1 Security reminder: If you have PHP's register_globals option set, you must
2 turn it off. MediaWiki will not work with it enabled.
6 THIS IS NOT A RELEASE YET
8 MediaWiki 1.27 is an alpha-quality branch and is not recommended for use in
11 === Configuration changes in 1.27 ===
12 * $wgUseLinkNamespaceDBFields was removed.
13 * Deprecated $wgResourceLoaderMinifierStatementsOnOwnLine and
14 $wgResourceLoaderMinifierMaxLineLength, because there was little value in
15 making the behavior configurable. The default values (`false` for the former,
16 1000 for the latter) are now hard-coded.
17 * $wgDebugDumpSqlLength was removed (deprecated in 1.24).
18 * $wgDebugDBTransactions was removed (deprecated in 1.20).
19 * $wgUseXVO has been removed, as it provides functionality only used by
20 custom Wikimedia patches against Squid 2.x that probably noone uses in
21 production anymore. There is now $wgUseKeyHeader that provides similar
22 functionality but instead of the MediaWiki-specific X-Vary-Options header,
23 uses the draft Key header standard.
24 * $wgScriptExtension (and support for '.php5' entry points) was removed. See the
25 deprecation notice in the release notes for version 1.25 for advice on how to
26 preserve support for '.php5' entry points via URL rewriting.
27 * Password handling via the User object has been deprecated and partially
28 removed, pending the future introduction of AuthManager. In particular:
29 ** expirePassword(), getPasswordExpireDate(), resetPasswordExpiration(), and
30 getPasswordExpired() have been removed. They were unused outside of core.
31 ** The mPassword, mNewpassword, mNewpassTime, and mPasswordExpires fields are
32 now private and will be removed in the future.
33 ** The getPassword() and getTemporaryPassword() methods now throw
34 BadMethodCallException and will be removed in the future.
35 ** The ability to pass 'password' and 'newpassword' to createNew() has been
36 removed. The only users of it seem to have been using it to set invalid
37 passwords, and so shouldn't be greatly affected.
38 ** setPassword(), setInternalPassword(), and setNewpassword() have been
39 deprecated, pending the introduction of AuthManager.
40 ** User::randomPassword() is deprecated in favor of a new method
41 PasswordFactory::generateRandomPasswordString()
42 ** User::getPasswordFactory() is deprecated, callers should just create a
43 PasswordFactory themselves.
44 ** A new constructor, User::newSystemUser(), has been added to simplify the
45 creation of passwordless "system" users for logged actions.
46 * $wgMaxSquidPurgeTitles was removed.
47 * $wgAjaxWatch was removed. This is now enabled by default.
48 * $wgUseInstantCommons now hotlinks Commons images by default instead of
49 downloading originals and thumbnailing them locally. This allows wikis to save
50 on CPU and bandwidth while reducing time to first byte for pages, even without
51 a thumbnail handler. See $wgForeignFileRepos documentation for tweaks.
52 * (T27397) WebP is enabled by default as an uploadable filetype.
53 * (T48998) $wgArticlePath must now be either a full url, or start with a "/".
54 * $wgRateLimitLog was removed; use $wgDebugLogGroups['ratelimit'] instead.
56 === New features in 1.27 ===
57 * $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
58 basic configuration settings needed for multi-datacenter setups.
59 $wgDataCenterUpdateStickTTL was also added.
60 * Added a new hook, 'UserMailerTransformContent', to transform the contents
61 of an email. This is similar to the EmailUser hook but applies to all mail
63 * Added a new hook, 'UserMailerTransformMessage', to transform the contents
64 of an emai after MIME encoding.
65 * Added a new hook, 'UserMailerSplitTo', to control which users have to be
66 emailed separately (ie. there is a single address in the To: field) so
67 user-specific changes to the email can be applied safely.
68 * $wgCdnMaxageLagged was added, which limits the CDN cache TTL
69 when any load balancer uses a DB that is lagged beyond the 'max lag'
70 setting in the relevant section of $wgLBFactoryConf.
71 * User::newSystemUser() may be used to simplify the creation of passwordless
72 "system" users for logged actions from scripts and extensions.
73 * Extensions can now return detailed error information via the API when
74 preventing user actions using 'getUserPermissionsErrors' and similar hooks
75 by using ApiMessage instances instead of strings for the $result value.
76 * $wgAPIMaxLagThreshold was added to limit bot changes when databases lag
78 * Skins and extensions can now use FlexBox mixins (.flex-display(@display: flex)
79 and .flex(@grow: 1, @shrink: 1, @width: auto, @order: 1)) in Less to create
80 cross-browser-compatible FlexBox rules. Users will still need to add fallback
81 float rules or the like for compatibility with IE9- separately.
83 ==== External libraries ====
85 === Bug fixes in 1.27 ===
86 * Special:Upload will now display correct maximum allowed file size when running
89 === Action API changes in 1.27 ===
90 * Added list=allrevisions.
91 * generator=recentchanges now has the option to generate revids.
92 * ApiPageSet::setRedirectMergePolicy() was added. This allows generator
93 modules to define how generator data for a redirect source gets merged
94 into the redirect destination.
95 * prop=imageinfo&iiprop=uploadwarning will no longer include the possibility of
96 "was-deleted" warning.
97 * Added difftotextpst to query=revisions which preforms a pre-save transform on
98 the text before diffing it.
100 === Action API internal changes in 1.27 ===
101 * ApiQueryORM removed.
103 === Languages updated in 1.27 ===
105 MediaWiki supports over 350 languages. Many localisations are updated
106 regularly. Below only new and removed languages are listed, as well as
107 changes to languages because of Bugzilla reports.
109 * (T113688) Change default numerals from Gurmukhi to Arabic for Punjabi locale.
111 === Other changes in 1.27 ===
112 * ProfilerOutputUdp was removed. Note that there is a ProfilerOutputStats class.
113 * WikiPage::doDeleteArticleReal() and WikiPage::doDeleteArticle() now
114 ignore the 2nd and 3rd arguments (formerly $id and $commit).
115 * Removed "loaderScripts" option from ResourceLoaderFileModule class.
116 * Removed ORM-like wrapper added in 1.20.
117 * LinkCache::getGoodLinks and LinkCache::getBadLinks were removed (deprecated in 1.26).
118 * WikiPage::doQuickEdit() was removed (deprecated since 1.21).
119 * Removed SiteObject and SiteArray classes (deprecated in 1.21).
120 * MessageBlobStore::getInstance() was removed (deprecated since 1.25).
124 MediaWiki 1.27 requires PHP 5.3.3 or later. There is experimental support for
127 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
128 support for them is somewhat less mature. There is experimental support for
129 Oracle and Microsoft SQL Server.
131 The supported versions are:
133 * MySQL 5.0.3 or later
134 * PostgreSQL 8.3 or later
135 * SQLite 3.3.7 or later
136 * Oracle 9.0.1 or later
137 * Microsoft SQL Server 2005 (9.00.1399)
141 1.27 has several database changes since 1.26, and will not work without schema
142 updates. Note that due to changes to some very large tables like the revision
143 table, the schema update may take quite long (minutes on a medium sized site,
144 many hours on a large site).
146 If upgrading from before 1.11, and you are using a wiki as a commons
147 repository, make sure that it is updated as well. Otherwise, errors may arise
148 due to database schema changes.
150 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
151 new database fields are filled with data.
153 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
154 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
157 Don't forget to always back up your database before upgrading!
159 See the file UPGRADE for more detailed upgrade instructions.
161 For notes on 1.26.x and older releases, see HISTORY.
163 == Online documentation ==
165 Documentation for both end-users and site administrators is available on
166 MediaWiki.org, and is covered under the GNU Free Documentation License (except
167 for pages that explicitly state that their contents are in the public domain):
169 https://www.mediawiki.org/wiki/Documentation
173 A mailing list is available for MediaWiki user support and discussion:
175 https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
177 A low-traffic announcements-only list is also available:
179 https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
181 It's highly recommended that you sign up for one of these lists if you're
182 going to run a public MediaWiki, so you can be notified of security fixes.
186 There's usually someone online in #mediawiki on irc.freenode.net.