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