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Change notes from older releases. For current info see RELEASE-NOTES-1.29.
= MediaWiki 1.28 =
== MediaWiki 1.28.1 ==
This is a security and maintenance release of the MediaWiki 1.28 branch.
=== Changes since 1.28.0 ===
* $wgRunJobsAsync is now false by default (T142751). This change only affects
wikis with $wgJobRunRate > 0.
* Fix fatal from "WaitConditionLoop" not being found, experienced when a wiki has
more than one database server setup.
* (T152717) Better escaping for PHP mail() command,
* (T154670) A missing method causing the MySQL installer to fatal in rare
circumstances was restored.
* (T154672) Un-deprecate ArticleAfterFetchContentObject hook.
* (T158766) Avoid SQL error on MSSQL when using selectRowCount().
* (T145635) Fix too long index error when installing with MSSQL.
* (T156184) $wgRawHtml will no longer apply to internationalization messages.
* (T160519) CACHE_ANYTHING will not be CACHE_ACCEL if no accelerator is installed.
* (T154872) Fix incorrect ar_usertext_timestamp index names in new 1.28 installs.
* (T109140) (T122209) SECURITY: Special:UserLogin and Special:Search allow redirect
to interwiki links.
* (T144845) SECURITY: XSS in SearchHighlighter::highlightText() when
$wgAdvancedSearchHighlighting is true.
* (T125177) SECURITY: API parameters may now be marked as "sensitive" to keep
their values out of the logs.
* (T150044) SECURITY: "Mark all pages visited" on the watchlist now requires a CSRF
token.
* (T156184) SECURITY: Escape content model/format url parameter in message.
* (T151735) SECURITY: SVG filter evasion using default attribute values in DTD
declaration.
* (T161453) SECURITY: LocalisationCache will no longer use the temporary directory
in it's fallback chain when trying to work out where to write the cache.
* (T48143) SECURITY: Spam blacklist ineffective on encoded URLs inside file inclusion
syntax's link parameter.
* (T108138) SECURITY: Sysops can undelete pages, although the page is protected against
it.
== MediaWiki 1.28 ==
=== Changes since 1.28.0-rc1 ===
* (T148957) Replace wgShowExceptionDetails with wgShowDBErrorBacktrace on db
errors.
* (T148956) Only apply wgDBschema to postgres/mssql.
* (T145991) Introduce separate log action for deleting pages on move.
* (T141474) (T110464) Bypass login page if no user input is required.
=== Changes since 1.28.0-rc0 ===
* (T142210) The changes to move the parser "NewPP limit report" from a HTML
comment to a machine-readable JavaScript config option 'wgPageParseReport'
have been undone. They caused the human-readable limit report to be shown
incompletely or not at all. ParserOutput::setLimitReportData() and
getLimitReportData() behave as they did in MediaWiki 1.27 again.
* (T149510) Value of {{DISPLAYTITLE:}} parser function will not be used for
the text of subheadings on a category page when creating it. This wasn't
working correctly.
* (T106793) MediaWiki will no longer try to perform a HTTP redirect to the
canonical pretty URL when a non-pretty URL is used. It resulted in redirect
loops in some clients and in some server configurations. This undoes a change
made in MediaWiki 1.26.
* (T149759) manifest_version: 2 was removed.
=== Configuration changes in 1.28 ===
* $wgSend404Code now affects status code of action=history if the page is not there.
* BREAKING CHANGE: $wgHTTPProxy is now *required* for all external requests
made by MediaWiki via a proxy. Relying on the http_proxy environment
variable is no longer supported.
* The load.php entry point now enforces the existing policy of not allowing
access to session data, which includes the session user and the session
user's language. If such access is attempted, an exception will be thrown.
* The number of internal PBKDF2 iterations used to derive the session secret
is configurable via $wgSessionPbkdf2Iterations.
* Upload dialog's file upload log comment can now be configured separately for
local and foreign uploads.
* $wgForeignUploadTargets now defaults to `[ 'local' ]`, where `'local'`
signifies local uploads. A value of `[]` (empty array) now means that
no upload targets are allowed, effectively disabling the upload dialog.
* The deprecated $wgEditEncoding variable has been removed; it was only used
for Esperanto language character conversion. You are now recommended to use
input methods provided by the UniversalLanguageSelector extension.
* When $wgPingback is true, MediaWiki will periodically ping
https://www.mediawiki.org/beacon with basic information about the local
MediaWiki installation. This data includes, for example, the type of system,
PHP version, and chosen database backend. This behavior is off by default.
* When $wgEditSubmitButtonLabelPublish is true, MediaWiki will label the button
to store-to-database-and-show-to-others as "Publish page"/"Publish changes";
if false, the default, they will be "Save page"/"Save changes".
* The 'editcontentmodel' permission is now granted to all logged-in users ('user').
instead of just administrators ('sysop'). Documentation for this feature is
available at <https://www.mediawiki.org/wiki/Help:ChangeContentModel>.
* $wgRevisionCacheExpiry is now set to one week by default instead of being disabled.
* Magic links are now disabled by default, and can be re-enabled by modifying the value
of $wgEnableMagicLinks. Their usage is discouraged, but if they are manually enabled,
a tracking category will be added to help identify usage and make it easier to migrate
away from. If you depend upon magic link functionality, it is requested that you comment
on <https://www.mediawiki.org/wiki/Requests_for_comment/Future_of_magic_links> and
explain your use case(s).
* New config variable $wgCSPFalsePositiveUrls to control what URLs to ignore
in upcoming Content-Security-Policy feature's reporting.
=== New features in 1.28 ===
* User::isBot() method for checking if an account is a bot role account.
* Added a new 'slideshow' mode for galleries.
* Added a new hook, 'UserIsBot', to aid in determining if a user is a bot.
* Added a new hook, 'ApiMakeParserOptions', to allow extensions to better
interact with API parsing.
* Added a new hook, 'UploadVerifyUpload', which can be used to reject a file
upload. Unlike 'UploadVerifyFile' it provides information about upload comment
and the file description page, but does not run for uploads to stash.
* (T141604) Extensions can now provide a better error message when their
maintenance scripts are run without the extension being installed.
* (T8948) Numeric sorting in categories is now supported by setting $wgCategoryCollation
to 'uca-default-u-kn' or 'uca-<langcode>-u-kn'. If you can't use UCA collations,
a 'numeric' collation is also available. If migrating from another
collation, you will need to run the updateCollation.php maintenance script.
* Two new codes have been added to #time parser function: "xit" for days in current
month, and "xiz" for days passed in the year, both in Iranian calendar.
* mw.Api has a new option, useUS, to use U+001F (Unit Separator) when
appropriate for sending multi-valued parameters. This defaults to true when
the mw.Api instance seems to be for the local wiki.
* After a client performs an action which alters a database that has replica databases,
MediaWiki will wait for the replica databases to synchronize with the master database
while it renders the HTML output. However, if the output is a redirect to another wiki
on the wiki farm with a different domain, MediaWiki will instead alter the redirect
URL to include a ?cpPosTime parameter that triggers the database synchronization when
the URL is followed by the client. The same-domain case uses a new cpPosTime cookie.
* Added new hooks, 'ApiQueryBaseBeforeQuery', 'ApiQueryBaseAfterQuery', and
'ApiQueryBaseProcessRow', to make it easier for extensions to add 'prop' and
'show' parameters to existing API query modules.
=== External library changes in 1.28 ===
==== Upgraded external libraries ====
* Updated es5-shim from v4.1.5 to v4.5.8
* Updated composer/semver from v1.4.1 to v1.4.2
* Updated wikimedia/php-session-serializer from v1.0.3 to v1.0.4
==== New external libraries ====
* Added wikimedia/scoped-callback v1.0.0
* Added wikimedia/wait-condition-loop v1.0.1
=== Bug fixes in 1.28 ===
* (T146496) action=history pages should return 404 HTTP error code if the page does not exist
* (T137264) SECURITY: XSS in unclosed internal links
* (T133147) SECURITY: Escape '<' and ']]>' in inline <style> blocks
* (T133147) SECURITY: Require login to preview user CSS pages
* (T132926) SECURITY: Do not allow undeleting a revision deleted file if it is
the top file
* (T129738) SECURITY: Make $wgBlockDisablesLogin also restrict logged in
permissions
* (T129738) SECURITY: Make blocks log users out if $wgBlockDisablesLogin is true
* (T139670) Move 'UserGetRights' call before application of
Session::getAllowedUserRights()
=== Action API changes in 1.28 ===
* Added 'maxarticlesize' property to action=query&meta=siteinfo which contains
the value of $wgMaxArticleSize.
* Property 'modulemessages' from action=parse&prop=modules was removed
(deprecated since 1.26).
* The following response properties from action=login, deprecated in 1.27, are
now removed: lgtoken, cookieprefix, sessionid. Clients should handle cookies
to properly manage session state.
* Submitting the lgtoken and lgpassword parameters in the query string to
action=login is now deprecated and outputs a warning. They should be submitted
in the POST body instead.
* Submitting sensitive authentication request parameters to action=clientlogin,
action=createaccount, action=linkaccount, and action=changeauthenticationdata
in the query string is now deprecated and outputs a warning. They should be
submitted in the POST body instead.
* (T141960) Multi-valued parameters may now be separated using U+001F (Unit Separator)
instead of the pipe character. This will be useful if some of the multiple
values need to contain pipes, e.g. for action=options.
* The API will now warn if input is not NFC-normalized Unicode or if it
contains invalid characters.
* The 'normalized' list output by action=query and other modules that use
ApiPageSet may contain entries where the 'from' value is percent-encoded as
the raw value cannot be represented in a valid API response. These are
indicated by a 'fromencoded' boolean alongside the existing 'from' parameter.
* (T28680) action=paraminfo can now return info about all submodules of a
module without listing them all explicitly.
* (T146770) It is now possible to assert that the current user is a specific
named user, using the 'assertuser' parameter.
* (T141963) Added a 'known' property when missing-but-known titles (e.g. from
the 'TitleIsAlwaysKnown' hook) are output in various modules.
=== Action API internal changes in 1.28 ===
* Added a new hook, 'ApiMakeParserOptions', to allow extensions to better
interact with ApiParse and ApiExpandTemplates.
* (T139565) SECURITY: API: Generate head items in the context of the given title
* (T115333) SECURITY: Check read permission when loading page content in ApiParse
* ApiBase::getResultData() was removed (deprecated since 1.25)
* ApiBase::makeHelpArrayToString() was removed (deprecated since 1.25)
* ApiBase::makeHelpMsgParameters() was removed (deprecated since 1.25)
* ApiBase::makeHelpMsg() was removed (deprecated since 1.25)
* ApiFormatBase::formatHTML() was removed (deprecated since 1.25)
* ApiFormatBase::getNeedsRawData() was removed (deprecated since 1.25)
* ApiFormatBase::getWantsHelp() was removed (deprecated since 1.25)
* ApiFormatBase::setBufferResult() was removed (deprecated since 1.25)
* ApiFormatBase::setHelp() was removed (deprecated since 1.25)
* ApiFormatBase::setUnescapeAmps() was removed (deprecated since 1.25)
* ApiMain::makeHelpMsgHeader() was removed (deprecated since 1.25)
* ApiMain::reallyMakeHelpMsg() was removed (deprecated since 1.25)
* ApiMain::setHelp() was removed (deprecated since 1.25)
* ApiResult::beginContinuation() was removed (deprecated since 1.25)
* ApiResult::cleanUpUTF8() was removed (deprecated since 1.25)
* ApiResult::convertStatusToArray() was removed (deprecated since 1.25)
* ApiResult::disableSizeCheck() was removed (deprecated since 1.24)
* ApiResult::enableSizeCheck() was removed (deprecated since 1.24)
* ApiResult::endContinuation() was removed (deprecated since 1.25)
* ApiResult::getData() was removed (deprecated since 1.25)
* ApiResult::getIsRawMode() was removed (deprecated since 1.25)
* ApiResult::setContent() was removed (deprecated since 1.25)
* ApiResult::setContinueParam() was removed (deprecated since 1.25)
* ApiResult::setElement() was removed (deprecated since 1.25)
* ApiResult::setGeneratorContinueParam() was removed (deprecated since 1.25)
* ApiResult::setIndexedTagName_internal() was removed (deprecated since 1.25)
* ApiResult::setIndexedTagName_recursive() was removed (deprecated since 1.25)
* ApiResult::setMainForContinuation() was removed (deprecated since 1.25)
* ApiResult::setParsedLimit() was removed (deprecated since 1.25)
* ApiResult::setRawMode() was removed (deprecated since 1.25)
* ApiResult::size() was removed (deprecated since 1.25)
* Added new hooks, 'ApiQueryBaseBeforeQuery', 'ApiQueryBaseAfterQuery', and
'ApiQueryBaseProcessRow', to make it easier for extensions to add 'prop' and
'show' parameters to existing API query modules. A query module can enable
these hooks by passing an array for $hookData to ApiQueryBase::select() and
by calling ApiQueryBase->processRow() before adding a row's data to the
result.
=== Languages updated in 1.28 ===
MediaWiki supports over 375 languages. Many localisations are updated
regularly. Below only new and removed languages are listed, as well as
changes to languages because of Phabricator reports.
* (T137411) ban (Balinese), thanks to translators Adi Mayndra, Andru,
BASAbali, M. Adiputra, Naval Scene, Nemo bis, NoiX180, and 아라.
* (T135867) shn (Shan), thanks to translators Khun Sar, Piangpha,
Saiddzone Saimawnkham, Saosukham, and Sengwan.
* Czech (cs) and Slovak (sk) set as reciprocal fallbacks.
* (T146744) Livvi-Karelian (olo) namespace messages created thanks to translator Ilja.mos.
=== Other changes in 1.28 ===
* (T128697) Improved handling of large diffs.
* [BREAKING CHANGE] $wgExtendedLoginCookies has been removed. You can
use or update a custom session provider if needed.
* Deprecated APIEditBeforeSave hook in favor of EditFilterMergedContent.
* The 'UploadVerification' hook is deprecated. Use 'UploadVerifyFile' instead.
* SiteConfiguration::isLocalVHost() was removed (deprecated since 1.25).
* The 'UserLoginComplete' hook has a new parameter to differentiate between actual
login and visiting the login page while already logged in.
* ResourceLoader::makeLoaderURL() was removed (deprecated since 1.24).
* $.fn.liveAndTestAtStart was removed (deprecated since 1.24).
* mw.util.tooltipAccessKeyPrefix was removed (deprecated since 1.24).
* mw.util.tooltipAccessKeyRegexp was removed (deprecated since 1.24).
* Linker::link() and Linker::linkKnown() were deprecated; please instead use
MediaWiki\Linker\LinkRenderer. In addition, the LinkBegin and LinkEnd hooks
were replaced by HtmlPageLinkRendererBegin and HtmlPageLinkRendererEnd
respectively. See docs/hooks.txt for the specific changes needed for those hooks.
* Linker::formatSize() was deprecated. Use Language::formatSize() directly.
* Aliases for Linker methods, deprecated since 1.21, were removed from Skin:
* Skin::commentBlock() (use Linker::commentBlock() instead)
* Skin::generateRollback() (use Linker::generateRollback() instead)
* Skin::link() (use MediaWiki\Linker\LinkRenderer instead)
* Skin::linkKnown() (use MediaWiki\Linker\LinkRenderer instead)
* Skin::userLink() (use Linker::userLink() instead)
* Skin::userToolLinks() (use Linker::userToolLinks() instead)
* Disabled "bug 2702" HTML tidying of parsed UI messages on wikis where Tidy is
disabled.
* DifferenceEngine::generateDiffBody() was removed (deprecated since 1.21).
* UploadBase::stashFileGetKey() and UploadBase::stashSession() were deprecated.
Use ...->stashFile()->getFileKey() instead.
* "Public domain" was removed as a wiki license option from the installer, in
favour of CC-0.
* AuthenticationRequest::$required is now changed from REQUIRED to PRIMARY_REQUIRED
on requests needed by primary providers even if all primaries need them.
Primary providers are discouraged from returning multiple REQUIRED requests.
* OOjs UI PHP widgets constructed with the `'infusable' => true` config option
will no longer be automatically infused. You should call `OO.ui.infuse()`
on them yourself from your JavaScript code.
* parserTests.php has moved to tests/parser/parserTests.php
* The command line options specific to parser tests have been removed from
phpunit.php: --regex and --keep-uploads. Instead of --regex, use --filter.
Instead of --keep-uploads, use the same option to parserTests.php, but you
must specify a directory with --upload-dir.
* The 'jquery.arrowSteps' ResourceLoader module is now deprecated.
* IP::isConfiguredProxy() and IP::isTrustedProxy() were removed. Callers should
migrate to using the same functions on a ProxyLookup instance, obtainable from
MediaWikiServices.
* The ArticleAfterFetchContent, ArticleInsertComplete, ArticleSave, ArticleSaveComplete,
ArticleViewCustom, EditFilterMerged, EditPageGetDiffText, EditPageGetPreviewText and
ShowRawCssJs hooks will now emit deprecation warnings if used.
* (T68404) CSS3 attr() function with url type is no longer allowed
in inline styles.
* Database::getSearchEngine() is deprecated, use SearchEngineFactory::getSearchEngineClass
instead.
== Compatibility ==
MediaWiki 1.28 requires PHP 5.5.9 or later. There is experimental support for
HHVM 3.6.5 or later.
MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
support for them is somewhat less mature. There is experimental support for
Oracle and Microsoft SQL Server.
The supported versions are:
* MySQL 5.0.3 or later
* PostgreSQL 8.3 or later
* SQLite 3.3.7 or later
* Oracle 9.0.1 or later
* Microsoft SQL Server 2005 (9.00.1399)
== Upgrading ==
1.28 has several database changes since 1.27, and will not work without schema
updates. Note that due to changes to some very large tables like the revision
table, the schema update may take quite long (minutes on a medium sized site,
many hours on a large site).
If upgrading from before 1.11, and you are using a wiki as a commons
repository, make sure that it is updated as well. Otherwise, errors may arise
due to database schema changes.
If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
new database fields are filled with data.
If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
with MediaWiki 1.21.
Don't forget to always back up your database before upgrading!
See the file UPGRADE for more detailed upgrade instructions.
For notes on 1.27.x and older releases, see HISTORY.
== Online documentation ==
Documentation for both end-users and site administrators is available on
MediaWiki.org, and is covered under the GNU Free Documentation License (except
for pages that explicitly state that their contents are in the public domain):
https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
== Mailing list ==
A mailing list is available for MediaWiki user support and discussion:
https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
A low-traffic announcements-only list is also available:
https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
It's highly recommended that you sign up for one of these lists if you're
going to run a public MediaWiki, so you can be notified of security fixes.
== IRC help ==
There's usually someone online in #mediawiki on irc.freenode.net.
= MediaWiki 1.27 =
== MediaWiki 1.27.2 ==
This is a security and maintenance release of the MediaWiki 1.27 branch.
ApiCreateAccount was removed in 1.27.0. It was incorrectly still marked as
deprecated (rather than already removed) in the RELEASE-NOTES at the point 1.27.0
was released.
=== Changes since 1.27.1 ===
* (T68404) CSS3 attr() function with url type argument is no longer allowed
in inline styles.
* $wgRunJobsAsync is now false by default (T142751). This change only affects
wikis with $wgJobRunRate > 0.
* (T152717) Better escaping for PHP mail() command
* Submitting the lgtoken and lgpassword parameters in the query string to
action=login is now deprecated and outputs a warning. They should be submitted
in the POST body instead.
* Submitting sensitive authentication request parameters to action=clientlogin,
action=createaccount, action=linkaccount, and action=changeauthenticationdata
in the query string is now deprecated and outputs a warning. They should be
submitted in the POST body instead.
* (T158766) Avoid SQL error on MSSQL when using selectRowCount()
* (T145635) Fix too long index error when installing with MSSQL.
* (T156184) $wgRawHtml will no longer apply to internationalization messages.
* (T160519) CACHE_ANYTHING will not be CACHE_ACCEL if no accelerator is installed.
* (T109140) (T122209) SECURITY: Special:UserLogin and Special:Search allow redirect
to interwiki links.
* (T144845) SECURITY: XSS in SearchHighlighter::highlightText() when
$wgAdvancedSearchHighlighting is true.
* (T125177) SECURITY: API parameters may now be marked as "sensitive" to keep
their values out of the logs.
* (T150044) SECURITY: "Mark all pages visited" on the watchlist now requires a CSRF
token.
* (T156184) SECURITY: Escape content model/format url parameter in message.
* (T151735) SECURITY: SVG filter evasion using default attribute values in DTD
declaration.
* (T161453) SECURITY: LocalisationCache will no longer use the temporary directory
in it's fallback chain when trying to work out where to write the cache.
* (T48143) SECURITY: Spam blacklist ineffective on encoded URLs inside file inclusion
syntax's link parameter.
* (T108138) SECURITY: Sysops can undelete pages, although the page is protected against
it.
== MediaWiki 1.27.1 ==
This is a maintenance release of the MediaWiki 1.27 branch.
=== Changes since 1.27.0 ===
* BREAKING CHANGE: $wgHTTPProxy is now *required* for all external requests
made by MediaWiki via a proxy. Relying on the http_proxy environment
variable is no longer supported.
* (T139565) SECURITY: API: Generate head items in the context of the given title
* (T137264) SECURITY: XSS in unclosed internal links
* (T133147) SECURITY: Escape '<' and ']]>' in inline <style> blocks
* (T133147) SECURITY: Require login to preview user CSS pages
* (T132926) SECURITY: Do not allow undeleting a revision deleted file if it is
the top file
* (T129738) SECURITY: Make $wgBlockDisablesLogin also restrict logged in
permissions
* (T129738) SECURITY: Make blocks log users out if $wgBlockDisablesLogin is true
* (T115333) SECURITY: Check read permission when loading page content in ApiParse
* (T57548) Remove support for $wgWellFormedXml = false, all output is now well formed
* (T139670) Move 'UserGetRights' call before application of Session::getAllowedUserRights()
== MediaWiki 1.27.0 ==
=== PHP version requirement in 1.27 ===
As of 1.27, MediaWiki now requires PHP 5.5.9 or higher (see Compatibility
section). Additionally, the following PHP extensions are required:
* ctype
* iconv
* json
* mbstring (new requirement in 1.27)
* xml
The following PHP extensions are strongly recommended:
* openssl
=== Configuration changes in 1.27 ===
* $wgAllowMicrodataAttributes and $wgAllowRdfaAttributes were removed,
now always enabled. If you use RDFa on your wiki, you now have to explicitly
set $wgHtml5Version to 'HTML+RDFa 1.0' or 'XHTML+RDFa 1.0'.
* $wgUseLinkNamespaceDBFields was removed.
* Deprecated $wgResourceLoaderMinifierStatementsOnOwnLine and
$wgResourceLoaderMinifierMaxLineLength, because there was little value in
making the behavior configurable. The default values (`false` for the former,
1000 for the latter) are now hard-coded.
* $wgDebugDumpSqlLength was removed (deprecated in 1.24).
* $wgDebugDBTransactions was removed (deprecated in 1.20).
* $wgUseXVO has been removed, as it provides functionality only used by
custom Wikimedia patches against Squid 2.x that probably noone uses in
production anymore. There is now $wgUseKeyHeader that provides similar
functionality but instead of the MediaWiki-specific X-Vary-Options header,
uses the draft Key header standard.
* $wgScriptExtension (and support for '.php5' entry points) was removed. See the
deprecation notice in the release notes for version 1.25 for advice on how to
preserve support for '.php5' entry points via URL rewriting.
* Password handling via the User object has been deprecated and partially
removed, pending the future introduction of AuthManager. In particular:
** expirePassword(), getPasswordExpireDate(), resetPasswordExpiration(), and
getPasswordExpired() have been removed. They were unused outside of core.
** The mPassword, mNewpassword, mNewpassTime, and mPasswordExpires fields are
now private and will be removed in the future.
** The getPassword() and getTemporaryPassword() methods now throw
BadMethodCallException and will be removed in the future.
** The ability to pass 'password' and 'newpassword' to createNew() has been
removed. The only users of it seem to have been using it to set invalid
passwords, and so shouldn't be greatly affected.
** setPassword(), setInternalPassword(), and setNewpassword() have been
deprecated, pending the introduction of AuthManager.
** User::randomPassword() is deprecated in favor of a new method
PasswordFactory::generateRandomPasswordString()
** User::getPasswordFactory() is deprecated, callers should just create a
PasswordFactory themselves.
** A new constructor, User::newSystemUser(), has been added to simplify the
creation of passwordless "system" users for logged actions.
* $wgMaxSquidPurgeTitles was removed.
* $wgAjaxWatch was removed. This is now enabled by default.
* $wgUseInstantCommons now hotlinks Commons images by default instead of
downloading originals and thumbnailing them locally. This allows wikis to save
on CPU and bandwidth while reducing time to first byte for pages, even without
a thumbnail handler. See $wgForeignFileRepos documentation for tweaks.
* (T27397) WebP is enabled by default as an uploadable filetype.
* (T48998) $wgArticlePath must now be either a full url, or start with a "/".
* $wgRateLimitLog was removed; use $wgDebugLogGroups['ratelimit'] instead.
* Deprecated API formats dbg, txt, and yaml have been removed.
* CLDRPluralRule* classes have been replaced with
wikimedia/cldr-plural-rule-parser.
* Removed $wgProfilePerHost, $wgUDPProfilerHost, $wgUDPProfilerPort,
$wgUDPProfilerFormatString, $wgStatsMethod, $wgAggregateStatsID,
$wgStatsFormatString, and $wgProfileCallTree (deprecated since 1.20).
* For proper operation of LocalIdLookup with shared user tables, ensure that
$wgSharedDB and $wgSharedTables are properly set even on the "central" wiki
that all others are sharing from and that $wgLocalDatabases is set to the
full list of sharing wikis on all those wikis.
* Massive overhaul to session handling:
** $wgSessionsInObjectCache is no longer supported and must be true, due to
MediaWiki\Session\SessionManager. $wgSessionHandler is similarly no longer
used.
** ObjectCacheSessionHandler is removed, replaced with
MediaWiki\Session\PhpSessionHandler.
** PHP session handling in general ($_SESSION, session_id(), and so on) is
deprecated. Use MediaWiki\Session\SessionManager instead. A new config
variable, $wgPHPSessionHandling, is available to cause use of $_SESSION to
issue a deprecation warning or to cause most PHP session handling to throw
exceptions.
** Deprecated UserSetCookies hook. Session-handling extensions should generally
be creating a custom subclass of CookieSessionProvider. Other extensions
messing with cookies can no longer count on user data being saved in cookies
versus other methods.
** Deprecated UserLoadFromSession hook, extensions should create a
MediaWiki\Session\SessionProvider.
** The User cannot be loaded from session until after Setup.php completes.
Attempts to do so will be ignored and the User will remain unloaded.
** CSRF tokens may be fetched from the MediaWiki\Session\Session, which uses
the MediaWiki\Session\Token class.
* MediaWiki will now auto-create users as necessary, removing the need for
extensions to do so. An 'autocreateaccount' right is added to allow
auto-creation when 'createaccount' is not granted to all users.
* Deprecated AuthPluginAutoCreate hook in favor of LocalUserCreated.
* Most cookie-handling methods in User are deprecated.
* $wgAllowAsyncCopyUploads and $CopyUploadAsyncTimeout were removed. This was an
experimental feature that has never worked.
* Login and createaccount tokens now vary by timestamp.
* LoginForm::getLoginToken() and LoginForm::getCreateaccountToken()
return a MediaWiki\Session\Token, and tokens must be checked using that
class's methods.
* $wgEnotifUseJobQ was removed and the job queue is always used.
* The functionality of the ApiSandbox extension has been merged into core. The
extension should no longer be used.
* $wgPreloadJavaScriptMwUtil was removed (deprecated in 1.26).
Extensions, skins, gadgets and scripts that use the mediawiki.util module must
express a dependency on it.
* $wgIncludeLegacyJavaScript, deprecated in MediaWiki 1.26, now defaults false.
Extensions, skins, gadgets and scripts that need the mediawiki.legacy.wikibits
module should express a dependency on it.
* Removed configuration option $wgCopyrightIcon (deprecated since 1.18). Use
$wgFooterIcons['copyright']['copyright'] instead.
* If the openssl and mcrypt PHP extensions are both unavailable, secure
session storage (used for login) will raise an exception. This exception may
be bypassed by setting $wgSessionInsecureSecrets = true.
* Massive overhaul to authentication:
** AuthPlugin and AuthPluginUser are deprecated.
** LoginForm and associated templates are deprecated. Extensions which called
static LoginForm methods should be converted into authentication providers.
** The following hooks are deprecated:
*** AbortAutoAccount (create a MediaWiki\Auth\PreAuthenticationProvider instead)
*** AbortLogin (create a MediaWiki\Auth\PreAuthenticationProvider instead)
*** AbortNewAccount (create a MediaWiki\Auth\PreAuthenticationProvider instead)
*** AddNewAccount (use LocalUserCreated instead)
*** AuthPluginSetup (create a MediaWiki\Auth\PrimaryAuthenticationProvider instead)
*** ChangePasswordForm (use AuthChangeFormFields instead, or security levels)
*** LoginUserMigrated (create a MediaWiki\Auth\PreAuthenticationProvider instead)
*** UserCreateForm (create a MediaWiki\Auth\AuthenticationProvider of some type instead)
*** UserLoginForm (create a MediaWiki\Auth\AuthenticationProvider of some type instead)
** The following hooks are removed:
*** AbortChangePassword
*** LoginPasswordResetMessage
*** PrefsPasswordAudit
** The UserLoginComplete hook will no longer be called for all logins, only for
those via the web UI. Use UserLoggedIn if you need to do something on all
logins.
** $wgRequirePasswordforEmailChange is removed.
=== New features in 1.27 ===
* $wgDataCenterUpdateStickTTL was also added. This decides how long a user
sticks to the primary DC (via cookies) after they make changes to the site.
* Added a new hook, 'UserMailerTransformContent', to transform the contents
of an email. This is similar to the EmailUser hook but applies to all mail
sent via UserMailer.
* Added a new hook, 'UserMailerTransformMessage', to transform the contents
of an emai after MIME encoding.
* Added a new hook, 'UserMailerSplitTo', to control which users have to be
emailed separately (ie. there is a single address in the To: field) so
user-specific changes to the email can be applied safely.
* $wgCdnMaxageLagged was added, which limits the CDN cache TTL
when any load balancer uses a DB that is lagged beyond the 'max lag'
setting in the relevant section of $wgLBFactoryConf.
* User::newSystemUser() may be used to simplify the creation of passwordless
"system" users for logged actions from scripts and extensions.
* Extensions can now return detailed error information via the API when
preventing user actions using 'getUserPermissionsErrors' and similar hooks
by using ApiMessage instances instead of strings for the $result value.
* $wgAPIMaxLagThreshold was added to limit bot changes when databases lag
becomes too high.
* Skins and extensions can now use FlexBox mixins (.flex-display(@display: flex)
and .flex(@grow: 1, @shrink: 1, @width: auto, @order: 1)) in Less to create
cross-browser-compatible FlexBox rules. Users will still need to add fallback
float rules or the like for compatibility with IE9- separately.
* Added MWTimestamp::getTimezoneString() which returns the localized timezone
string, if available. To localize this string, see the comments of
$wgLocaltimezone in includes/DefaultSettings.php.
* Added CentralIdLookup, a service that allows extensions needing a concept of
"central" users to get that without having to know about specific central
authentication extensions.
* $wgMaxUserDBWriteDuration added to limit huge user-generated transactions.
Regular web request transactions that takes longer than this are aborted.
* Added a new hook, 'TitleMoveCompleting', which runs before a page move is
committed.
* $wgCdnReboundPurgeDelay was added to provide secondary delayed purges of URLs
from CDN to mitigate DB replication lag and WAN cache purge lag.
* (T49162) Installer will default to setting CACHE_ACCEL as the main cache type
if it is available.
* It is now possible to patrol file uploads (both for new files and new versions
of existing files). Special:NewFiles has gained an option to filter by patrol
status. This functionality can be disabled using $wgUseFilePatrol.
* MediaWiki\Session infrastructure allows for easier use of session mechanisms
other than the usual cookies.
** SessionMetadata and SessionCheckInfo hooks allow for setting and checking
custom session metadata.
* Added MWGrants and associated configuration settings $wgGrantPermissions and
$wgGrantPermissionGroups to hold configuration for authentication features
such as OAuth that want to allow restricting the user rights a user may make
use of.
** If you're already using the OAuth extension, these new variables are
identical to (and will replace) $wgMWOAuthGrantPermissions and
$wgMWOAuthGrantPermissionGroups.
* Added MWRestrictions as a class to check restrictions on a WebRequest, e.g.
to assert that the request comes from a particular IP range.
* Added bot passwords, a rights-restricted login mechanism for API-using bots.
* Whitelisted the following HTML attributes for all elements in wikitext:
aria-describedby, aria-flowto, aria-label, aria-labelledby, aria-owns.
* Removed "presentation" restriction on the HTML role attribute in wikitext.
All values are now allowed for the role attribute.
* $wgContentHandlers now also supports callbacks to create an instance of the
appropriate ContentHandler subclass.
* Added $wgAuthenticationTokenVersion, which if non-null prevents the
user_token database field from being exposed in cookies. Setting this would
be a good idea, but will log out all current sessions.
* $wgEventRelayerConfig was added, for managing PubSub event relay configuration,
specifically for reliable CDN url purges.
* Requests have unique IDs, equal to the UNIQUE_ID environment variable (when
MediaWiki is behind Apache+mod_unique_id or something similar) or a randomly-
generated 24-character string. This request ID is used to annotate log records
and error messages. It is available client-side via mw.config.get( 'wgRequestId' ).
The request ID supplants exception IDs. Accordingly, MWExceptionHandler::getLogId()
is deprecated.
* (T33313) Add a preference for watching uploads by default, also applies
to API-based upload tools.
* $wgJpegPixelFormat was added to override chroma subsampling for JPEG image
thumbnails created via ImageMagick. Defaults to 'yuv420', providing bandwidth
savings versus the previous behavior on many files.
* MediaWiki\Auth infrastructure (called "AuthManager") allows for more flexible
configuration of multiple authentication pieces that was possible with
AuthPlugin. For example, it's now easy to plug in second-factor
authentication, or add additional checks to the login process, or to support
multiple login methods at once, or to support non-password-based login methods.
** Providers are configured via the global setting $wgAuthManagerConfig.
** A global, $wgDisableAuthManager, is temporarily available to disable
AuthManager until extensions are ready to support it.
** New hook, AuthChangeFormFields, to adjust the form fields on
AuthManager-related special pages.
** New hook, AuthManagerLoginAuthenticateAudit, for additional logging of
AuthManager-related authentication requests.
** New hook, ChangeAuthenticationDataAudit, for additional logging of
AuthManager-related authentication data changes.
** New hook, SecuritySensitiveOperationStatus, to work with the new mechanism
for requiring a recent login before taking security-sensitive operations
like changing a password.
** Two new globals, $wgChangeCredentialsBlacklist and $wgRemoveCredentialsBlacklist
can be used to prevent the web UI and the API changing certain authentication data.
* The file upload dialog (available if you install WikiEditor or VisualEditor)
can now be configured using $wgUploadDialog.
=== External library changes in 1.27 ===
==== Upgraded external libraries ====
* Updated oojs/oojs-ui from v0.12.12 to v0.13.3.
* Updated composer/semver from v1.0.0 to v1.2.0.
* Updated liuggio/statsd-php-client to 1.0.18.
* Updated QUnit from v1.18.0 to v1.22.0.
==== New external libraries ====
* Added wikimedia/base-convert v1.0.1.
* Added wikimedia/cldr-plural-rule-parser v1.0.0.
* Added wikimedia/relpath v1.0.3.
* Added wikimedia/running-stat v1.1.0.
* Added wikimedia/php-session-serializer v1.0.3.
==== Removed and replaced external libraries ====
=== Bug fixes in 1.27 ===
* Special:Upload will now display correct maximum allowed file size when running
under HHVM (T116347).
* (T54077) The APIEditBeforeSave hook will once again give only the content of
the section being edited, rather than the whole revision. This reverts the
change made in MediaWiki 1.22.
=== Action API changes in 1.27 ===
* Added list=allrevisions.
* generator=recentchanges now has the option to generate revids.
* ApiPageSet::setRedirectMergePolicy() was added. This allows generator
modules to define how generator data for a redirect source gets merged
into the redirect destination.
* prop=imageinfo&iiprop=uploadwarning will no longer include the possibility of
"was-deleted" warning.
* Added difftotextpst to query=revisions which preforms a pre-save transform on
the text before diffing it.
* Deprecated formats dbg, txt, and yaml have been removed.
* (T47988) The protect log event details now use new-style formatting.
* The following response properties from action=login are deprecated, and may
be removed in the future: lgtoken, cookieprefix, sessionid. Clients should
handle cookies to properly manage session state.
* action=login transparently allows login using bot passwords. Clients should
merely need to change the username and password used after setting up a bot
password.
* action=upload no longer understands statuskey, asyncdownload or leavemessage.
* Several changes when $wgDisableAuthManager is false:
** action=login is deprecated for uses other than bot passwords.
** list=users can now indicate if a missing username is creatable.
** action=createaccount is changed in a non-backwards-compatible manner.
** Added action=query&meta=authmanagerinfo.
** Added action=clientlogin to be used to log into the main account instead of
action=login.
** Added action=linkaccount.
** Added action=unlinkaccount.
** Added action=changeauthenticationdata.
** Added action=removeauthenticationdata.
** Added action=resetpassword.
=== Action API internal changes in 1.27 ===
* ApiQueryORM removed.
* The following classes have been removed:
** ApiFormatDbg
** ApiFormatTxt
** ApiFormatYaml
* ApiBase::addTokenProperties() was removed (deprecated since 1.24).
* ApiBase::getFinalPossibleErrors() was removed (deprecated since 1.24).
* ApiBase::getFinalResultProperties() was removed (deprecated since 1.24).
* ApiBase::getRequireAtLeastOneParameterErrorMessages() was removed (deprecated since 1.24).
* ApiBase::getPossibleErrors() was removed (deprecated since 1.24).
* ApiBase::getRequireMaxOneParameterErrorMessages() was removed (deprecated since 1.24).
* ApiBase::getRequireOnlyOneParameterErrorMessages() was removed (deprecated since 1.24).
* ApiBase::getResultProperties() was removed (deprecated since 1.24).
* ApiBase::getTitleOrPageIdErrorMessage() was removed (deprecated since 1.24).
* ApiBase::parseErrors() was removed (deprecated since 1.24).
* ApiQueryBase::titleToKey(), ApiQueryBase::keyToTitle() and
ApiQueryBase::keyPartToTitle() all removed (deprecated since 1.24).
* ApiQueryBase::checkRowCount() was removed (deprecated since 1.24).
* ApiQueryBase::getDirectionDescription() was removed (deprecated since 1.25).
* ApiQuery::getGenerators() was removed (deprecated since 1.21).
* ApiQuery::getModules() was removed (deprecated since 1.21).
* ApiQuery::getModuleType() was removed (deprecated since 1.21).
* ApiQuery::setGeneratorContinue() was removed (deprecated since 1.24).
* ApiMain::getModules() was removed (deprecated since 1.21).
* ApiBase::getVersion() was removed (deprecated since 1.21).
* ApiMain::getShowVersions() was removed (deprecated in 1.21).
* ApiMain::addModule() was removed (deprecated in 1.21).
* ApiMain::addFormat() was removed (deprecated in 1.21).
* ApiMain::getFormats() was removed (deprecated in 1.21).
* ApiPageSet::finishPageSetGeneration() was removed (deprecated in 1.21).
* ApiCreateAccount was removed.
=== Languages updated in 1.27 ===
MediaWiki supports over 350 languages. Many localisations are updated
regularly. Below only new and removed languages are listed, as well as
changes to languages because of Phabricator reports.
* (T113688) Change default numerals from Gurmukhi to Arabic for Punjabi locale.
* (T116020) Aliases of magic words in MessagesXx.php are sorted by usage.
=== Other changes in 1.27 ===
* Added dependency injection (DI) infrastructure, see docs/injection.txt for details.
It is planned to incrementally move MediaWiki code towards using DI, using the
service locator (SL) pattern as a stepping stone.
* ProfilerOutputUdp was removed. Note that there is a ProfilerOutputStats class.
* WikiPage::doDeleteArticleReal() and WikiPage::doDeleteArticle() now
ignore the 2nd and 3rd arguments (formerly $id and $commit).
* Removed "loaderScripts" option from ResourceLoaderFileModule class.
* Removed ORM-like wrapper added in 1.20.
* LinkCache::getGoodLinks and LinkCache::getBadLinks were removed
(deprecated in 1.26).
* WikiPage::doQuickEdit() was removed (deprecated since 1.21).
* Removed SiteObject and SiteArray classes (deprecated in 1.21).
* MessageBlobStore::getInstance() was removed (deprecated since 1.25).
* (T84937) Free external links ("autolinked" urls) will now be terminated
by and HTML entity encodings of  , <, and >.
* (T36948) The default file revert message's timestamp is now in
$wgLocaltimezone, instead of UTC.
* The default name of the 'suppress' group page has been changed from
'Project:Oversight' to 'Project:Suppress'.
* DatabaseBase::resultObject() is now protected (use outside Database classes
not necessary since 1.11).
* Calling ResourceLoaderFileModule::readStyleFiles() without a
ResourceLoaderContext instance is deprecated.
* ResourceLoader::getLessCompiler() now takes an optional parameter of
additional LESS variables to set for the compiler.
* wfBaseConvert() marked as deprecated, use Wikimedia\base_convert() directly
instead.
* Obsolete maintenance scripts clearCacheStats.php and showCacheStats.php
were removed. The underlying data is sent to StatsD (see $wgStatsdServer).
* Removed msg_resource_links database table and associated code.
* Removed msg_resource database table and associated code.
* Skin::getNamespaceNotice() was removed.
* wfIsConfiguredProxy() was removed (deprecated since 1.24).
* wfDebugTimer() was removed (deprecated since 1.25).
* wfIsTrustedProxy() was removed (deprecated since 1.24).
* wfGetIP() was removed (deprecated since 1.19).
* MWHookException was removed.
* OutputPage::appendSubtitle() was removed (deprecated since 1.19).
* OutputPage::loginToUse() was removed (deprecated since 1.19).
* Article::loadContent() was removed (deprecated since 1.19).
* User::editToken() was removed (deprecated since 1.19).
* Removed --force-normal option of dumpBackup.php, as it no longer served
any useful purpose since 1.22.
* The functions processOption() and processArgs() on the BackupDumper and
TextPassDumper classes have been removed.
* The maintenance/backupTextPass.inc file was deleted. You should include
maintenance/dumpTextPass.php instead.
* WikiPage::getUsedTemplates() was removed (deprecated since 1.19).
* wfEmptyMsg() was removed (deprecated since 1.18).
* OutputPage::permissionRequired() was removed (deprecated since 1.18).
* OutputPage::blockedPage() was removed (deprecated since 1.18).
* User::getSkin() was removed (deprecated since 1.18).
* OutputPage::includeJQuery() was removed (deprecated since 1.17).
* WikiPage::updateRestrictions() was removed (deprecated since 1.19).
* WikiPage::testPreSaveTransform() was removed (deprecated since 1.19).
* LogPage::logName() was removed (deprecated since 1.19).
* LogPage::logHeader() was removed (deprecated since 1.19).
* wfCheckLimits() was removed (deprecated since 1.24).
* Linker::makeKnownLinkObj() was removed (deprecated since 1.16).
* Linker::makeLinkObj() was removed (deprecated since 1.16).
* wfMsgForContentNoTrans() was removed (deprecated since 1.18).
* ChangesList::usePatrol was removed (deprecated since 1.22).
* wfMsgNoTrans() was removed (deprecated since 1.18).
* Linker::makeImageLink2 was removed (deprecated since 1.20).
* Title::userIsWatching() was removed (deprecated since 1.20).
* Removed WaitForSlave maintenance script; use SELECT MASTER_POS_WAIT()
database function directly instead.
* wfMsg() was removed (deprecated since 1.18).
* wfMsgForContent() was removed (deprecated since 1.18).
* wfMsgReal() was removed (deprecated since 1.18).
* wfMsgGetKey() was removed (deprecated since 1.18).
* wfMsgHtml() was removed (deprecated since 1.18).
* wfMsgWikiHtml() was removed (deprecated since 1.18).
* wfMsgExt() was removed (deprecated since 1.18).
* Language::armourMath() was removed (deprecated since 1.22).
* LanguageConverter::armourMath() was removed (deprecated since 1.22).
* FakeConverter::armourMath() was removed (deprecated since 1.22).
* The unused jquery.validate ResourceLoader module was removed.
* FileRepo::getRootUrl() was removed (deprecated since 1.20).
* User::generateToken() was removed (deprecated since 1.20).
* WikiPage::getRawText() was removed (deprecated since 1.21).
* ParserOutput::hasCustomDataUpdates() was removed (deprecated since 1.25).
* ParserOutput::addSecondaryDataUpdate() was removed (deprecated since 1.25).
* ParserOutput::getSecondaryDataUpdates() was removed (deprecated since 1.25).
* Gallery images with multiple caption pipes no longer concatenate them all
together but instead pick the final one, similar to image syntax.
* XML-like parser tags (such as <gallery>), when unclosed, will be left unparsed
rather than consume everything until the end of the page.
* New maintenance script resetUserEmail.php allows sysadmins to reset user emails in case
a user forgot password/account was stolen.
* wfCheckEntropy() was removed (deprecated in 1.27).
* Browser support for Internet Explorer 8 lowered from Grade A to Grade C.
* ContentHandler::supportsCategories method added. Default is true.
CategoryMembershipChangeJob updates are skipped for content that
does not support categories.
* wikidiff difference engine is no longer supported, anyone still using it are encouraged
to upgrade to wikidiff2 which is actively maintained and has better package availability.
* Database logic was removed from WatchedItem and a WatchedItemStore was created:
** WatchedItem::IGNORE_USER_RIGHTS and WatchedItem::CHECK_USER_RIGHTS were deprecated.
User::IGNORE_USER_RIGHTS and User::CHECK_USER_RIGHTS were introduced.
** WatchedItem::fromUserTitle was deprecated in favour of the constructor.
** WatchedItem::resetNotificationTimestamp was deprecated.
** WatchedItem::batchAddWatch was deprecated.
** WatchedItem::addWatch was deprecated.
** WatchedItem::removeWatch was deprecated.
** WatchedItem::isWatched was deprecated.
** WatchedItem::duplicateEntries was deprecated.
** EmailNotification::updateWatchlistTimestamp was deprecated.
** User::getWatchedItem was removed.
* Unit tests don't work with external PHPUnit anymore, Composer is now the only supported
way. Run `composer install` to install it and other dev dependencies to run unit tests.
* wl_id field added to the watchlist table.
* Revision::getRawText() was removed (deprecated since 1.21).
* WikiPage::replaceSection() was removed (deprecated since 1.21).
* Article::replaceSection() was removed (deprecated since 1.21).
* Language::getLangObj() was removed (deprecated since 1.24).
* Language::getLanguageName() was removed (deprecated since 1.20).
* Language::getLanguageNames() was removed (deprecated since 1.20).
* Language::getTranslatedLanguageNames() was removed (deprecated since 1.20).
* Language::specialPage() was removed (deprecated since 1.24).
* MediaWikiTestCase::assertException() was removed (deprecated since 1.22).
* OutputPage::getHeadItems() was removed (deprecated since 1.24).
* OutputPage::getScript() was removed (deprecated since 1.24).
* OutputPage::out() was removed (deprecated since 1.22).
* OutputPage::setAllowedModules() was removed (deprecated since 1.24).
* UserrightsPage::makeGroupNameListForLog() was removed (deprecated since 1.21).
* MediaWikiSite::newFromGlobalId() was removed (deprecated since 1.21).
* Title::newFromRedirect() was removed (deprecated since 1.21).
* Skin::commonPrintStylesheet() was removed (deprecated since 1.22).
* Skin::getCommonStylePath() was removed (deprecated since 1.24).
* Skin::newFromKey() was removed (deprecated since 1.24).
* Skin::getUsableSkins() was removed (deprecated since 1.23).
* LoadBalancer::pickRandom() was removed (deprecated in 1.21).
* Article::getUndoText() and WikiPage::getUndoText were removed (deprecated since
1.21).
* DifferenceEngine::setText() was removed (deprecated in 1.21).
* Title::newFromRedirectArray() was removed (deprecated in 1.21).
* UserMailer::send() no longer accepts $replyto as the 5th argument and $contentType
as the 6th. These must be passed in the options array now.
* Title::newFromRedirectRecurse() was removed (deprecated in 1.21).
* Skin::accesskey was removed (deprecated since 1.21).
* Skin::blockLink was removed (deprecated since 1.21).
* Skin::buildRollbackLink was removed (deprecated since 1.21).
* Skin::emailLink was removed (deprecated since 1.21).
* Skin::formatComment was removed (deprecated since 1.21).
* Skin::formatHiddenCategories was removed (deprecated since 1.21).
* Skin::formatLinksInComment was removed (deprecated since 1.21).
* Skin::formatRevisionSize was removed (deprecated since 1.21).
* Skin::formatSize was removed (deprecated since 1.21).
* Skin::formatTemplates was removed (deprecated since 1.21).
* Skin::generateTOC was removed (deprecated since 1.21).
* Skin::getInternalLinkAttributes was removed (deprecated since 1.21).
* Skin::getInternalLinkAttributesObj was removed (deprecated since 1.21).
* Skin::getInterwikiLinkAttributes was removed (deprecated since 1.21).
* Skin::getInvalidTitleDescription was removed (deprecated since 1.21).
* Skin::getLinkColour was removed (deprecated since 1.21).
* Skin::getRevDeleteLink was removed (deprecated since 1.21).
* Skin::getRollbackEditCount was removed (deprecated since 1.21).
* Skin::makeBrokenImageLinkObj was removed (deprecated since 1.21).
* Skin::makeCommentLink was removed (deprecated since 1.21).
* Skin::makeExternalImage was removed (deprecated since 1.21).
* Skin::makeExternalLink was removed (deprecated since 1.21).
* Skin::makeHeadline was removed (deprecated since 1.21).
* Skin::makeImageLink was removed (deprecated since 1.21).
* Skin::makeMediaLinkFile was removed (deprecated since 1.21).
* Skin::makeMediaLinkObj was removed (deprecated since 1.21).
* Skin::makeSelfLinkObj was removed (deprecated since 1.21).
* Skin::makeThumbLink2 was removed (deprecated since 1.21).
* Skin::makeThumbLinkObj was removed (deprecated since 1.21).
* Skin::normaliseSpecialPage was removed (deprecated since 1.21).
* Skin::normalizeSubpageLink was removed (deprecated since 1.21).
* Skin::processResponsiveImages was removed (deprecated since 1.21).
* Skin::revComment was removed (deprecated since 1.21).
* Skin::revDeleteLink was removed (deprecated since 1.21).
* Skin::revDeleteLinkDisabled was removed (deprecated since 1.21).
* Skin::revUserLink was removed (deprecated since 1.21).
* Skin::revUserTools was removed (deprecated since 1.21).
* Skin::specialLink was removed (deprecated since 1.21).
* Skin::splitTrail was removed (deprecated since 1.21).
* Skin::titleAttrib was removed (deprecated since 1.21).
* Skin::tocIndent was removed (deprecated since 1.21).
* Skin::tocLine was removed (deprecated since 1.21).
* Skin::tocLineEnd was removed (deprecated since 1.21).
* Skin::tocList was removed (deprecated since 1.21).
* Skin::tocUnindent was removed (deprecated since 1.21).
* Skin::tooltip was removed (deprecated since 1.21).
* Skin::tooltipAndAccesskeyAttribs was removed (deprecated since 1.21).
* Skin::userTalkLink was removed (deprecated since 1.21).
* Skin::userToolLinksRedContribs was removed (deprecated since 1.21).
* wikidiff3 is now the default and only PHP diff engine. It provides improved diff
performance on complex changes. $wgExternalDiffEngine = 'wikidiff3' therefore
makes no difference now. Users are still recommended to use wikidiff2 if possible,
though.
* User::addNewUserLogEntry() was deprecated.
* User::addNewUserLogEntryAutoCreate() was deprecated.
* User::isPasswordReminderThrottled() was deprecated.
* Bot-oriented parameters to Special:UserLogin (wpCookieCheck, wpSkipCookieCheck)
were removed.
* Installer can now be customized without patching MediaWiki code, see
mw-config/overrides/README for details.
=== Compatibility ===
MediaWiki 1.27 requires PHP 5.5.9 or later. There is experimental support for
HHVM 3.6.5 or later.
MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
support for them is somewhat less mature. There is experimental support for
Oracle and Microsoft SQL Server.
The supported versions are:
* MySQL 5.0.3 or later
* PostgreSQL 8.3 or later
* SQLite 3.3.7 or later
* Oracle 9.0.1 or later
* Microsoft SQL Server 2005 (9.00.1399)
=== Upgrading ===
1.27 has several database changes since 1.26, and will not work without schema
updates. Note that due to changes to some very large tables like the revision
table, the schema update may take quite long (minutes on a medium sized site,
many hours on a large site).
If upgrading from before 1.11, and you are using a wiki as a commons
repository, make sure that it is updated as well. Otherwise, errors may arise
due to database schema changes.
If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
new database fields are filled with data.