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 $wgJobTypeConf for any redis
  46   job queues. This means that mediawiki/services/jobrunner service has to
  47   be installed and running for any such queues to work.
  48
  49 === New features in 1.25 ===
  50 * (T64861) Updated plural rules to CLDR 26. Includes incompatible changes
  51   for plural forms in Russian, Prussian, Tagalog, Manx and several languages
  52   that fall back to Russian.
  53 * (T60139) ResourceLoaderFileModule now supports language fallback
  54   for 'languageScripts'.
  55 * Added a new hook, "ContentAlterParserOutput", to allow extensions to modify the
  56   parser output for a content object before links update.
  57 * (T37785) Enhanced recent changes and extended watchlist are now default.
  58   Documentation: https://meta.wikimedia.org/wiki/Help:Enhanced_recent_changes
  59   and https://www.mediawiki.org/wiki/Manual:$wgDefaultUserOptions.
  60 * (T69341) SVG images will no longer be base64-encoded when being embedded
  61   in CSS. This results in slight size increase before gzip compression (due to
  62   percent-encoding), but up to 20% decrease after it.
  63 * Update jStorage to v0.4.12.
  64 * MediaWiki now natively supports page status indicators: icons (or short text
  65   snippets) usually displayed in the top-right corner of the page. They have
  66   been in use on Wikipedia for a long time, implemented using templates and CSS
  67   absolute positioning.
  68   - Basic wikitext syntax: <indicator name="foo">[[File:Foo.svg|20px]]</indicator>
  69   - Usage instructions: https://www.mediawiki.org/wiki/Help:Page_status_indicators
  70   - Adjusting custom skins to support indicators:
  71     https://www.mediawiki.org/wiki/Manual:Skinning#Page_status_indicators
  72 * Edit tokens may now be time-limited: passing a maximum age to
  73   User::matchEditToken will reject any older tokens.
  74 * The debug logging internals have been overhauled, and are now using the
  75   PSR-3 interfaces.
  76 * Update CSSJanus to v1.1.1.
  77 * Update lessphp to v0.5.0.
  78 * Added a hook, "ApiOpenSearchSuggest", to allow extensions to provide extracts
  79   and images for ApiOpenSearch output. The semantics are identical to the
  80   "OpenSearchXml" hook provided by the OpenSearchXml extension.
  81 * PrefixSearchBackend hook now has an $offset parameter. Combined with $limit,
  82   this allows for pagination of prefix results. Extensions using this hook
  83   should implement supporting behavior. Not doing so can result in undefined
  84   behavior from API clients trying to continue through prefix results.
  85 * Update jQuery from v1.11.1 to v1.11.2.
  86 * External libraries installed via composer will now be displayed
  87   on Special:Version in their own section. Extensions or skins that are
  88   installed via composer will not be shown in this section as it is assumed
  89   they will add the proper credits to the skins or extensions section. They
  90   can also be accessed through the API via the new siprop=libraries to
  91   ApiQuerySiteInfo.
  92 * Update QUnit from v1.14.0 to v1.16.0.
  93 * Update Moment.js from v2.8.3 to v2.8.4.
  94 * Special:Tags now allows for manipulating the list of user-modifiable change
  95   tags. Actually modifying the tagging of a revision or log entry is not
  96   implemented yet.
  97 * Added 'managetags' user right and 'ChangeTagCanCreate', 'ChangeTagCanDelete',
  98   and 'ChangeTagCanCreate' hooks to allow for managing user-modifiable change
  99   tags.
 100 * Added 'ChangeTagsListActive' hook, to separate the concepts of "defined" and
 101   "active" formerly conflated by the 'ListDefinedTags' hook.
 102 * Added TemplateParser class that provides a server-side interface to cachable
 103   dynamically-compiled Mustache templates (currently uses lightncandy library).
 104 * Clickable anchors for each section heading in the content are now generated
 105   and appear in the gutter on hovering over the heading.
 106 * Added 'CategoryViewer::doCategoryQuery' and 'CategoryViewer::generateLink' hooks
 107   to allow extensions to override how links to pages are rendered within NS_CATEGORY
 108 * (T19665) Special:WantedPages only lists page which having at least one red link
 109   pointing to it.
 110 * New hooks 'ApiMain::moduleManager' and 'ApiQuery::moduleManager', can be
 111   used for conditional registration of API modules.
 112 * New hook 'EnhancedChangesList::getLogText' to alter, remove or add to the
 113   links of a group of changes in EnhancedChangesList.
 114 * A full interface for StatsD metric reporting has been added to the context
 115   interface, reachable via IContextSource::getStats().
 116 * Move the jQuery Client library from being mastered in MediaWiki as v0.1.0 to a
 117   proper, published library, which is now tagged as v1.0.0.
 118
 119 ==== External libraries ====
 120 * MediaWiki now requires certain external libraries to be installed. In the past
 121   these were bundled inside the Git repository of MediaWiki core, but now they
 122   need to be installed separately. For users using the tarball, this will be taken
 123   care of and no action will be required. Users using Git will either need to use
 124   composer to fetch dependencies or use the mediawiki/vendor repository which includes
 125   all dependencies for MediaWiki core and ones used in Wikimedia deployment. Detailed
 126   instructions can be found at:
 127   https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries
 128 * The following libraries are now required:
 129 ** psr/log
 130    This library provides the interfaces set by the PSR-3 standard (http://www.php-fig.org/psr/psr-3/)
 131    which are used by MediaWiki internally via the MWLoggerFactory class.
 132    See the structured logging RfC (https://www.mediawiki.org/wiki/Requests_for_comment/Structured_logging)
 133    for more background information.
 134 ** cssjanus/cssjanus
 135    This library was formerly bundled with MediaWiki core and has been removed.
 136    It automatically flips CSS for RTL support.
 137 ** leafo/lessphp
 138    This library was formerly bundled with MediaWiki core and has been removed.
 139    It compiles LESS files into CSS.
 140 ** wikimedia/cdb
 141    This library was formerly a part of MediaWiki core, and has been moved into a separate library.
 142    It provides CDB functions which are used in the Interwiki and Localization caches.
 143    More information about the library can be found at https://www.mediawiki.org/wiki/CDB.
 144 ** liuggio/statsd-php-client
 145    This library provides a StatsD client API for logging application metrics to a remote server.
 146
 147 === Bug fixes in 1.25 ===
 148 * (T73003) No additional code will be generated to try to load CSS-embedded
 149   SVG images in Internet Explorer 6 and 7, as they don't support them anyway.
 150 * (T69021) On Special:BookSources, corrected validation of ISBNs (both
 151   10- and 13-digit forms) containing "X".
 152 * Page moving was refactored into a MovePage class. As part of that:
 153 ** The AbortMove hook was removed.
 154 ** MovePageIsValidMove is for extensions to specify whether a page
 155    cannot be moved for technical reasons, and should not be overridden.
 156 ** MovePageCheckPermissions is for checking whether the given user is
 157    allowed to make the move.
 158 ** Title::moveNoAuth() was deprecated. Use the MovePage class instead.
 159 ** Title::moveTo() was deprecated. Use the MovePage class instead.
 160 ** Title::isValidMoveOperation() broken down into MovePage::isValidMove()
 161    and MovePage::checkPermissions().
 162 * (T18530) Multiple autocomments are now formatted in an edit summary.
 163 * (T70361) Autocomments containing "/*" are parsed correctly.
 164 * The Special:WhatLinksHere page linked from 'Number of redirects to this page'
 165   on action=info about a file page does not list file links anymore.
 166 * (T78637) Search bar is not autofocused unless it is empty so that proper scrolling using arrow keys is possible.
 167 * (T50853) Database::makeList() modified to handle 'NULL' separately when building IN clause
 168 * (T85192) Captcha position modified in Usercreate template. As a result:
 169 ** extrafields parameter added to Usercreate.php to insert additional data
 170 ** 'extend' method added to QuickTemplate to append additional values to any field of data array
 171 * (T86974) Several Title methods now load from the database when necessary
 172   (instead of returning incorrect results) even when the page ID is known.
 173 * (T74070) Duplicate search for archived files on file upload now omits the extension.
 174   This requires the fa_sha1 field being populated.
 175 * Removed rel="archives" from the "View history" link, as it did not pass
 176   HTML validation.
 177
 178 === Action API changes in 1.25 ===
 179 * (T67403) XML tag highlighting is now only performed for formats
 180   "xmlfm" and "wddxfm".
 181 * action=paraminfo supports generalized submodules (modules=query+value),
 182   querymodules and formatmodules are deprecated
 183 * action=paraminfo no longer outputs descriptions and other help text by
 184   default. If needed, it may be requested using the new 'helpformat' parameter.
 185 * action=help has been completely rewritten, and outputs help in HTML
 186   rather than plain text.
 187 * Hitting api.php without specifying an action now displays only the help for
 188   the main module, with links to submodule help.
 189 * API help is no longer displayed on errors.
 190 * 'uselang' is now a recognized API parameter; "uselang=user" may be used to
 191   explicitly select the language from the current user's preferences, and
 192   "uselang=content" may be used to select the wiki's content language.
 193 * Default output format for the API is now jsonfm.
 194 * Simplified continuation will return a "batchcomplete" property in the result
 195   when a batch of pages is complete.
 196 * Pretty-printed HTML output now has nicer formatting and (if available)
 197   better syntax highlighting.
 198 * Deprecated list=deletedrevs in favor of newly-added prop=deletedrevisions and
 199   list=alldeletedrevisions.
 200 * prop=revisions will gracefully continue when given too many revids or titles,
 201   rather than just ignoring the extras.
 202 * prop=revisions will no longer die if rvcontentformat doesn't match a
 203   revision's content model; it will instead warn and omit the content.
 204 * If the user has the 'deletedhistory' right, action=query's revids parameter
 205   will now recognize deleted revids.
 206 * prop=revisions may be used as a generator, generating revids.
 207 * (T68776) format=json results will no longer be corrupted when
 208   $wgMangleFlashPolicy is in effect. format=php results will cleanly return an
 209   error instead of returning invalid serialized data.
 210 * Generators may now return data for the generated pages when used with
 211   action=query.
 212 * Query page data for generator=search and generator=prefixsearch will now
 213   include an "index" field, which may be used by the client for sorting the
 214   search results.
 215 * ApiOpenSearch now supports XML output.
 216 * ApiOpenSearch will now output descriptions and URLs as array indexes 2 and 3
 217   in JSON format.
 218 * (T76051) list=tags will now continue correctly.
 219 * (T76052) list=tags can now indicate whether a tag is defined.
 220 * (T75522) list=prefixsearch now supports continuation
 221 * (T78737) action=expandtemplates can now return page properties.
 222 * (T78690) list=allimages now accepts multiple pipe-separated values
 223   for the 'aimime' parameter.
 224 * prop=info with inprop=protections will now return applicable protection types
 225   with the 'restrictiontypes' key.
 226 * (T85417) When resolving redirects, ApiPageSet will now add the targets of
 227   interwiki redirects to the list of interwiki titles.
 228 * (T85417) When outputting the list of redirect titles, a 'tointerwiki'
 229   property (like the existing 'tofragment' property) will be set.
 230 * Added action=managetags to allow for managing the list of
 231   user-modifiable change tags. Actually modifying the tagging of a revision or
 232   log entry is not implemented yet.
 233 * list=tags has additional properties to indicate 'active' status and tag
 234   sources.
 235 * siprop=libraries was added to ApiQuerySiteInfo to list installed external libraries.
 236 * (T88010) Added action=checktoken, to test a CSRF token's validity.
 237 * (T88010) Added intestactions to prop=info, to allow querying of
 238   Title::userCan() via the API.
 239 * Default type param for query list=watchlist and list=recentchanges has
 240   been changed from all types (e.g. including 'external') to 'edit|new|log'.
 241
 242 === Action API internal changes in 1.25 ===
 243 * ApiHelp has been rewritten to support i18n and paginated HTML output.
 244   Most existing modules should continue working without changes, but should do
 245   the following:
 246   * Add an i18n message "apihelp-{$moduleName}-description" to replace getDescription().
 247   * Add i18n messages "apihelp-{$moduleName}-param-{$param}" for each parameter
 248     to replace getParamDescription(). If necessary, the settings array returned
 249     by getParams() can use the new ApiBase::PARAM_HELP_MSG key to override the
 250     message.
 251   * Implement getExamplesMessages() to replace getExamples().
 252 * Modules with submodules (like action=query) must have their submodules
 253   override ApiBase::getParent() to return the correct parent object.
 254 * The 'APIGetDescription' and 'APIGetParamDescription' hooks are deprecated,
 255   and will have no effect for modules using i18n messages. Use
 256   'APIGetDescriptionMessages' and 'APIGetParamDescriptionMessages' instead.
 257 * Api formatters will no longer be asked to display the help screen on errors.
 258 * ApiMain::getCredits() was removed. The credits are available in the
 259   'api-credits' i18n message.
 260 * ApiFormatBase has been changed to support i18n and syntax highlighting via
 261   extensions with the new 'ApiFormatHighlight' hook. Core syntax highlighting
 262   has been removed.
 263 * ApiFormatBase now always buffers. Output is done when
 264   ApiFormatBase::closePrinter is called.
 265 * Much of the logic in ApiQueryRevisions has been split into ApiQueryRevisionsBase.
 266 * The 'revids' parameter supplied by ApiPageSet will now count deleted
 267   revisions as "good" if the user has the 'deletedhistory' right. New methods
 268   ApiPageSet::getLiveRevisionIDs() and ApiPageSet::getDeletedRevisionIDs() are
 269   provided to access just the live or just the deleted revids.
 270 * Added ApiPageSet::setGeneratorData() and ApiPageSet::populateGeneratorData()
 271   to allow generators to include data in the action=query result.
 272 * New hooks 'ApiMain::moduleManager' and 'ApiQuery::moduleManager', can be
 273   used for conditional registration of API modules.
 274 * Added ApiBase::lacksSameOriginSecurity() to allow modules to easily check if
 275   the current request was sent with the 'callback' parameter (or any future
 276   method that breaks the same-origin policy).
 277 * Profiling methods in ApiBase are deprecated and no longer need to be called.
 278 * The following methods have been deprecated and may be removed in a future
 279   release:
 280   * ApiBase::getDescription
 281   * ApiBase::getParamDescription
 282   * ApiBase::getExamples
 283   * ApiBase::makeHelpMsg
 284   * ApiBase::makeHelpArrayToString
 285   * ApiBase::makeHelpMsgParameters
 286   * ApiBase::getModuleProfileName
 287   * ApiBase::profileIn
 288   * ApiBase::profileOut
 289   * ApiBase::safeProfileOut
 290   * ApiBase::getProfileTime
 291   * ApiBase::profileDBIn
 292   * ApiBase::profileDBOut
 293   * ApiBase::getProfileDBTime
 294   * ApiFormatBase::setUnescapeAmps
 295   * ApiFormatBase::getWantsHelp
 296   * ApiFormatBase::setHelp
 297   * ApiFormatBase::formatHTML
 298   * ApiFormatBase::setBufferResult
 299   * ApiFormatBase::getDescription
 300   * ApiMain::setHelp
 301   * ApiMain::reallyMakeHelpMsg
 302   * ApiMain::makeHelpMsgHeader
 303   * ApiQueryImageInfo::getPropertyDescriptions
 304 * The following classes have been deprecated and may be removed in a future
 305   release:
 306   * ApiQueryDeletedrevs
 307
 308 === Languages updated in 1.25 ===
 309
 310 MediaWiki supports over 350 languages. Many localisations are updated
 311 regularly. Below only new and removed languages are listed, as well as
 312 changes to languages because of Bugzilla reports.
 313
 314 * (T66440) Kazakh (kk) wikis should no longer forcefully reset the user's
 315   interface language to kk where unexpected.
 316 * The Chinese conversion table was substantially updated to fix a lot of
 317   bugs and ensure better reading experience for different variants.
 318
 319 === Other changes in 1.25 ===
 320 * The skin autodiscovery mechanism, deprecated in MediaWiki 1.23, has been
 321   removed. See https://www.mediawiki.org/wiki/Manual:Skin_autodiscovery for
 322   migration guide for creators and users of custom skins that relied on it.
 323 * Javascript variables 'wgFileCanRotate' and 'wgFileExtensions' now only
 324   available on Special:Upload.
 325 * (T58257) Set site logo from mediawiki.skinning.interface module instead of
 326   inline styles in the HTML.
 327 * Removed ApiQueryUsers::getAutoGroups(). (deprecated since 1.20)
 328 * Removed XmlDumpWriter::schemaVersion(). (deprecated since 1.20)
 329 * Removed LogEventsList::getDisplayTitle(). (deprecated since 1.20)
 330 * Removed Preferences::trySetUserEmail(). (deprecated since 1.20)
 331 * Removed mw.user.name() and mw.user.anonymous() methods. (deprecated since 1.20)
 332 * Removed 'ok' and 'err' parameters in the mediawiki.api modules. (deprecated
 333   since 1.20)
 334 * Removed 'async' parameter from the  mw.Api#getCategories() method. (deprecated
 335   since 1.20)
 336 * Removed 'jquery.json' module. (deprecated since 1.24)
 337   Use the 'json' module and global JSON object instead.
 338 * Deprecated OutputPage::readOnlyPage() and OutputPage::rateLimited().
 339   Also, the former will now throw an MWException if called with one or more
 340   arguments.
 341 * Removed hitcounters and associated code.
 342 * The "temp" zone of the upload respository is now considered private. If it
 343   already exists (such as under the images/ directory), please make sure that
 344   the directory is not web readable (e.g. via a .htaccess file).
 345 * BREAKING CHANGE: In the XML dump format used by Special:Export and
 346   dumpBackup.php, the <model> and <format> tags now apprear before the <text>
 347   tag, instead of after the <text> and <sha1> tags.
 348   The new schema version is 0.10, the new schema URI is:
 349   https://www.mediawiki.org/xml/export-0.10.xsd
 350 * MWFunction::call() and MWFunction::callArray() were removed, having being
 351   deprecated in 1.22.
 352 * Deprecated the getInternalLinkAttributes, getInternalLinkAttributesObj,
 353   and getInternalLinkAttributes methods in Linker, and removed
 354   getExternalLinkAttributes method, which was deprecated in MediaWiki 1.18.
 355 * Removed Sites class, which was deprecated in 1.21 and replaced by SiteSQLStore.
 356 * The mw.api.getToken() method now uses action=query?meta=tokens. This will now
 357   fail for custom tokens registered only via the deprecated ApiTokensGetTokenTypes
 358   hook. The ApiQueryTokensRegisterTypes hook should be used for this to work.
 359 * Added wgRelevantArticleId to the client-side config, for use on special pages.
 360 * Deprecated the TitleIsCssOrJsPage hook. Superseded by the
 361   ContentHandlerDefaultModelFor hook since MediaWiki 1.21.
 362 * Deprecated the TitleIsWikitextPage hook. Superseded by the
 363   ContentHandlerDefaultModelFor hook since MediaWiki 1.21.
 364 * Changed parsing of variables in schema (.sql) files:
 365 ** The substituted values are no longer parsed. (Formerly, several passes
 366    were made for each variable, so depending on the order in which variables
 367    were defined, variables might have been found inside encoded values. This
 368    is no longer the case.)
 369 ** Variables are no longer string encoded when the /*$var*/ syntax is used.
 370    If string encoding is necessary, use the '{$var}' syntax instead.
 371 ** Variable names must only consist of one or more of the characters
 372    "A-Za-z0-9_".
 373 ** In source text of the form '{$A}'{$B}' or `{$A}`{$B}`, where variable A
 374    does not exist yet variable B does, the latter may not be replaced.
 375    However, this difference is unlikely to arise in practice.
 376 * (T67278) RFC, PMID, and ISBN "magic links" must be surrounded by non-word
 377   characters on both sides.
 378 * The FormatAutocomments hook will now receive $pre and $post as booleans,
 379   rather than as strings that must be prepended or appended to $comment.
 380 * (T30950, T31025) RFC, PMID, and ISBN "magic links" can no longer contain
 381   newlines; but they can contain &nbsp; and other non-newline whitespace.
 382 * The 'mediawiki.action.edit' ResourceLoader module no longer generates the edit
 383   toolbar, which has been moved to a separate 'mediawiki.toolbar' module. If you
 384   relied on this behavior, update your scripts' dependencies.
 385 * HTMLForm's 'vform' display style has been separated to a subclass. Therefore:
 386   * HTMLForm::isVForm() is now deprecated.
 387   * You can no longer do this:
 388       $form = new HTMLForm( … );
 389       $form->setDisplayFormat( 'vform' ); // throws exception
 390     Instead, do this:
 391       $form = HTMLForm::factory( 'vform', … );
 392 * Deprecated Revision methods getRawUser(), getRawUserText() and getRawComment().
 393 * BREAKING CHANGE: mediawiki.user.generateRandomSessionId:
 394   The alphabet of the prior string returned was A-Za-z0-9 and now it is 0-9A-F
 395 * (T87504) Avoid serving SVG background-images in CSS for Opera 12, which
 396   renders them incorrectly when combined with border-radius or background-size.
 397 * Removed maintenance script dumpSisterSites.php.
 398 * DatabaseBase class constructors must be called using the array argument style.
 399   Ideally, DatabaseBase:factory() should be used instead in most cases.
 400 * Deprecated ParserOutput::addSecondaryDataUpdate and ParserOutput::getSecondaryDataUpdates.
 401   This is a hard deprecation, with getSecondaryDataUpdates returning an empty array and
 402   addSecondaryDataUpdate throwing an exception. These functions will be removed in 1.26,
 403   since they interfere with caching of ParserOutput objects.
 404 * Introduced new hook 'SecondaryDataUpdates' that allows extensions to inject custom updates.
 405 * EditPage::attemptSave has been modified not to call handleStatus itself and
 406   instead just returns the Status object. Extension calling it should be aware of
 407   this.
 408
 409 == Compatibility ==
 410
 411 MediaWiki 1.25 requires PHP 5.3.3 or later. There is experimental support for
 412 HHVM 3.3.0.
 413
 414 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
 415 support for them is somewhat less mature. There is experimental support for
 416 Oracle and Microsoft SQL Server.
 417
 418 The supported versions are:
 419
 420 * MySQL 5.0.2 or later
 421 * PostgreSQL 8.3 or later
 422 * SQLite 3.3.7 or later
 423 * Oracle 9.0.1 or later
 424 * Microsoft SQL Server 2005 (9.00.1399)
 425
 426 == Upgrading ==
 427
 428 1.25 has several database changes since 1.24, and will not work without schema
 429 updates. Note that due to changes to some very large tables like the revision
 430 table, the schema update may take quite long (minutes on a medium sized site,
 431 many hours on a large site).
 432
 433 If upgrading from before 1.11, and you are using a wiki as a commons
 434 repository, make sure that it is updated as well. Otherwise, errors may arise
 435 due to database schema changes.
 436
 437 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
 438 new database fields are filled with data.
 439
 440 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
 441 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
 442 with MediaWiki 1.21.
 443
 444 Don't forget to always back up your database before upgrading!
 445
 446 See the file UPGRADE for more detailed upgrade instructions.
 447
 448 For notes on 1.24.x and older releases, see HISTORY.
 449
 450 == Online documentation ==
 451
 452 Documentation for both end-users and site administrators is available on
 453 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 454 for pages that explicitly state that their contents are in the public domain):
 455
 456         https://www.mediawiki.org/wiki/Documentation
 457
 458 == Mailing list ==
 459
 460 A mailing list is available for MediaWiki user support and discussion:
 461
 462         https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 463
 464 A low-traffic announcements-only list is also available:
 465
 466         https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 467
 468 It's highly recommended that you sign up for one of these lists if you're
 469 going to run a public MediaWiki, so you can be notified of security fixes.
 470
 471 == IRC help ==
 472
 473 There's usually someone online in #mediawiki on irc.freenode.net.