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 * $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
  49 === New features in 1.27 ===
  50 * $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
  51   basic configuration settings needed for multi-datacenter setups.
  52   $wgDataCenterUpdateStickTTL was also added.
  53 * Added a new hook, 'UserMailerTransformContent', to transform the contents
  54   of an email. This is similar to the EmailUser hook but applies to all mail
  55   sent via UserMailer.
  56 * Added a new hook, 'UserMailerTransformMessage', to transform the contents
  57   of an emai after MIME encoding.
  58 * Added a new hook, 'UserMailerSplitTo', to control which users have to be
  59   emailed separately (ie. there is a single address in the To: field) so
  60   user-specific changes to the email can be applied safely.
  61 * $wgCdnMaxageLagged was added, which limits the CDN cache TTL
  62   when any load balancer uses a DB that is lagged beyond the 'max lag'
  63   setting in the relevant section of $wgLBFactoryConf.
  64 * User::newSystemUser() may be used to simplify the creation of passwordless
  65   "system" users for logged actions from scripts and extensions.
  66
  67 ==== External libraries ====
  68
  69 === Bug fixes in 1.27 ===
  70
  71 === Action API changes in 1.27 ===
  72 * Added list=allrevisions.
  73 * generator=recentchanges now has the option to generate revids.
  74 * ApiPageSet::setRedirectMergePolicy() was added. This allows generator
  75   modules to define how generator data for a redirect source gets merged
  76   into the redirect destination.
  77 * prop=imageinfo&iiprop=uploadwarning will no longer include the possibility of
  78   "was-deleted" warning.
  79 * Added difftotextpst to query=revisions which preforms a pre-save transform on
  80   the text before diffing it.
  81
  82 === Action API internal changes in 1.27 ===
  83 * ApiQueryORM removed.
  84
  85 === Languages updated in 1.27 ===
  86
  87 MediaWiki supports over 350 languages. Many localisations are updated
  88 regularly. Below only new and removed languages are listed, as well as
  89 changes to languages because of Bugzilla reports.
  90
  91 === Other changes in 1.27 ===
  92 * ProfilerOutputUdp was removed. Note that there is a ProfilerOutputStats class.
  93
  94 == Compatibility ==
  95
  96 MediaWiki 1.27 requires PHP 5.3.3 or later. There is experimental support for
  97 HHVM 3.3.0.
  98
  99 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
 100 support for them is somewhat less mature. There is experimental support for
 101 Oracle and Microsoft SQL Server.
 102
 103 The supported versions are:
 104
 105 * MySQL 5.0.3 or later
 106 * PostgreSQL 8.3 or later
 107 * SQLite 3.3.7 or later
 108 * Oracle 9.0.1 or later
 109 * Microsoft SQL Server 2005 (9.00.1399)
 110
 111 == Upgrading ==
 112
 113 1.27 has several database changes since 1.26, and will not work without schema
 114 updates. Note that due to changes to some very large tables like the revision
 115 table, the schema update may take quite long (minutes on a medium sized site,
 116 many hours on a large site).
 117
 118 If upgrading from before 1.11, and you are using a wiki as a commons
 119 repository, make sure that it is updated as well. Otherwise, errors may arise
 120 due to database schema changes.
 121
 122 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
 123 new database fields are filled with data.
 124
 125 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
 126 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
 127 with MediaWiki 1.21.
 128
 129 Don't forget to always back up your database before upgrading!
 130
 131 See the file UPGRADE for more detailed upgrade instructions.
 132
 133 For notes on 1.26.x and older releases, see HISTORY.
 134
 135 == Online documentation ==
 136
 137 Documentation for both end-users and site administrators is available on
 138 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 139 for pages that explicitly state that their contents are in the public domain):
 140
 141        https://www.mediawiki.org/wiki/Documentation
 142
 143 == Mailing list ==
 144
 145 A mailing list is available for MediaWiki user support and discussion:
 146
 147        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 148
 149 A low-traffic announcements-only list is also available:
 150
 151        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 152
 153 It's highly recommended that you sign up for one of these lists if you're
 154 going to run a public MediaWiki, so you can be notified of security fixes.
 155
 156 == IRC help ==
 157
 158 There's usually someone online in #mediawiki on irc.freenode.net.