62 * $wgProfileOnly — Setting this, deprecated in 1.23, is now hard-deprecated.
  63   Instead, set the log file in $wgDebugLogGroups['profileoutput'].
  64 * $wgProxyList — Setting this to an array with IP addresses in the array keys,
  65   which was deprecated in 1.30, no longer works. Instead, $wgProxyList should be
  66   an array with IP addresses as the values, or a string path to a file
  67   containing one IP address per line.
  68 * …
  69
  70 ==== Removed configuration ====
  71 * $wgWikiDiff2MovedParagraphDetectionCutoff — If you still want a custom change
  72   size threshold, please specify in php.ini, using the configuration variable
  73   wikidiff2.moved_paragraph_detection_cutoff.
  74 * $wgDebugPrintHttpHeaders - The default of including HTTP headers in the
  75   debug log channel is no longer configurable. The debug log itself remains
  76   configurable via $wgDebugLogFile.
  77 * $wgPasswordSalt – This setting, used for migrating exceptionally old, insecure
  78   password setups and deprecated since 1.24, is now removed.
  79 * $wgDBOracleDRCP - If you must use persistent connections, set DBO_PERSISTENT
  80   in the 'flags' field for servers in $wgDBServers (or $wgLBFactoryConf).
  81
  82 === New user-facing features in 1.34 ===
  83 * Special:Mute has been added as a quick way for users to block unwanted emails
  84   from other users originating from Special:EmailUser.
  85
  86 === New developer features in 1.34 ===
  87 * The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification
  88   of headers in private wikis.
  89 * Language::formatTimePeriod now supports the new 'avoidhours' option to output
  90   strings like "5 days ago" instead of "5 days 13 hours ago".
  91 * (T220163) Added SpecialMuteModifyFormFields hook to allow extensions
  92   to add fields to Special:Mute.
  93 * (T100896) Skin authors can define custom OOUI themes using OOUIThemePaths.
  94   See <https://www.mediawiki.org/wiki/OOUI/Themes> for details.
  95 * The HtmlCacheUpdater service was added to unify the logic of purging CDN cache
  96   and HTML file cache to simplify callers and make them more consistent.
  97
  98 === External library changes in 1.34 ===
  99
 100 ==== New external libraries ====
 101 * …
 102
 103 ==== Changed external libraries ====
 104 * Updated Mustache from 1.0.0 to v3.0.1.
 105 * Updated OOUI from v0.31.3 to v0.33.4.
 106 * Updated composer/semver from 1.4.2 to 1.5.0.
 107 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
 108 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
 109 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
 110 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
 111 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
 112 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
 113 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
 114 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
 115 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
 116 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
 117 * …
 118
 119 ==== Removed external libraries ====
 120 * The jquery.async module, deprecated in 1.33, was removed.
 121 * …
 122
 123 === Bug fixes in 1.34 ===
 124 * (T222529) If a log entry or page revision is recorded in the database with an
 125   empty username, attempting to display it will log an error and return a "no
 126   username available" to the user instead of silently displaying nothing or
 127   invalid links.
 128
 129 === Action API changes in 1.34 ===
 130 * The 'recenteditcount' response property from action=query list=allusers,
 131   deprecated in 1.25, has been removed.
 132
 133 === Action API internal changes in 1.34 ===
 134 * …
 135
 136 === Languages updated in 1.34 ===
 137 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 138 Below only new and removed languages are listed, as well as changes to languages
 139 because of Phabricator reports.
 140
 141 * (T152908) Added language support for N'Ko (nqo).
 142
 143 === Breaking changes in 1.34 ===
 144 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 145   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 146   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 147 * Preferences class, deprecated in 1.31, has been removed.
 148 * The following parts of code, deprecated in 1.32, were removed in favor of
 149   built-in PHP functions:
 150   * CryptRand class
 151   * CryptRand service
 152   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 153 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 154   create a new Language object with a different language code.
 155 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 156   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 157   Instead, reset services, such as by calling $this->overrideMwServices() (if
 158   your test extends MediaWikiTestCase). Services will generally not pick up
 159   configuration changes from after they were created, so you must reset
 160   services after any configuration change. Even if your code works now, it is
 161   likely to break in future versions as more code is moved to services.
 162 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 163 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 164   been removed.
 165 * ObjectFactory class, deprecated in 1.31, has been removed.
 166 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 167 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 168 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 169   This behavior was removed, and the method now matches the parent signature
 170   (SpecialPage::execute) which is to return HTML string or void.
 171   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 172 * The 'recenteditcount' response property from action API action=query
 173   list=allusers, deprecated in 1.25, has been removed.
 174 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 175   SearchEngine::create(), SearchEngine::getSearchTypes() and
 176   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 177 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 178 * User::randomPassword() method, deprecated in 1.27, have been removed.
 179 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 180 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 181 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 182   removed.
 183 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 184 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 185   User objects to taking UserIdentity objects. Extensions implementing this
 186   interface need to be changed accordingly.
 187 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 188   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 189 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 190   UserGroupMembership::getLink() instead.
 191 * SavepointPostgres, deprecated in 1.31, has been removed.
 192 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 193   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 194   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 195   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 196 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 197   have been removed.
 198 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 199   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 200   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 201   ::showFileNotFoundError().
 202 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 203 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 204   INTL_ICU_VERSION constant directly.
 205 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 206 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 207   both deprecated in 1.32, have been removed.
 208 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 209   been removed. Use ->msg() or ->getMsg() instead.
 210 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 211   use WatchAction::getWatchToken() with action 'unwatch' directly.
 212 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 213   1.28, have been removed.
 214 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 215   deprecated in 1.32, have been removed.
 216 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 217   in 1.33, have been removed.
 218 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 219 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 220   removed.
 221 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 222 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 223 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 224 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 225 * The Block typehint only refers to blocks stored in the database. It should be
 226   updated to AbstractBlock in cases where any type of block could be expected.
 227 * FileRepoStatus, deprecated in 1.25, has been removed.
 228 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 229   in 1.27, has been removed.
 230 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 231 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 232   was deprecated in 1.25.
 233 * The jquery.byteLength module, deprecated in 1.31, was removed.
 234   Use the mediawiki.String module instead.
 235 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 236   Use require( 'mediawiki.language.specialCharacters' ) instead.
 237 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 238   directly.
 239 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 240   getErrorsOrWarnings() instead.
 241 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 242   SpecialPage::getPageTitle() instead.
 243 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 244   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 245   which are no longer used, have now been removed.
 246 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 247   specified, deprecated in 1.30, have been removed.
 248 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 249 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 250 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 251   removed. Use NS_FILE and NS_FILE_TALK respectively.
 252 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 253   (deprecated in 1.32) have been removed. Closures should be used instead.
 254 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 255   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 256   removed.
 257 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 258   method, deprecated in 1.32, have been removed.
 259 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 260 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 261   Parser::fetchFileAndTitle() instead.
 262 * The global function wfBCP47, deprecated in 1.31, has been removed.
 263 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 264   \Maintenance::countDown() method instead.
 265 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 266   deprecated since 1.20.
 267 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 268 * Linker::link() no longer accepts a string for the query array, as was
 269   deprecated in 1.20.
 270 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 271   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 272 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 273   UserGroupsChanged hook.
 274 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 275   instance from MediaWikiServices instead.
 276 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 277 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 278   Use MediaWiki\Session\SessionManager instead.
 279 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 280   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 281 * The internal method OutputPage->addScriptFile() will no longer silently drop
 282   calls that use an invalid path (i.e., something other than an absolute path,
 283   protocol-relative URL, or full scheme URL), and will instead pass them to the
 284   client where they will likely 404. This usage was deprecated in 1.24.
 285 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 286 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 287   EditFilterMergedContent hook for an alternative way to use this feature.
 288 * API module methods getDescription(), getParamDescription(), & getExamples(),
 289   all deprecated in 1.25 and ignored, have been removed.
 290 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 291   removed.
 292 * The JavaScript global variable wgLoadScript has been removed. Use
 293   mw.util.wikiScript( 'load' ) instead.
 294 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 295   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 296   in JavaScript, use mw.log.deprecate() instead.
 297 * The 'user.groups' module, deprecated in 1.28, was removed.
 298   Use the 'user' module instead.
 299 * The ResourceLoaderContext::expandModuleNames method, deprecated in 1.33, was
 300   removed. Use ResourceLoader::expandModuleNames instead.
 301 * The ability to override User::$mRights has been removed. Use
 302   PermissionManager::addTemporaryUserRights() instead.
 303 * Previously, when iterating ResultWrapper with foreach() or a similar
 304   construct, the range of the index was 1..numRows. This has been fixed to be
 305   0..(numRows-1).
 306 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 307   AuthChangeFormFields hook or security levels instead.
 308 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 309   Use WikiMap::getWikiIdFromDbDomain() instead.
 310 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 311   which were deprecated and ignored by core since 1.22, are no longer set to any
 312   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 313   updated since 2013 to cope with this deprecation may now break.
 314 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 315   or $wgResourceModules is no longer supported.
 316   Use the 'class' or 'factory' option of the array format instead.
 317 * The parameter $lang of the functions generateTOC and tocList in Linker and
 318   DummyLinker must be in type Language when present. Other types are
 319   deprecated since 1.33.
 320 * The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29,
 321   have been removed.
 322 * ParserOption::getSpeculativeRevIdCallback(), deprecated in 1.28, has been
 323   removed.
 324 * The UploadVerification hook, deprecated in 1.28, has been removed. Instead,
 325   use the UploadVerifyFile hook.
 326 * UploadBase:: and UploadFromChunks::stashFileGetKey() and stashSession(),
 327   deprecated in 1.28, have been removed. Instead, please use the getFileKey()
 328   method on the response from doStashFile().
 329 * LBFactory::setDomainPrefix() and LoadBalancer::setDomainPrefix(), deprecated
 330   in 1.33, have been removed. Use setLocalDomainPrefix() instead.
 331 * IDatabase::implicitGroupby(), deprecated in 1.30, has been removed.
 332 * IDatabase::doneWrites(), deprecated in 1.31, has been removed.
 333   Use IDatabase::lastDoneWrites() instead.
 334 * Database::reportConnectionError(), deprecated in 1.32, has been removed.
 335 * LoadBalancer::laggedSlaveUsed(), deprecated in 1.28, has been removed.
 336   Use LoadBalancer::laggedReplicaUsed() instead.
 337 * Database::getProperty(), deprecated in 1.28, has been removed.
 338 * IDatabase::getWikiId(), deprecated in 1.30, has been removed.
 339   Use IDatabase::getDomainID() instead.
 340 * …
 341
 342 === Deprecations in 1.34 ===
 343 * The MWNamespace class is deprecated. Use NamespaceInfo.
 344 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 345   Instead, use ->queue().
 346 * User::isBlocked() is deprecated since it does not tell you if the user is
 347   blocked from editing a particular page. Use User::getBlock() or
 348   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 349 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 350   to the BlockManager as private helper methods.
 351 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 352   instead.
 353 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 354   is deprecated. Pass only the User argument.
 355 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 356 * Passing a Title as the first parameter to the getTimestampById method of
 357   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 358 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 359   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 360 * The Title parameter to RevisionLookup::getPreviousRevision and
 361   RevisionLookup::getNextRevision is deprecated and should be omitted.
 362 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 363 * The Http class is deprecated. For the request, get, and post methods, use
 364   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 365   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 366   MultiHttpClient directly.
 367 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 368   engine will eventually be made the only engine for HTTP requests.
 369 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 370   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 371   deprecated. Use MediaWikiServices instead.
 372 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 373   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 374 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 375 * The Block class is separated into DatabaseBlock (for blocks stored in the
 376   database), and SystemBlock (for temporary blocks created by the system).
 377   SystemBlock should be used when creating any temporary blocks. Block is
 378   a deprecated alias for DatabaseBlock.
 379 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 380   Some context can be found at T224165.
 381 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 382 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 383   MovePage::moveSubpagesIfAllowed.
 384 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 385 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 386 * Language::viewPrevNext function is deprecated, use
 387   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 388 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 389   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 390 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 391   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 392   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 393 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 394   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 395   instead. Elsewhere, use the methods from the ResourceLoader class.
 396 * The Preprocessor_DOM implementation has been deprecated.  It will be
 397   removed in a future release.  Use the Preprocessor_Hash implementation
 398   instead.
 399 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 400   have been deprecated; they will be made private in the future.
 401 * SearchResult::termMatches() method is deprecated. It was unreliable because
 402   only populated by few search engine implementations. Use
 403   SqlSearchResult::getTermMatches() if really needed.
 404 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 405   and should no longer be passed. Search engine implemenations should be
 406   responsible for carrying relevant information needed for highlighting with
 407   their own SearchResultSet/SearchResult sub-classes.
 408 * SearchResultSet::free() method is deprecated.
 409 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 410   SearchDatabase.
 411 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 412   hooks is highly discouraged as it's only populated by SearchDatabase search
 413   engines.
 414 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 415   template option 'searchaction' instead.
 416 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 417   been deprecated.
 418 * User::getRights() and User::$mRights have been deprecated. Use
 419   PermissionManager::getUserPermissions() instead.
 420 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 421   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 422 * SVGMetadataExtractor::getMetadata has been deprecated. Instead, you should
 423   use SVGReader->getMetadata() directly.
 424 * The following public properties on AbstractBlock are deprecated: $mReason,
 425   $mTimestamp, $mExpiry, $mHideName. Use the getters/setters instead.
 426 * The following public properties on DatabaseBlock are deprecated: $mAuto,
 427   $mParentBlockId. To check for an autoblock use DatabaseBlock::getType; to
 428   check for the parent ID, use DatabaseBlock::getParentBlockId.
 429 * SearchEngine::userHighlightPrefs() is deprecated, simply stop passing
 430   $contextlines and $contextchars to the SearchHighlighter methods, they will
 431   use proper defaults defined in SearchHighlighter::DEFAULT_CONTEXT_LINES and
 432   DEFAULT_CONTEXT_CHARS.
 433 * SearchUpdate constructor: passing a string as the title param and or a boolean
 434   or a string as the content will produce a deprecation warning.
 435 * SearchEngine::getTextFromContent() is deprecated, use getTextForSearchIndex()
 436   directly from the Content object.
 437 * SearchEngine::textAlreadyUpdatedForIndex() is deprecated, given the
 438   deprecation above this method is no longer needed/called and should not be
 439   implemented by SearchEngine implementation.
 440 * Title::purgeSquid is deprecated. Use MediaWikiServices::getHtmlCacheUpdater.
 441
 442 === Other changes in 1.34 ===
 443 * …
 444
 445 == Compatibility ==
 446 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 447 supported, it is generally advised to use PHP 7.0.13 or later for long term
 448 support.
 449
 450 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 451 but support for them is somewhat less mature. There is experimental support for
 452 Oracle and Microsoft SQL Server.
 453
 454 The supported versions are:
 455
 456 * MySQL 5.5.8 or later
 457 * PostgreSQL 9.2 or later
 458 * SQLite 3.8.0 or later
 459 * Oracle 9.0.1 or later
 460 * Microsoft SQL Server 2005 (9.00.1399)
 461
 462 == Online documentation ==
 463 Documentation for both end-users and site administrators is available on
 464 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 465 for pages that explicitly state that their contents are in the public domain):
 466
 467        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 468
 469 == Mailing list ==
 470 A mailing list is available for MediaWiki user support and discussion:
 471
 472        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 473
 474 A low-traffic announcements-only list is also available:
 475
 476        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 477
 478 It's highly recommended that you sign up for one of these lists if you're
 479 going to run a public MediaWiki, so you can be notified of security fixes.
 480
 481 == IRC help ==
 482 There's usually someone online in #mediawiki on irc.freenode.net.