RELEASE-NOTES-1.23

   1 Security reminder: MediaWiki does not require PHP's register_globals. If you
   2 have it on, turn it '''off''' if you can.
   3
   4 == MediaWiki 1.23 ==
   5
   6 THIS IS NOT A RELEASE YET
   7
   8 MediaWiki 1.23 is an alpha-quality branch and is not recommended for use in
   9 production.
  10
  11 === Configuration changes in 1.23 ===
  12 * Introduced $wgPagePropsHaveSortkey as a backwards-compatibility switch,
  13   for using the old schema of the page_props table, in case the respective
  14   schema update was not applied.
  15 * When $wgJobRunRate is higher that zero, jobs are now executed via an
  16   asynchronous HTTP request to a MediaWiki entry point. This may require
  17   increasing the number of server worker threads. $wgRunJobsAsync has been
  18   added to disable this feature if needed, falling back to executing the job
  19   on the same process but making the execution synchronously.
  20 * $wgDebugLogGroups values may be set to an associative array with a
  21   'destination' key specifying the log destination. The array may also contain
  22   a 'sample' key with a positive integer value N indicating that the log group
  23   should be sampled by dispatching one in every N messages on average. The
  24   sampling is random.
  25 * In addition to the current exception log format, MediaWiki now serializes
  26   exception metadata to JSON and logs it to the 'exception-json' log group.
  27   This makes MediaWiki easier to integrate with log aggregation and analysis
  28   tools.
  29 * $wgSquidServersNoPurge now supports the use of Classless Inter-Domain
  30   Routing (CIDR) notation to specify contiguous blocks of IPv4 and/or IPv6
  31   addresses that should be trusted to provide X-Forwarded-For headers.
  32 * Preferences 'watchcreations', 'watchdefault', 'enotifwatchlistpages' ("Add
  33   pages I create and files I upload to my watchlist", "Add pages and files I
  34   edit to my watchlist", "Email me when a page or file on my watchlist is
  35   changed") are now enabled by default. In addition new user accounts' personal
  36   and talk pages are now watched by them by default.
  37 * $wgLBFactoryConf: Class names have had underscores removed. The configuration
  38   should be updated if LBFactory_Simple or LBFactory_Multi is configured.
  39 * $wgPasswordSenderName has been removed and is no longer functional. To set a
  40   custom mailer name, the system message 'emailsender' should be modified
  41   (default: "{{SITENAME}}").
  42 * If you customized [[MediaWiki:Enotif body]] (the text of email notifications),
  43   you'll need to edit it locally to include the URL via the new variable
  44   $HELPPAGE instead of the parser functions fullurl and canonicalurl.
  45 * $wgDBAhandler was removed as the only class using it was also removed
  46 * The 'max threads' setting was removed from $wgDBservers.
  47 * Support for AdminSettings.php has been completely removed. All configuration
  48   belongs in LocalSettings.php.
  49 * $wgSkipSkin, which has been replaceable by $wgSkipSkins since 2005 (r9249), is
  50   now formally deprecated.
  51 * Removed deprecated $wgDisabledActions as it is hardly used anywhere.
  52 * $wgRateLimitLog has been deprecated and replaced by
  53   $wgDebugLogGroup['ratelimit'].
  54 * $wgLocalInterwikis is an array containing multiple local interwiki prefixes
  55   (interwiki prefixes that point back to the current wiki). This effectively
  56   allows more than one value of $wgLocalInterwiki to be specified and
  57   understood by the parser. The value of $wgLocalInterwiki is automatically
  58   prepended to the start of this array.
  59 * $wgQueryPages has been removed. Query Pages should be added to by using the
  60   wgQueryPages hook.
  61 * $wgHttpOnlyBlacklist has been removed.
  62 * $wgLicenseTerms has been removed as it was unused.
  63 * $wgProfileOnly is now deprecated; set the log file in
  64   $wgDebugLogGroups['profileoutput'] to replace it.
  65 * $wgMaxBacklinksInvalidate was removed; use $wgJobBackoffThrottling instead
  66 * Deprecated ResourceLoaderGetStartupModules hook.
  67
  68 === New features in 1.23 ===
  69 * ResourceLoader can utilize the Web Storage API to cache modules client-side.
  70   Compared to the browser cache, caching in Web Storage allows ResourceLoader
  71   to be more granular about evicting stale modules from the cache while
  72   retaining the ability to retrieve multiple modules in a single HTTP request.
  73   This capability can be enabled by setting $wgResourceLoaderStorageEnabled to
  74   true. This feature is currently considered experimental and should only be
  75   enabled with care.
  76 * (bug 6092) Add expensive parser functions {{REVISIONID:}}, {{REVISIONUSER:}}
  77   and {{REVISIONTIMESTAMP:}} (with friends).
  78 * Add "wgRelevantUserName" to mw.config containing the current
  79   Skin::getRelevantUser value.
  80 * (bug 56033) Add content model to the page information.
  81 * Added Article::MissingArticleConditions hook to give extensions a chance to
  82   hide their (unrelated) log entries.
  83 * Added LonelyPagesQuery hook to let extensions modify the query used to
  84   generate Special:LonelyPages.
  85 * Added $wgOpenSearchDefaultLimit defining the default number of entries to show
  86   on action=opensearch API call.
  87 * For namespaces with $wgNamespaceProtection (including the MediaWiki
  88   namespace), the "protect" tab will be shown only if there are restriction
  89   levels available that would restrict editing beyond what
  90   $wgNamespaceProtection already applies. The protection form will offer only
  91   those protection levels.
  92 * Added $wgAPIFormatModules, allowing extensions to add additional output
  93   formatting modules for the API.
  94 * (bug 47812) The MediaWiki:Group-user.{css,js} pages can now be used to add
  95   custom CSS or JavaScript enabled only for registered users.
  96 * (bug 52005) Special pages RecentChanges, RecentChangesLinked and Watchlist
  97   now include a legend describing the symbols used in lists of changes.
  98 * Improved the accessibility of the tabs in Special:Preferences.
  99 * Added ApiBeforeMain hook, roughly equivalent to the BeforeInitialize hook:
 100   it's called after everything is set up but before any major processing
 101   happens.
 102 * The jquery.client module now performs a component-wise version comparison in
 103   its #test method when strings are used in the browser map: version '1.10' is
 104   now correctly considered larger than '1.2'. Using numbers in the version map
 105   is not affected.
 106 * All API modules now support an assert parameter, which can either be
 107   'user' or 'bot'. The API will throw an error if the user is not logged
 108   in (user) or does not have the 'bot' userright (bot). Based off of the
 109   AssertEdit extension by Steve Sanbeg.
 110 * WikitextContent will now render redirects with the expected "redirect"
 111   header, rather than as an ordered list. Code calling Article::viewRedirect
 112   can probably be changed to no longer special-case redirects.
 113 * [[Special:Diff]] was added, allowing users to create internal links to
 114   revision comparison pages using syntax such as [[Special:Diff/12345]],
 115   [[Special:Diff/12345/prev]] or [[Special:Diff/12345/98765]].
 116 * New user accounts' personal and talk pages are now watched by them by default.
 117 * Added SkinTemplateGetLanguageLink hook to allow changing the html of language
 118   links.
 119 * Added MessageCache::get hook as a new way to customize messages across
 120   multiple sites.
 121 * Added jquery.throttle-debounce ResourceLoader module to limit the number of
 122   callbacks for frequently occurring events.
 123 * Special:ProtectedPages shows now a table. The timestamp, the reason and
 124   the protecting user is also shown.
 125 * Added experimental support for using Microsoft SQL Server as the database
 126   backend.
 127 ** Added new Microsoft SQL Server-specific configuration variable
 128    $wgDBWindowsAuthentication, which makes the web server authenticate against
 129    the database server using Integrated Windows Authentication instead of
 130    $wgDBuser/$wgDBpassword.
 131 * HTMLForm 'select', 'selectandother', 'selectorother', 'multiselect', and
 132   'radio' fields can now use message keys as labels via the 'options-messages'
 133   parameter, which overrides the 'options' parameter.
 134 * Admins can expire users users passwords manually, or on a schedule using the
 135   $wgPasswordExpirationDays configuration setting.
 136 * Add new hook SendWatchlistEmailNotification, this will be used to determine
 137   whether to send a watchlist email notification.
 138 * (bug 42026) Special:Contributions now includes an option to filter page
 139   creations, similar to the topOnly option.
 140 * Add mediawiki.ui.button styling to all pages so wiki content can use styled
 141   buttons.
 142 * Special:UserLogin/signup now does AJAX checks for invalid and taken usernames,
 143   displaying the error live.
 144 * Added BaseTemplateAfterPortlet hook to allow injecting html after portlets in skins.
 145 * Support has been added for a JSON based localisation file format. The
 146   installer has been updated to use it.
 147 * Changes to content typography (fonts, line-height, etc.). See
 148   https://www.mediawiki.org/wiki/Typography_refresh for further information.
 149 * The Vector skin's visual treatment of external links has been simplified to a
 150   single icon (from nine). This should not affect local rules unless they were
 151   re-using these icons, which have now been deleted.
 152 * ResourceLoader: mw.loader.using() now implements a Promise interface.
 153 * Add new hook ChangesListInitRows accessed via ChangesList::initChangesListRows.
 154   If called by the ChangesList consumer this gives extensions a chance to batch
 155   process the result set prior to rendering.
 156 * A PoolCounterRedis class was added which can be make use of in $wgPoolCounterConf.
 157   This requires at least one Redis 2.6+ server.
 158 * $wgProfileToDatabase was removed. Set $wgProfiler to ProfilerSimpleDB
 159   in StartProfiler.php instead of using this.
 160 * (bug 63444) Made it possible to change the indent string (default: 4 spaces)
 161   used by FormatJson::encode().
 162
 163 === Bug fixes in 1.23 ===
 164 * (bug 41759) The "updated since last visit" markers (on history pages, recent
 165   changes and watchlist) and the talk page message indicator are now correctly
 166   updated when the user is viewing old revisions of pages, instead of always
 167   acting as if the latest revision was being viewed.
 168 * (bug 56443) Special:ConfirmEmail no longer shows a "Mail a confirmation code"
 169   when the email address is already confirmed. Also, consistently use
 170   "confirmed", rather than "authenticated", when messaging whether or not the
 171   user has confirmed an email address.
 172 * (bug 19415) action=render no longer shows section edit links. This affects
 173   behavior of several other features where (bogus) section edit links will
 174   disappear, such as file description pages loaded via $wgUseInstantCommons or
 175   pages transcluded cross-wiki via $wgEnableScaryTranscluding.
 176 * (bug 56912) Show correct link color on cached result of Special:DeadendPages.
 177 * Classes TitleListDependency and TitleDependency have been removed, as they
 178   have been found unused in core and extensions for a long time.
 179 * (bug 57098) SpecialPasswordReset now obeys returnto parameter
 180 * (bug 37812) ResourceLoader will notice when a module's definition changes and
 181   recompile it accordingly.
 182 * (bug 57201) SpecialRecentChangesFilters hook is now executed for feeds.
 183 * (bug 58640) Fixed a compatibility issue with PCRE 8.34 that caused pages
 184   to appear blank or with missing text.
 185 * (bug 56931) Updated the plural rules to CLDR 24. They are in new format
 186   which is detailed in UTS 35 Rev 33. The PHP parser and evaluator as well as
 187   the JavaScript evaluator were updated to support the new format. Plural rules
 188   for some languages have changed, most notably Russian. Affected software
 189   messages have been updated and marked for review at translatewiki.net.
 190 * (bug 14323) Redirect pages, when viewed with redirect=no, no longer hide the
 191   remaining page content.
 192 * (bug 23542) imagelinks now stores both the redirect and target (as
 193   templatelinks does).
 194 * (bug 58167) The web installer no longer throws an exception when PHP is
 195   compiled without support for MySQL yet with support for another DBMS.
 196 * (bug 56199) Raw option of parser functions must now match complete word,
 197   to take effect.
 198 * (bug 60543) Special:PrefixIndex forgot stripprefix=1 for "Next page" link
 199 * (bug 29762) Undoing an already-undone edit will now display an appropriate
 200   message instead of leading the user to make a null edit.
 201 * (bug 52659) mediawiki.notification: Notification area remained visible when
 202   empty and thus was stealing pointer events from links on the page.
 203 * (bug 26811) When a DBUnexpectedError occurs, DB server hostnames are now
 204   hidden unless $wgShowExceptionDetails is true, and $wgShowDBErrorBacktrace
 205   no longer applies in such cases.
 206 * (bug 60960) Avoid doing file_exist() checks on data: URIs, as they cause
 207   warnings to be printed on Windows due to large path length.
 208
 209 === Web API changes in 1.23 ===
 210 * (bug 54884) action=parse&prop=categories now indicates hidden and missing
 211   categories.
 212 * action=query&meta=filerepoinfo now returns additional information for each
 213   repo.
 214 * action=parse&prop=languageshtml was deprecated in 1.18 and will be removed in
 215   MediaWiki 1.24.
 216 * action=parse now has disabletoc flag to disable table of contents in output.
 217 * (bug 25702) list=allcategories, list=allimages, list=alllinks, list=allpages,
 218   list=deletedrevs and list=filearchive did not handle case-sensitivity
 219   properly for all parameters.
 220 * ApiQueryBase::titlePartToKey allows an extra parameter that indicates the
 221   namespace in order to properly capitalize the title part.
 222 * (bug 57874) action=feedcontributions no longer has one item more than limit.
 223 * All API modules now support an assert parameter. See the new features section
 224   for more details.
 225 * Added prop=contributors to fetch the list of contributors to the page.
 226 * The following API modules will now return entries where fields have been
 227   revision-deleted: list=deletedrevs, list=filearchive, list=recentchanges,
 228   list=watchlist. "hidden" indicators will be included, in the same style as is
 229   already done for prop=revisions.
 230 * The following API modules will now return the content of revision-deleted
 231   fields, in addition to the "hidden" indicators, if the querying user has the
 232   necessary rights: list=logevents, list=usercontribs, prop=imageinfo,
 233   prop=revisions.
 234 * The above modules, where applicable, will now return entries filtered by
 235   revision-deleted fields if the querying user has the necessary rights. For
 236   example, prop=revisions with rvuser or rvexcludeuser will no longer skip
 237   revisions where the user was revision-deleted if the current user has the
 238   deletedhistory right.
 239 * The 'hideuser' right, used when blocking, is no longer necessary or
 240   sufficient for seeing contributions with revision-deleted in
 241   list=usercontribs.
 242 * list=watchlist now uses the querying user's rights rather than the wlowner's
 243   rights when checking whether wlprop=patrol is allowed.
 244 * (bug 32151) ApiWatch now has pageset capabilities (titles/pageids/generators).
 245   Title parameter is now deprecated.
 246 * (bug 23005) Added action=revisiondelete.
 247 * Added siprop=restrictions to API action=query&meta=siteinfo for querying
 248   possible page restriction (protection) levels and types.
 249 * Added prop 'limitreportdata' and 'limitreporthtml' to action=parse.
 250 * (bug 58627) Provide language names on action=parse&prop=langlinks.
 251 * Deprecated llurl= in favour of llprop=url for action=query&prop=langlinks.
 252 * Added llprop=langname and llprop=autonym for action=query&prop=langlinks.
 253 * prop=redirects is added, to return redirects to the pages in the query.
 254 * list=allredirects is added, to list all redirects pointing to a namespace.
 255 * (bug 42026) Added ucshow={new,!new,top,!top} to list=usercontribs.
 256   Also added newonly to action=feedcontributions.
 257 * (bug 42026) Deprecated uctoponly in favor of ucshow=top.
 258 * list=search no longer has a "srredirects" parameter. Redirects are now
 259   included in all searches.
 260 * Added list=prefixsearch that works like action=opensearch but can be used as
 261   a generator.
 262 * (bug 24782) Various modules will now use unique continuation parameters.
 263 * (bug 63249) Cache RecentChanges Atom feed in varnish for 15 seconds.
 264
 265 === Languages updated in 1.23 ===
 266
 267 MediaWiki supports over 350 languages. Many localisations are updated
 268 regularly. Below only new and removed languages are listed, as well as
 269 changes to languages because of Bugzilla reports.
 270
 271 * Support was added for Algerian Spoken Arabic (arq).
 272 * Support was added for Riograndenser Hunsrückisch (hrx).
 273 * Support was added for Northern Luri (lrc).
 274
 275 === Other changes in 1.23 ===
 276 * Added pp_sortkey column to page_props table, so pages can be efficiently
 277   queried and sorted by property value (bug 58032).
 278   See $wgPagePropsHaveSortkey if you want to postpone the schema change.
 279 * The rc_type field in the recentchanges table has been superseded by a new
 280   rc_source field.  The rc_source field is a string representation of the
 281   change type where rc_type was a numeric constant.  This field is not yet
 282   queried but will be in a future point release of 1.22.
 283 ** Utilize update.php to create and populate this new field.  On larger wiki's
 284    which do not wish to update recentchanges table in one large update please
 285    review the sql and comments in maintenance/archives/patch-rc_source.sql.
 286 ** The rc_type field of recentchanges will be deprecated in a future point
 287    release.
 288 * The global variable $wgArticle has been removed after a lengthy deprecation.
 289 * The global functions addButton and insertTags (for mw.toolbar.addButton and
 290   mw.toolbar.insertTags) now emits mw.log.warn when accessed.
 291 * The ExpandTemplates extension has been moved into MediaWiki core.
 292 * (bug 52812) Removed "Disable search suggestions" from Preference.
 293 * (bug 52809) Removed "Disable browser page caching" from Preference.
 294 * Three new modules intended for use by custom skins were added:
 295   'mediawiki.skinning.elements', 'mediawiki.skinning.content', and
 296   'mediawiki.skinning.interface', representing three levels of standard
 297   MediaWiki styling. Previously skin creators wishing to use them had to refer
 298   to the file names of appropriate files directly, which is now discouraged.
 299 * The modules 'skins.vector' and 'skins.monobook' have been renamed to
 300   'skins.vector.styles' and 'skins.monobook.styles', respectively,
 301   and their definition was changed not to include the common*.css files;
 302   the two skins now load the 'mediawiki.skinning.interface' module instead.
 303 * A page_links_updated field has been added to the page table.
 304 * SpecialPage::getTitle has been deprecated in favor of
 305   SpecialPage::getPageTitle.
 306 * BREAKING CHANGE: Two potentially backwards-incompatible changes have been made
 307   to the 'SpecialWatchlistQuery' hook's last parameter (array $values) to make
 308   the hook more consistent with the 'SpecialRecentChangesQuery' one:
 309 ** Several array keys have been renamed: hideMinor → hideminor,
 310    hideBots → hidebots, hideAnons → hideanons, hideLiu → hideliu,
 311    hidePatrolled → hidepatrolled, hideOwn → hidemyself.
 312 ** The parameter value is now a FormOptions object, not a plain array (array
 313    access operators should continue to work, as it implements the ArrayAccess
 314    interface).
 315 * Option to mark hooks as deprecated has been added.
 316 * (bug 52811) Preference "Enable section editing via [edit] links" was removed.
 317 * (bug 52813) Preference "Show table of contents (for pages with more than
 318   3 headings)" was removed.
 319 * (bug 52810) Preference "Justify paragraphs" was removed.
 320 * OutputPage::showErrorPage raises a notice if arguments are incoherent.
 321 * Thumbnails that keep failing to render in thumb.php will be rate-limited
 322   againt further render attempts for 1 hour. $wgAttemptFailureEpoch can be
 323   altered to reset all rate-limited thumbnails at once.
 324 * (bug 56572) Builds of the OOjs and OOjs UI libraries are now available.
 325 * mw.loader.go and mw.loader.version have been removed.
 326 * (bug 52815) Preference "Enable simplified search bar (Vector skin only)"
 327   was removed.
 328 * A user_password_expires column has been added to the user table. The User
 329   object expects this column to exist. Use update.php to create this new field.
 330 * The jquery.delayedBind ResourceLoader module was deprecated in favor of the
 331   jquery.throttle-debounce module. It will be removed in MediaWiki 1.24.
 332 * mw.user.bucket has been deprecated.
 333 * On Special:PrefixIndex, a table#mw-prefixindex-list-table was changed to
 334   table.mw-prefixindex-list-table to avoid duplicate ids when the special page
 335   is transcluded.
 336 * (bug 62198) window.$j has been deprecated.
 337 * Preference "Disable link title conversion" was removed.
 338 * SpecialRecentChanges no longer includes any functionality for generating feeds
 339   - it has been factored out to ApiFeedRecentChanges. Old URLs redirect to new
 340   ones.
 341 * RecentChange::mExtra['lang'] is no longer set and should no longer be used.
 342   Extensions should read from other configuration variables, including
 343   $wgLocalInterwikis, to identify the current wiki.
 344 * Sections in the parser test framework have been renamed and the old
 345   section names are deprecated.  Please use "!!wikitext" and "!!html"
 346   (or "!!html/php") instead of "!!input" and "!!result".  This allows
 347   us to extend parser tests to accommodate additional input/output
 348   pairs, such as "!!html/parsoid" (for the output of the Parsoid
 349   parser, where it differs from the PHP parser).
 350 * Special:Search no longer has an "include redirects" option on the advanced
 351   tab. Redirects are now included in all searches.
 352 * mediawiki.api.category's getCategories() 'async' parameter was deprecated.
 353 * The locations of resources have been split between upstream libraries, now in
 354   resources/lib/, local libaries in resources/src/, and local forks of upstream
 355   libraries, also in resources/src/.
 356 * BREAKING CHANGE: The automatically-generated function closure with which
 357   ResourceLoader wraps all modules' JavaScript code now binds the identifier
 358   names 'jQuery' and '$' to the jQuery object of the version of jQuery that is
 359   bundled with MediaWiki. If you bind these names to other objects in global
 360   scope (like Zepto.js or document.querySelectorAll, for example) you will need
 361   to use different names to or re-bind them at the top of each
 362   ResourceLoader-loaded module.
 363 * (bug 52342) Preference "Remember my login" was removed.
 364
 365 ==== Removed classes ====
 366 * FakeMemCachedClient (deprecated in 1.18)
 367 * RdfMetaData (unused)
 368 * TitleDependency (unused)
 369 * TitleListDependency (unused)
 370 * WikiError (deprecated in 1.17)
 371 * WikiXmlError (deprecated in 1.17)
 372 * WikiErrorMsg (deprecated in 1.17)
 373
 374 ==== Renamed classes ====
 375 * CdbReader_DBA to CdbReaderDBA
 376 * CdbReader_PHP to CdbReaderPHP
 377 * CdbWriter_DBA to CdbWriterDBA
 378 * CdbWriter_PHP to CdbWriterPHP
 379 * DiffOp_Add to DiffOpAdd
 380 * DiffOp_Change to DiffOpChange
 381 * DiffOp_Copy to DiffOpCopy
 382 * DiffOp_Delete to DiffOpDelete
 383 * HWLDF_WordAccumulator to HWLDFWordAccumulator
 384 * LBFactory_Fake to LBFactoryFake
 385 * LBFactory_Multi to LBFactoryMulti
 386 * LBFactory_Simple to LBFactorySimple
 387 * LBFactory_Single to LBFactorySingle
 388 * LCStore_Accel to LCStoreAccel
 389 * LCStore_CDB to LCStoreCDB
 390 * LCStore_DB to LCStoreDB
 391 * LCStore_Null to LCStoreNull
 392 * LoadBalancer_Single to LoadBalancerSingle
 393 * LoadMonitor_MySQL to LoadMonitorMySQL
 394 * LoadMonitor_Null to LoadMonitorNull
 395 * LocalisationCache_BulkLoad to LocalisationCacheBulkLoad
 396 * csvStatsOutput to CsvStatsOutput
 397 * extensionLanguages to ExtensionLanguages
 398 * languages to Languages
 399 * statsOutput to StatsOutput
 400 * textStatsOutput to TextStatsOutput
 401 * wikiStatsOutput to WikiStatsOutput
 402
 403 ==== Removed methods ====
 404 * ApiBase::getValidNamespaces() (deprecated in 1.17)
 405 * ApiMain::setCachePrivate() (deprecated in 1.17)
 406 * ApiMain::setVaryCookie (deprecated in 1.17)
 407 * Article::doRedirect() (deprecated in 1.18)
 408 * Article::doUnwatch() (deprecated in 1.18)
 409 * Article::doWatch() (deprecated in 1.18)
 410 * Article::forUpdate() (deprecated in 1.18)
 411 * Article::markpatrolled() (deprecated in 1.18)
 412 * Article::unwatch() (deprecated in 1.18)
 413 * Article::watch() (deprecated in 1.18)
 414 * Block::clear() (deprecated in 1.18)
 415 * Block::decodeExpiry() (deprecated in 1.18)
 416 * Block::encodeExpiry() (deprecated in 1.18)
 417 * Block::forUpdate() (deprecated in 1.18)
 418 * Block::infinity() (deprecated in 1.18)
 419 * Block::load() (deprecated in 1.18)
 420 * Block::newFromDB() (deprecated in 1.18)
 421 * Block::normaliseRange() (deprecated in 1.18)
 422 * Block::parseExpiryInput() (deprecated in 1.18)
 423 * CategoryViewer::addSubcategory() (deprecated in 1.17)
 424 * EditPage::spamPage() (deprecated since 1.17)
 425 * Exif::getFormattedData() (deprecated in 1.18)
 426 * Exif::makeFormattedData() (deprecated in 1.18)
 427 * in_string (deprecated in 1.21)
 428 * Language::convertLinkToAllVariants() (deprecated in 1.17)
 429 * LanguageConverter::convertLinkToAllVariants() (deprecated in 1.17)
 430 * Linker::makeBrokenLink() (deprecated in 1.16)
 431 * Linker::makeBrokenLinkObj() (deprecated in 1.16)
 432 * Linker::makeColouredLinkObj() (deprecated in 1.16)
 433 * Linker::makeSizeLinkObj() (deprecated in 1.17)
 434 * MediaWiki::articleFromTitle() (deprecated in 1.18)
 435 * ParserOptions::getkin() (deprecated 1.18)
 436 * ProfilerSimple::getCpuTime (deprecated in 1.20)
 437 * Revision::revText() (deprecated in 1.17)
 438 * SkinTemplate::jstext() (deprecated in 1.21)
 439 * SpecialPage::__call() (deprecated in 1.17)
 440 * SpecialPage::executePath() (deprecated in 1.18)
 441 * SpecialPage::exists() (deprecated in 1.18)
 442 * SpecialPage::file() (deprecated in 1.18)
 443 * SpecialPage::func() (deprecated in 1.18)
 444 * SpecialPage::getGroup() (deprecated in 1.18)
 445 * SpecialPage::getPage() (deprecated in 1.18)
 446 * SpecialPage::getPageByAlias() (deprecated in 1.18)
 447 * SpecialPage::getLocalNameFor() (deprecated in 1.18)
 448 * SpecialPage::getRegularPages() (deprecated in 1.18)
 449 * SpecialPage::getRestrictedPages() (deprecated in 1.18)
 450 * SpecialPage::getTitleForAlias() (deprecated in 1.18)
 451 * SpecialPage::getUsablePages() (deprecated in 1.18)
 452 * SpecialPage::includable() (deprecated in 1.18)
 453 * SpecialPage::init()
 454 * SpecialPage::initAliasList() (deprecated in 1.18)
 455 * SpecialPage::initList() (deprecated in 1.18)
 456 * SpecialPage::name() (deprecated in 1.18)
 457 * SpecialPage::removePage() (deprecated in 1.18)
 458 * SpecialPage::resolveAlias() (deprecated in 1.18)
 459 * SpecialPage::resolveAliasWithSubpage() (deprecated in 1.18)
 460 * SpecialPage::restriction() (deprecated in 1.18)
 461 * SpecialPage::setGroup() (deprecated in 1.18)
 462 * SpecialRecentChanges::feedSetup()
 463 * SpecialRevisionDelete::extractBitField() (deprecated in 1.22)
 464 * User::getPageRenderingHash() (deprecated in 1.17)
 465 * WebRequest::getFileSize() (deprecated in 1.17)
 466 * WebRequest::isPathInfoBad() (deprecated in 1.17)
 467 * wfGenerateToken (deprecated in 1.20)
 468 * wfStreamFile (deprecated in 1.19)
 469 * wfUILang (deprecated in 1.18)
 470 * WikiPage::createUpdates() (deprecated in 1.18)
 471 * WikiPage::quickEdit() (deprecated in 1.18)
 472 * WikiPage::useParserCache() (deprecated in 1.18)
 473 * WikiPage::viewUpdates() (deprecated in 1.18)
 474
 475 ==== Removed globals ====
 476 * $wgBetterDirectionality (deprecated in 1.18)
 477
 478 == Compatibility ==
 479
 480 MediaWiki 1.23 requires PHP 5.3.2 or later.
 481
 482 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
 483 support for them is somewhat less mature. There is experimental support for
 484 Oracle and Microsoft SQL Server.
 485
 486 The supported versions are:
 487
 488 * MySQL 5.0.2 or later
 489 * PostgreSQL 8.3 or later
 490 * SQLite 3.3.7 or later
 491 * Oracle 9.0.1 or later
 492 * Microsoft SQL Server 2005 (9.00.1399)
 493
 494 == Upgrading ==
 495
 496 1.23 has several database changes since 1.22, and will not work without schema
 497 updates. Note that due to changes to some very large tables like the revision
 498 table, the schema update may take quite long (minutes on a medium sized site,
 499 many hours on a large site).
 500
 501 If upgrading from before 1.11, and you are using a wiki as a commons
 502 repository, make sure that it is updated as well. Otherwise, errors may arise
 503 due to database schema changes.
 504
 505 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
 506 new database fields are filled with data.
 507
 508 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
 509 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
 510 with MediaWiki 1.21.
 511
 512 Don't forget to always back up your database before upgrading!
 513
 514 See the file UPGRADE for more detailed upgrade instructions.
 515
 516 For notes on 1.21.x and older releases, see HISTORY.
 517
 518 == Online documentation ==
 519
 520 Documentation for both end-users and site administrators is available on
 521 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 522 for pages that explicitly state that their contents are in the public domain):
 523
 524         https://www.mediawiki.org/wiki/Documentation
 525
 526 == Mailing list ==
 527
 528 A mailing list is available for MediaWiki user support and discussion:
 529
 530         https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 531
 532 A low-traffic announcements-only list is also available:
 533
 534         https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 535
 536 It's highly recommended that you sign up for one of these lists if you're
 537 going to run a public MediaWiki, so you can be notified of security fixes.
 538
 539 == IRC help ==
 540
 541 There's usually someone online in #mediawiki on irc.freenode.net.