it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
=== PHP 5.2 now required ==
-In 1.18, the lowest supported version of MediaWiki is now 5.2.x. Please upgrade
+In 1.18, the lowest supported version of MediaWiki is now 5.2.3. Please upgrade
PHP if you have not done so prior to upgrading MediaWiki.
=== Configuration changes in 1.18 ===
$wgLegacyEncoding set.
* (bug 27508) Add $wgSVGMetadataCutoff to limit the maximum amount of an svg we
look at when finding metadata to prevent excessive resource usage.
+* $wgSysopUserBans and $wgSysopRangeBans (deprecated in 1.17) are now removed.
+ Use $wgBlockCIDRLimit = array( 'IPv4' => 43, 'IPv6' => 128 ) to achieve the same
+ functionality as $wgSysopRangeBans; you can use the BlockIp hook to replicate
+ $wgSysopUserBans functionality.
+* The options on the block form have been standardised such that checking a box
+ makes the block 'more serious'; so while "check to prevent account creation" and
+ "check to enable autoblock" remain the same, "check to allow user-talk edit" is
+ reversed to "check to *disable* user-talk edit", and "check to block anon-only"
+ becomes "check to block logged-in users too". The default settings remain the same.
+* Most of the field names on the Special:Block form have been changed, which will
+ probably break screen-scraping bots.
=== New features in 1.18 ===
* Added a special page, disabled by default, that allows users with the
differently (italicized by default) on Special:SpecialPages
* Added $wgAggregateStatsID, which allows UDP stats to be aggregated over
several wikis.
+* When $wgAllowMicrodataAttributes is true, all itemtypes are allowed, not just
+ the three that were defined in the original specification.
+* (bug 14706) Added support for the Imagick PHP extension.
+* (bug 18691) Added support for SVG rasterization using the Imagick PHP
+ extension
+* (bug 2581, bug 6834) Added links to thumbnail in several resolutions to the
+ file description page. The sizes are set by $wgImageLimits.
+* (bug 28031) Add pageCount support to ArchivedFile
+* (bug 27924) PhpHttpRequest doesn't return response body if HTTP != 200
+* Added hook BitmapHandlerTransform to allow extension to transform a file
+ without overriding the entire handler.
=== Bug fixes in 1.18 ===
* (bug 23119) WikiError class and subclasses are now marked as deprecated
* Do not show enotifminoredits preference, if disabled by $wgEnotifMinorEdits.
* AbortLogin returning "ABORTED" now handled. Also allows message identifier
for "ABORTED" reason to be returned and displayed to user.
+* (bug 28034) uploading file to local wiki when file exists on shared repository
+ (commons) gives spurious info in the warning message
+* Usernames get lost when selecting different sorts on Special:listfiles
+* (bug 14005) editing section 0 of an existing but empty page gives no such
+ section error
+* (bug 26939) Installer does not set $wgMetaNamespace
=== API changes in 1.18 ===
* (bug 26339) Throw warning when truncating an overlarge API result
* (bug 27897) list=allusers and list=users list hidden users
* (bug 27717) API's exturlusage module does not respect $wgMiserMode
* (bug 27588) list=filearchive&faprop=sha1 returns empty attribute
+* (bug 28010) Passing a non existant user to list=users gives internal error
+* (bug 27549) action=query&list=users&usprop=groups doesn't show implicit
+ groups if a user doesn't have explicit groups
+* (bug 27670) Ordering by timestamp (and usage of start and end) isn't as clear
+ in auto generated document, as it is on mw.org
+* (bug 27182) API: Add filter by prefix for meta=allmessages
+* (bug 27183) API: Add filter by customisation state for meta=allmessages
+* (bug 27340) API: Allow listing of "small" categories
+* (bug 27342) Add audir param to list=allusers
+* (bug 27203) add fato param to list=filearchive
+* (bug 27341) Add drto param to list=deletedrevs
+* (bug 26630) Add api for Special:ActiveUsers
+* (bug 27020) API: Allow title prefix search of logevents (only when not in
+ miser mode)
+* (bug 26629) add Special:MIMESearch to api
+* (bug 27585) add pagecount to list=filearchive
+* (bug 28104) Namespace for local pages in interwiki backlinks (iwbacklinks)
+ is missing
+* (bug 27343) Add parseddescription to list=filearchive
+* (bug 27469) label implicit groups in list=allusers&auprop=groups/
+ list=users&usprop=groups
+* Addition of APIQuerySiteInfoGeneralInfo hook to add extra information to
+ the general site info results
+* (bug 16288) API: consider making closure status of wikis more clear
+ with meta=siteinfo
+* (bug 27589) list=allimages&aiprop=archivename is useless
+* (bug 27586) Remove duplication of props in ApiQueryStashImageInfo
+ by using ApiQueryImageInfo
=== Languages updated in 1.18 ===
* (bug 27681) Set $namespaceGenderAliases for Portuguese (pt and pt-br)
* (bug 27785) Fallback language for Kabardian (kbd) is English now.
* (bug 27825) Raw watchlist edit message now uses formatted numbers.
+* (bug 28040) Turkish: properly lower case 'I' to 'ı' (dotless i) and
+ uppercase 'i' to 'İ' (dotted i)
== Compatibility ==
-MediaWiki 1.18 requires PHP 5.1 (5.2 recommended). PHP 4 is no longer
-supported.
+MediaWiki 1.18 requires PHP 5.2.3. PHP 4 is no longer supported.
MySQL 3.23.x is no longer supported; some older hosts may need to upgrade.
At this time we still recommend 4.0, but 4.1/5.0 will work fine in most cases.