RELEASE-NOTES-1.27

   1 Security reminder: If you have PHP's register_globals option set, you must
   2 turn it off. MediaWiki will not work with it enabled.
   3
   4 == MediaWiki 1.27 ==
   5
   6 THIS IS NOT A RELEASE YET
   7
   8 MediaWiki 1.27 is an alpha-quality branch and is not recommended for use in
   9 production.
  10
  11 === Configuration changes in 1.27 ===
  12 * Removed $wgUseLinkNamespaceDBFields
  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 * $wgRemoteUploadTarget (added in 1.26) removed, replaced by $wgForeignUploadTargets
  20 * $wgUseXVO has been removed, as it provides functionality only used by
  21   custom Wikimedia patches against Squid 2.x that probably noone uses in
  22   production anymore. There is now $wgUseKeyHeader that provides similar
  23   functionality but instead of the MediaWiki-specific X-Vary-Options header,
  24   uses the draft Key header standard.
  25 * $wgScriptExtension (and support for '.php5' entry points) was removed. See the
  26   deprecation notice in the release notes for version 1.25 for advice on how to
  27   preserve support for '.php5' entry points via URL rewriting.
  28
  29 === New features in 1.27 ===
  30 * $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
  31   basic configuration settings needed for multi-datacenter setups.
  32   $wgDataCenterUpdateStickTTL was also added.
  33 * Added a new hook, 'UserMailerTransformContent', to transform the contents
  34   of an email. This is similar to the EmailUser hook but applies to all mail
  35   sent via UserMailer.
  36 * Added a new hook, 'UserMailerTransformMessage', to transform the contents
  37   of an emai after MIME encoding.
  38 * Added a new hook, 'UserMailerSplitTo', to control which users have to be
  39   emailed separately (ie. there is a single address in the To: field) so
  40   user-specific changes to the email can be applied safely.
  41 * $wgCdnMaxageLagged was added, which limits the CDN cache TTL
  42   when any load balancer uses a DB that is lagged beyond the 'max lag'
  43   setting in the relevant section of $wgLBFactoryConf.
  44 * Added several JavaScript libraries for uploading files to MediaWiki
  45   from the client-side. See documentation for mw.Upload and its
  46   subclasses for more information.
  47 * Added OOUI dialogs and layout for file upload interfaces. See
  48   documentation for mw.Upload.Dialog, mw.Upload.BookletLayout and its
  49   subclasses for more information.
  50
  51 ==== External libraries ====
  52
  53 === Bug fixes in 1.27 ===
  54
  55 === Action API changes in 1.27 ===
  56 * Added list=allrevisions.
  57 * generator=recentchanges now has the option to generate revids.
  58 * ApiPageSet::setRedirectMergePolicy() was added. This allows generator
  59   modules to define how generator data for a redirect source gets merged
  60   into the redirect destination.
  61 * prop=imageinfo&iiprop=uploadwarning will no longer include the possibility of
  62   "was-deleted" warning.
  63
  64 === Action API internal changes in 1.27 ===
  65
  66 === Languages updated in 1.27 ===
  67
  68 MediaWiki supports over 350 languages. Many localisations are updated
  69 regularly. Below only new and removed languages are listed, as well as
  70 changes to languages because of Bugzilla reports.
  71
  72 === Other changes in 1.27 ===
  73
  74 == Compatibility ==
  75
  76 MediaWiki 1.27 requires PHP 5.3.3 or later. There is experimental support for
  77 HHVM 3.3.0.
  78
  79 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
  80 support for them is somewhat less mature. There is experimental support for
  81 Oracle and Microsoft SQL Server.
  82
  83 The supported versions are:
  84
  85 * MySQL 5.0.3 or later
  86 * PostgreSQL 8.3 or later
  87 * SQLite 3.3.7 or later
  88 * Oracle 9.0.1 or later
  89 * Microsoft SQL Server 2005 (9.00.1399)
  90
  91 == Upgrading ==
  92
  93 1.27 has several database changes since 1.26, and will not work without schema
  94 updates. Note that due to changes to some very large tables like the revision
  95 table, the schema update may take quite long (minutes on a medium sized site,
  96 many hours on a large site).
  97
  98 If upgrading from before 1.11, and you are using a wiki as a commons
  99 repository, make sure that it is updated as well. Otherwise, errors may arise
 100 due to database schema changes.
 101
 102 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
 103 new database fields are filled with data.
 104
 105 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
 106 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
 107 with MediaWiki 1.21.
 108
 109 Don't forget to always back up your database before upgrading!
 110
 111 See the file UPGRADE for more detailed upgrade instructions.
 112
 113 For notes on 1.26.x and older releases, see HISTORY.
 114
 115 == Online documentation ==
 116
 117 Documentation for both end-users and site administrators is available on
 118 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 119 for pages that explicitly state that their contents are in the public domain):
 120
 121        https://www.mediawiki.org/wiki/Documentation
 122
 123 == Mailing list ==
 124
 125 A mailing list is available for MediaWiki user support and discussion:
 126
 127        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 128
 129 A low-traffic announcements-only list is also available:
 130
 131        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 132
 133 It's highly recommended that you sign up for one of these lists if you're
 134 going to run a public MediaWiki, so you can be notified of security fixes.
 135
 136 == IRC help ==
 137
 138 There's usually someone online in #mediawiki on irc.freenode.net.