* ctype
* iconv
* json
-* mbstring
+* 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,
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
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 ===
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.
* 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 is deprecated, and will be removed soon.
=== Languages updated in 1.27 ===
* 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.
== Compatibility ==