RELEASE-NOTES-1.25

   1 Security reminder: If you have PHP's register_globals option set, you must
   2 turn it off. MediaWiki will not work with it enabled.
   3
   4 == MediaWiki 1.25 ==
   5
   6 THIS IS NOT A RELEASE YET
   7
   8 MediaWiki 1.25 is an alpha-quality branch and is not recommended for use in
   9 production.
  10
  11 === Configuration changes in 1.25 ===
  12 * $wgPageShowWatchingUsers was removed.
  13 * $wgLocalVirtualHosts has been added to replace $wgConf->localVHosts.
  14 * $wgAntiLockFlags was removed.
  15 * $wgJavaScriptTestConfig was removed.
  16 * Edit tokens returned from User::getEditToken may change on every call. Token
  17   validity must be checked by passing the user-supplied token to
  18   User::matchEditToken rather than by testing for equality with a
  19   newly-generated token.
  20 * (T74951) The UserGetLanguageObject hook may be passed any IContextSource
  21   for its $context parameter. Formerly it was documented as receiving a
  22   RequestContext specifically.
  23 * Profiling was restructured and $wgProfiler now requires an 'output' parameter.
  24   See StartProfiler.sample for details.
  25 * $wgMangleFlashPolicy was added to make MediaWiki's mangling of anything that
  26   might be a flash policy directive configurable.
  27 * ApiOpenSearch now supports XML output. The OpenSearchXml extension should no
  28   longer be used. If extracts and page images are desired, the TextExtracts and
  29   PageImages extensions are required.
  30 * $wgOpenSearchTemplate is deprecated in favor of $wgOpenSearchTemplates.
  31 * Edits are now prepared via AJAX as users type edit summaries. This behavior
  32   can be disabled via $wgAjaxEditStash.
  33 * (T46740) The temporary option $wgIncludejQueryMigrate was removed, along
  34   with the jQuery Migrate library, as indicated when this option was provided in
  35   MediaWiki 1.24.
  36 * ProfilerStandard and ProfilerSimpleTrace were removed. Make sure that any
  37   StartProfiler.php config is updated to reflect this. Xhprof is available
  38   for zend/hhvm. Also, for hhvm, one can consider using its xenon profiler.
  39 * Default value of $wgSVGConverters['rsvg'] now uses the 'rsvg-convert' binary
  40   rather than 'rsvg'.
  41 * Default value of $wgSVGConverters['ImageMagick'] now uses transparent
  42   background with white fallback color, rather than just white background.
  43  * MediaWikiBagOStuff class removed, make sure any object cache config
  44    uses SqlBagOStuff instead.
  45 * The 'daemonized' flag must be set to true in $wgJobTypeConf for any redis
  46   job queues. This means that mediawiki/services/jobrunner service has to
  47   be installed and running for any such queues to work.
  48 * $wgAutopromoteOnce no longer supports the 'view' event. For keeping some
  49   compatibility, any 'view' event triggers will still trigger on 'edit'.
  50
  51 === New features in 1.25 ===
  52 * (T64861) Updated plural rules to CLDR 26. Includes incompatible changes
  53   for plural forms in Russian, Prussian, Tagalog, Manx and several languages
  54   that fall back to Russian.
  55 * (T60139) ResourceLoaderFileModule now supports language fallback
  56   for 'languageScripts'.
  57 * Added a new hook, "ContentAlterParserOutput", to allow extensions to modify the
  58   parser output for a content object before links update.
  59 * (T37785) Enhanced recent changes and extended watchlist are now default.
  60   Documentation: https://meta.wikimedia.org/wiki/Help:Enhanced_recent_changes
  61   and https://www.mediawiki.org/wiki/Manual:$wgDefaultUserOptions.
  62 * (T69341) SVG images will no longer be base64-encoded when being embedded
  63   in CSS. This results in slight size increase before gzip compression (due to
  64   percent-encoding), but up to 20% decrease after it.
  65 * Update jStorage to v0.4.12.
  66 * MediaWiki now natively supports page status indicators: icons (or short text
  67   snippets) usually displayed in the top-right corner of the page. They have
  68   been in use on Wikipedia for a long time, implemented using templates and CSS
  69   absolute positioning.
  70   - Basic wikitext syntax: <indicator name="foo">[[File:Foo.svg|20px]]</indicator>
  71   - Usage instructions: https://www.mediawiki.org/wiki/Help:Page_status_indicators
  72   - Adjusting custom skins to support indicators:
  73     https://www.mediawiki.org/wiki/Manual:Skinning#Page_status_indicators
  74 * Edit tokens may now be time-limited: passing a maximum age to
  75   User::matchEditToken will reject any older tokens.
  76 * The debug logging internals have been overhauled, and are now using the
  77   PSR-3 interfaces.
  78 * Update CSSJanus to v1.1.1.
  79 * Update lessphp to v0.5.0.
  80 * Added a hook, "ApiOpenSearchSuggest", to allow extensions to provide extracts
  81   and images for ApiOpenSearch output. The semantics are identical to the
  82   "OpenSearchXml" hook provided by the OpenSearchXml extension.
  83 * PrefixSearchBackend hook now has an $offset parameter. Combined with $limit,
  84   this allows for pagination of prefix results. Extensions using this hook
  85   should implement supporting behavior. Not doing so can result in undefined
  86   behavior from API clients trying to continue through prefix results.
  87 * Update jQuery from v1.11.1 to v1.11.2.
  88 * External libraries installed via composer will now be displayed
  89   on Special:Version in their own section. Extensions or skins that are
  90   installed via composer will not be shown in this section as it is assumed
  91   they will add the proper credits to the skins or extensions section. They
  92   can also be accessed through the API via the new siprop=libraries to
  93   ApiQuerySiteInfo.
  94 * Update QUnit from v1.14.0 to v1.16.0.
  95 * Update Moment.js from v2.8.3 to v2.8.4.
  96 * Special:Tags now allows for manipulating the list of user-modifiable change
  97   tags. Actually modifying the tagging of a revision or log entry is not
  98   implemented yet.
  99 * Added 'managetags' user right and 'ChangeTagCanCreate', 'ChangeTagCanDelete',
 100   and 'ChangeTagCanCreate' hooks to allow for managing user-modifiable change
 101   tags.
 102 * Added 'ChangeTagsListActive' hook, to separate the concepts of "defined" and
 103   "active" formerly conflated by the 'ListDefinedTags' hook.
 104 * Added TemplateParser class that provides a server-side interface to cachable
 105   dynamically-compiled Mustache templates (currently uses lightncandy library).
 106 * Clickable anchors for each section heading in the content are now generated
 107   and appear in the gutter on hovering over the heading.
 108 * Added 'CategoryViewer::doCategoryQuery' and 'CategoryViewer::generateLink' hooks
 109   to allow extensions to override how links to pages are rendered within NS_CATEGORY
 110 * (T19665) Special:WantedPages only lists page which having at least one red link
 111   pointing to it.
 112 * New hooks 'ApiMain::moduleManager' and 'ApiQuery::moduleManager', can be
 113   used for conditional registration of API modules.
 114 * New hook 'EnhancedChangesList::getLogText' to alter, remove or add to the
 115   links of a group of changes in EnhancedChangesList.
 116 * A full interface for StatsD metric reporting has been added to the context
 117   interface, reachable via IContextSource::getStats().
 118 * Move the jQuery Client library from being mastered in MediaWiki as v0.1.0 to a
 119   proper, published library, which is now tagged as v1.0.0.
 120 * A new message (defaulting to blank), 'editnotice-notext', can be shown to users
 121   when they are editing if no edit notices apply to the page being edited.
 122
 123 ==== External libraries ====
 124 * MediaWiki now requires certain external libraries to be installed. In the past
 125   these were bundled inside the Git repository of MediaWiki core, but now they
 126   need to be installed separately. For users using the tarball, this will be taken
 127   care of and no action will be required. Users using Git will either need to use
 128   composer to fetch dependencies or use the mediawiki/vendor repository which includes
 129   all dependencies for MediaWiki core and ones used in Wikimedia deployment. Detailed
 130   instructions can be found at:
 131   https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries
 132 * The following libraries are now required:
 133 ** psr/log
 134    This library provides the interfaces set by the PSR-3 standard (http://www.php-fig.org/psr/psr-3/)
 135    which are used by MediaWiki internally via the
 136    MediaWiki\Logger\LoggerFactory class.
 137    See the structured logging RfC (https://www.mediawiki.org/wiki/Requests_for_comment/Structured_logging)
 138    for more background information.
 139 ** cssjanus/cssjanus
 140    This library was formerly bundled with MediaWiki core and has been removed.
 141    It automatically flips CSS for RTL support.
 142 ** leafo/lessphp
 143    This library was formerly bundled with MediaWiki core and has been removed.
 144    It compiles LESS files into CSS.
 145 ** wikimedia/cdb
 146    This library was formerly a part of MediaWiki core, and has been moved into a separate library.
 147    It provides CDB functions which are used in the Interwiki and Localization caches.
 148    More information about the library can be found at https://www.mediawiki.org/wiki/CDB.
 149 ** liuggio/statsd-php-client
 150    This library provides a StatsD client API for logging application metrics to a remote server.
 151
 152 === Bug fixes in 1.25 ===
 153 * (T73003) No additional code will be generated to try to load CSS-embedded
 154   SVG images in Internet Explorer 6 and 7, as they don't support them anyway.
 155 * (T69021) On Special:BookSources, corrected validation of ISBNs (both
 156   10- and 13-digit forms) containing "X".
 157 * Page moving was refactored into a MovePage class. As part of that:
 158 ** The AbortMove hook was removed.
 159 ** MovePageIsValidMove is for extensions to specify whether a page
 160    cannot be moved for technical reasons, and should not be overridden.
 161 ** MovePageCheckPermissions is for checking whether the given user is
 162    allowed to make the move.
 163 ** Title::moveNoAuth() was deprecated. Use the MovePage class instead.
 164 ** Title::moveTo() was deprecated. Use the MovePage class instead.
 165 ** Title::isValidMoveOperation() broken down into MovePage::isValidMove()
 166    and MovePage::checkPermissions().
 167 * (T18530) Multiple autocomments are now formatted in an edit summary.
 168 * (T70361) Autocomments containing "/*" are parsed correctly.
 169 * The Special:WhatLinksHere page linked from 'Number of redirects to this page'
 170   on action=info about a file page does not list file links anymore.
 171 * (T78637) Search bar is not autofocused unless it is empty so that proper scrolling using arrow keys is possible.
 172 * (T50853) Database::makeList() modified to handle 'NULL' separately when building IN clause
 173 * (T85192) Captcha position modified in Usercreate template. As a result:
 174 ** extrafields parameter added to Usercreate.php to insert additional data
 175 ** 'extend' method added to QuickTemplate to append additional values to any field of data array
 176 * (T86974) Several Title methods now load from the database when necessary
 177   (instead of returning incorrect results) even when the page ID is known.
 178 * (T74070) Duplicate search for archived files on file upload now omits the extension.
 179   This requires the fa_sha1 field being populated.
 180 * Removed rel="archives" from the "View history" link, as it did not pass
 181   HTML validation.
 182 * $wgUseTidy is now set when parserTests are run with the tidy option to match
 183   output on wiki.
 184
 185 === Action API changes in 1.25 ===
 186 * (T67403) XML tag highlighting is now only performed for formats
 187   "xmlfm" and "wddxfm".
 188 * action=paraminfo supports generalized submodules (modules=query+value),
 189   querymodules and formatmodules are deprecated
 190 * action=paraminfo no longer outputs descriptions and other help text by
 191   default. If needed, it may be requested using the new 'helpformat' parameter.
 192 * action=help has been completely rewritten, and outputs help in HTML
 193   rather than plain text.
 194 * Hitting api.php without specifying an action now displays only the help for
 195   the main module, with links to submodule help.
 196 * API help is no longer displayed on errors.
 197 * 'uselang' is now a recognized API parameter; "uselang=user" may be used to
 198   explicitly select the language from the current user's preferences, and
 199   "uselang=content" may be used to select the wiki's content language.
 200 * Default output format for the API is now jsonfm.
 201 * Simplified continuation will return a "batchcomplete" property in the result
 202   when a batch of pages is complete.
 203 * Pretty-printed HTML output now has nicer formatting and (if available)
 204   better syntax highlighting.
 205 * Deprecated list=deletedrevs in favor of newly-added prop=deletedrevisions and
 206   list=alldeletedrevisions.
 207 * prop=revisions will gracefully continue when given too many revids or titles,
 208   rather than just ignoring the extras.
 209 * prop=revisions will no longer die if rvcontentformat doesn't match a
 210   revision's content model; it will instead warn and omit the content.
 211 * If the user has the 'deletedhistory' right, action=query's revids parameter
 212   will now recognize deleted revids.
 213 * prop=revisions may be used as a generator, generating revids.
 214 * (T68776) format=json results will no longer be corrupted when
 215   $wgMangleFlashPolicy is in effect. format=php results will cleanly return an
 216   error instead of returning invalid serialized data.
 217 * Generators may now return data for the generated pages when used with
 218   action=query.
 219 * Query page data for generator=search and generator=prefixsearch will now
 220   include an "index" field, which may be used by the client for sorting the
 221   search results.
 222 * ApiOpenSearch now supports XML output.
 223 * ApiOpenSearch will now output descriptions and URLs as array indexes 2 and 3
 224   in JSON format.
 225 * (T76051) list=tags will now continue correctly.
 226 * (T76052) list=tags can now indicate whether a tag is defined.
 227 * (T75522) list=prefixsearch now supports continuation
 228 * (T78737) action=expandtemplates can now return page properties.
 229 * (T78690) list=allimages now accepts multiple pipe-separated values
 230   for the 'aimime' parameter.
 231 * prop=info with inprop=protections will now return applicable protection types
 232   with the 'restrictiontypes' key.
 233 * (T85417) When resolving redirects, ApiPageSet will now add the targets of
 234   interwiki redirects to the list of interwiki titles.
 235 * (T85417) When outputting the list of redirect titles, a 'tointerwiki'
 236   property (like the existing 'tofragment' property) will be set.
 237 * Added action=managetags to allow for managing the list of
 238   user-modifiable change tags. Actually modifying the tagging of a revision or
 239   log entry is not implemented yet.
 240 * list=tags has additional properties to indicate 'active' status and tag
 241   sources.
 242 * siprop=libraries was added to ApiQuerySiteInfo to list installed external libraries.
 243 * (T88010) Added action=checktoken, to test a CSRF token's validity.
 244 * (T88010) Added intestactions to prop=info, to allow querying of
 245   Title::userCan() via the API.
 246 * Default type param for query list=watchlist and list=recentchanges has
 247   been changed from all types (e.g. including 'external') to 'edit|new|log'.
 248 * Added formatversion to format=json, still experimental.
 249
 250 === Action API internal changes in 1.25 ===
 251 * ApiHelp has been rewritten to support i18n and paginated HTML output.
 252   Most existing modules should continue working without changes, but should do
 253   the following:
 254   * Add an i18n message "apihelp-{$moduleName}-description" to replace getDescription().
 255   * Add i18n messages "apihelp-{$moduleName}-param-{$param}" for each parameter
 256     to replace getParamDescription(). If necessary, the settings array returned
 257     by getParams() can use the new ApiBase::PARAM_HELP_MSG key to override the
 258     message.
 259   * Implement getExamplesMessages() to replace getExamples().
 260 * Modules with submodules (like action=query) must have their submodules
 261   override ApiBase::getParent() to return the correct parent object.
 262 * The 'APIGetDescription' and 'APIGetParamDescription' hooks are deprecated,
 263   and will have no effect for modules using i18n messages. Use
 264   'APIGetDescriptionMessages' and 'APIGetParamDescriptionMessages' instead.
 265 * Api formatters will no longer be asked to display the help screen on errors.
 266 * ApiMain::getCredits() was removed. The credits are available in the
 267   'api-credits' i18n message.
 268 * ApiFormatBase has been changed to support i18n and syntax highlighting via
 269   extensions with the new 'ApiFormatHighlight' hook. Core syntax highlighting
 270   has been removed.
 271 * ApiFormatBase now always buffers. Output is done when
 272   ApiFormatBase::closePrinter is called.
 273 * Much of the logic in ApiQueryRevisions has been split into ApiQueryRevisionsBase.
 274 * The 'revids' parameter supplied by ApiPageSet will now count deleted
 275   revisions as "good" if the user has the 'deletedhistory' right. New methods
 276   ApiPageSet::getLiveRevisionIDs() and ApiPageSet::getDeletedRevisionIDs() are
 277   provided to access just the live or just the deleted revids.
 278 * Added ApiPageSet::setGeneratorData() and ApiPageSet::populateGeneratorData()
 279   to allow generators to include data in the action=query result.
 280 * New hooks 'ApiMain::moduleManager' and 'ApiQuery::moduleManager', can be
 281   used for conditional registration of API modules.
 282 * Added ApiBase::lacksSameOriginSecurity() to allow modules to easily check if
 283   the current request was sent with the 'callback' parameter (or any future
 284   method that breaks the same-origin policy).
 285 * Profiling methods in ApiBase are deprecated and no longer need to be called.
 286 * ApiResult was greatly overhauled. See inline documentation for details.
 287 * ApiResult will automatically convert objects to strings or arrays (depending
 288   on whether a __toString() method exists on the object), and will refuse to
 289   add unsupported value types.
 290   * An informal interface, ApiSerializable, exists to override the default
 291     object conversion.
 292 * ApiResult/ApiFormatBase "raw mode" is deprecated.
 293 * ApiFormatXml now assumes defaults and so on instead of throwing errors when
 294   metadata isn't set.
 295 * The following methods have been deprecated and may be removed in a future
 296   release:
 297   * ApiBase::getDescription
 298   * ApiBase::getParamDescription
 299   * ApiBase::getExamples
 300   * ApiBase::makeHelpMsg
 301   * ApiBase::makeHelpArrayToString
 302   * ApiBase::makeHelpMsgParameters
 303   * ApiBase::getModuleProfileName
 304   * ApiBase::profileIn
 305   * ApiBase::profileOut
 306   * ApiBase::safeProfileOut
 307   * ApiBase::getProfileTime
 308   * ApiBase::profileDBIn
 309   * ApiBase::profileDBOut
 310   * ApiBase::getProfileDBTime
 311   * ApiBase::getResultData
 312   * ApiFormatBase::setUnescapeAmps
 313   * ApiFormatBase::getWantsHelp
 314   * ApiFormatBase::setHelp
 315   * ApiFormatBase::formatHTML
 316   * ApiFormatBase::setBufferResult
 317   * ApiFormatBase::getDescription
 318   * ApiFormatBase::getNeedsRawData
 319   * ApiMain::setHelp
 320   * ApiMain::reallyMakeHelpMsg
 321   * ApiMain::makeHelpMsgHeader
 322   * ApiResult::setRawMode
 323   * ApiResult::getIsRawMode
 324   * ApiResult::getData
 325   * ApiResult::setElement
 326   * ApiResult::setContent
 327   * ApiResult::setIndexedTagName_recursive
 328   * ApiResult::setIndexedTagName_internal
 329   * ApiResult::setParsedLimit
 330   * ApiResult::beginContinuation
 331   * ApiResult::setContinueParam
 332   * ApiResult::setGeneratorContinueParam
 333   * ApiResult::endContinuation
 334   * ApiResult::size
 335   * ApiResult::convertStatusToArray
 336   * ApiQueryImageInfo::getPropertyDescriptions
 337 * The following classes have been deprecated and may be removed in a future
 338   release:
 339   * ApiQueryDeletedrevs
 340
 341 === Languages updated in 1.25 ===
 342
 343 MediaWiki supports over 350 languages. Many localisations are updated
 344 regularly. Below only new and removed languages are listed, as well as
 345 changes to languages because of Bugzilla reports.
 346
 347 * (T66440) Kazakh (kk) wikis should no longer forcefully reset the user's
 348   interface language to kk where unexpected.
 349 * The Chinese conversion table was substantially updated to fix a lot of
 350   bugs and ensure better reading experience for different variants.
 351
 352 === Other changes in 1.25 ===
 353 * The skin autodiscovery mechanism, deprecated in MediaWiki 1.23, has been
 354   removed. See https://www.mediawiki.org/wiki/Manual:Skin_autodiscovery for
 355   migration guide for creators and users of custom skins that relied on it.
 356 * Javascript variables 'wgFileCanRotate' and 'wgFileExtensions' now only
 357   available on Special:Upload.
 358 * (T58257) Set site logo from mediawiki.skinning.interface module instead of
 359   inline styles in the HTML.
 360 * Removed ApiQueryUsers::getAutoGroups(). (deprecated since 1.20)
 361 * Removed XmlDumpWriter::schemaVersion(). (deprecated since 1.20)
 362 * Removed LogEventsList::getDisplayTitle(). (deprecated since 1.20)
 363 * Removed Preferences::trySetUserEmail(). (deprecated since 1.20)
 364 * Removed mw.user.name() and mw.user.anonymous() methods. (deprecated since 1.20)
 365 * Removed 'ok' and 'err' parameters in the mediawiki.api modules. (deprecated
 366   since 1.20)
 367 * Removed 'async' parameter from the  mw.Api#getCategories() method. (deprecated
 368   since 1.20)
 369 * Removed 'jquery.json' module. (deprecated since 1.24)
 370   Use the 'json' module and global JSON object instead.
 371 * Deprecated OutputPage::readOnlyPage() and OutputPage::rateLimited().
 372   Also, the former will now throw an MWException if called with one or more
 373   arguments.
 374 * Removed hitcounters and associated code.
 375 * The "temp" zone of the upload respository is now considered private. If it
 376   already exists (such as under the images/ directory), please make sure that
 377   the directory is not web readable (e.g. via a .htaccess file).
 378 * BREAKING CHANGE: In the XML dump format used by Special:Export and
 379   dumpBackup.php, the <model> and <format> tags now apprear before the <text>
 380   tag, instead of after the <text> and <sha1> tags.
 381   The new schema version is 0.10, the new schema URI is:
 382   https://www.mediawiki.org/xml/export-0.10.xsd
 383 * MWFunction::call() and MWFunction::callArray() were removed, having being
 384   deprecated in 1.22.
 385 * Deprecated the getInternalLinkAttributes, getInternalLinkAttributesObj,
 386   and getInternalLinkAttributes methods in Linker, and removed
 387   getExternalLinkAttributes method, which was deprecated in MediaWiki 1.18.
 388 * Removed Sites class, which was deprecated in 1.21 and replaced by SiteSQLStore.
 389 * The mw.api.getToken() method now uses action=query?meta=tokens. This will now
 390   fail for custom tokens registered only via the deprecated ApiTokensGetTokenTypes
 391   hook. The ApiQueryTokensRegisterTypes hook should be used for this to work.
 392 * Added wgRelevantArticleId to the client-side config, for use on special pages.
 393 * Deprecated the TitleIsCssOrJsPage hook. Superseded by the
 394   ContentHandlerDefaultModelFor hook since MediaWiki 1.21.
 395 * Deprecated the TitleIsWikitextPage hook. Superseded by the
 396   ContentHandlerDefaultModelFor hook since MediaWiki 1.21.
 397 * Changed parsing of variables in schema (.sql) files:
 398 ** The substituted values are no longer parsed. (Formerly, several passes
 399    were made for each variable, so depending on the order in which variables
 400    were defined, variables might have been found inside encoded values. This
 401    is no longer the case.)
 402 ** Variables are no longer string encoded when the /*$var*/ syntax is used.
 403    If string encoding is necessary, use the '{$var}' syntax instead.
 404 ** Variable names must only consist of one or more of the characters
 405    "A-Za-z0-9_".
 406 ** In source text of the form '{$A}'{$B}' or `{$A}`{$B}`, where variable A
 407    does not exist yet variable B does, the latter may not be replaced.
 408    However, this difference is unlikely to arise in practice.
 409 * (T67278) RFC, PMID, and ISBN "magic links" must be surrounded by non-word
 410   characters on both sides.
 411 * The FormatAutocomments hook will now receive $pre and $post as booleans,
 412   rather than as strings that must be prepended or appended to $comment.
 413 * (T30950, T31025) RFC, PMID, and ISBN "magic links" can no longer contain
 414   newlines; but they can contain &nbsp; and other non-newline whitespace.
 415 * The 'mediawiki.action.edit' ResourceLoader module no longer generates the edit
 416   toolbar, which has been moved to a separate 'mediawiki.toolbar' module. If you
 417   relied on this behavior, update your scripts' dependencies.
 418 * HTMLForm's 'vform' display style has been separated to a subclass. Therefore:
 419   * HTMLForm::isVForm() is now deprecated.
 420   * You can no longer do this:
 421       $form = new HTMLForm( … );
 422       $form->setDisplayFormat( 'vform' ); // throws exception
 423     Instead, do this:
 424       $form = HTMLForm::factory( 'vform', … );
 425 * Deprecated Revision methods getRawUser(), getRawUserText() and getRawComment().
 426 * BREAKING CHANGE: mediawiki.user.generateRandomSessionId:
 427   The alphabet of the prior string returned was A-Za-z0-9 and now it is 0-9A-F
 428 * (T87504) Avoid serving SVG background-images in CSS for Opera 12, which
 429   renders them incorrectly when combined with border-radius or background-size.
 430 * Removed maintenance script dumpSisterSites.php.
 431 * DatabaseBase class constructors must be called using the array argument style.
 432   Ideally, DatabaseBase:factory() should be used instead in most cases.
 433 * Deprecated ParserOutput::addSecondaryDataUpdate and ParserOutput::getSecondaryDataUpdates.
 434   This is a hard deprecation, with getSecondaryDataUpdates returning an empty array and
 435   addSecondaryDataUpdate throwing an exception. These functions will be removed in 1.26,
 436   since they interfere with caching of ParserOutput objects.
 437 * Introduced new hook 'SecondaryDataUpdates' that allows extensions to inject custom updates.
 438 * Introduced new hook 'OpportunisticLinksUpdate' that allows extensions to perform
 439   updates when a page is re-rendered.
 440 * EditPage::attemptSave has been modified not to call handleStatus itself and
 441   instead just returns the Status object. Extension calling it should be aware of
 442   this.
 443 * Removed class DBObject. (unused since 1.10)
 444 * wfDiff() is deprecated.
 445 * The -m (maximum replication lag) option of refreshLinks.php was removed.
 446   It had no effect since MediaWiki 1.18 and should be removed from any cron
 447   jobs or similar scripts you may have set up.
 448 * (T85864) The following messages no longer support raw html: redirectto,
 449   thisisdeleted, viewdeleted, editlink, retrievedfrom, version-poweredby-others,
 450   retrievedfrom, thisisdeleted, viewsourcelink, lastmodifiedat, laggedslavemode,
 451   protect-summary-cascade
 452 * All BloomCache related code has been removed. This was largely experimental.
 453
 454 == Compatibility ==
 455
 456 MediaWiki 1.25 requires PHP 5.3.3 or later. There is experimental support for
 457 HHVM 3.3.0.
 458
 459 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
 460 support for them is somewhat less mature. There is experimental support for
 461 Oracle and Microsoft SQL Server.
 462
 463 The supported versions are:
 464
 465 * MySQL 5.0.3 or later
 466 * PostgreSQL 8.3 or later
 467 * SQLite 3.3.7 or later
 468 * Oracle 9.0.1 or later
 469 * Microsoft SQL Server 2005 (9.00.1399)
 470
 471 == Upgrading ==
 472
 473 1.25 has several database changes since 1.24, and will not work without schema
 474 updates. Note that due to changes to some very large tables like the revision
 475 table, the schema update may take quite long (minutes on a medium sized site,
 476 many hours on a large site).
 477
 478 If upgrading from before 1.11, and you are using a wiki as a commons
 479 repository, make sure that it is updated as well. Otherwise, errors may arise
 480 due to database schema changes.
 481
 482 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
 483 new database fields are filled with data.
 484
 485 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
 486 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
 487 with MediaWiki 1.21.
 488
 489 Don't forget to always back up your database before upgrading!
 490
 491 See the file UPGRADE for more detailed upgrade instructions.
 492
 493 For notes on 1.24.x and older releases, see HISTORY.
 494
 495 == Online documentation ==
 496
 497 Documentation for both end-users and site administrators is available on
 498 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 499 for pages that explicitly state that their contents are in the public domain):
 500
 501         https://www.mediawiki.org/wiki/Documentation
 502
 503 == Mailing list ==
 504
 505 A mailing list is available for MediaWiki user support and discussion:
 506
 507         https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 508
 509 A low-traffic announcements-only list is also available:
 510
 511         https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 512
 513 It's highly recommended that you sign up for one of these lists if you're
 514 going to run a public MediaWiki, so you can be notified of security fixes.
 515
 516 == IRC help ==
 517
 518 There's usually someone online in #mediawiki on irc.freenode.net.