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
  45 ==== External libraries ====
  46
  47 === Bug fixes in 1.27 ===
  48
  49 === Action API changes in 1.27 ===
  50 * Added list=allrevisions.
  51 * generator=recentchanges now has the option to generate revids.
  52 * ApiPageSet::setRedirectMergePolicy() was added. This allows generator
  53   modules to define how generator data for a redirect source gets merged
  54   into the redirect destination.
  55
  56 === Action API internal changes in 1.27 ===
  57
  58 === Languages updated in 1.27 ===
  59
  60 MediaWiki supports over 350 languages. Many localisations are updated
  61 regularly. Below only new and removed languages are listed, as well as
  62 changes to languages because of Bugzilla reports.
  63
  64 === Other changes in 1.27 ===
  65
  66 == Compatibility ==
  67
  68 MediaWiki 1.27 requires PHP 5.3.3 or later. There is experimental support for
  69 HHVM 3.3.0.
  70
  71 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
  72 support for them is somewhat less mature. There is experimental support for
  73 Oracle and Microsoft SQL Server.
  74
  75 The supported versions are:
  76
  77 * MySQL 5.0.3 or later
  78 * PostgreSQL 8.3 or later
  79 * SQLite 3.3.7 or later
  80 * Oracle 9.0.1 or later
  81 * Microsoft SQL Server 2005 (9.00.1399)
  82
  83 == Upgrading ==
  84
  85 1.27 has several database changes since 1.26, and will not work without schema
  86 updates. Note that due to changes to some very large tables like the revision
  87 table, the schema update may take quite long (minutes on a medium sized site,
  88 many hours on a large site).
  89
  90 If upgrading from before 1.11, and you are using a wiki as a commons
  91 repository, make sure that it is updated as well. Otherwise, errors may arise
  92 due to database schema changes.
  93
  94 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
  95 new database fields are filled with data.
  96
  97 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
  98 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
  99 with MediaWiki 1.21.
 100
 101 Don't forget to always back up your database before upgrading!
 102
 103 See the file UPGRADE for more detailed upgrade instructions.
 104
 105 For notes on 1.26.x and older releases, see HISTORY.
 106
 107 == Online documentation ==
 108
 109 Documentation for both end-users and site administrators is available on
 110 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 111 for pages that explicitly state that their contents are in the public domain):
 112
 113        https://www.mediawiki.org/wiki/Documentation
 114
 115 == Mailing list ==
 116
 117 A mailing list is available for MediaWiki user support and discussion:
 118
 119        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 120
 121 A low-traffic announcements-only list is also available:
 122
 123        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 124
 125 It's highly recommended that you sign up for one of these lists if you're
 126 going to run a public MediaWiki, so you can be notified of security fixes.
 127
 128 == IRC help ==
 129
 130 There's usually someone online in #mediawiki on irc.freenode.net.