* $wgSkipSkin, which has been replaceable by $wgSkipSkins since 2005 (r9249), is
now formally deprecated.
* Removed deprecated $wgDisabledActions as it is hardly used anywhere.
+* $wgRateLimitLog has been deprecated and replaced by
+ $wgDebugLogGroup['ratelimit'].
+* $wgLocalInterwikis is an array containing multiple local interwiki prefixes
+ (interwiki prefixes that point back to the current wiki). This effectively
+ allows more than one value of $wgLocalInterwiki to be specified and
+ understood by the parser. The value of $wgLocalInterwiki is automatically
+ prepended to the start of this array.
=== New features in 1.23 ===
* ResourceLoader can utilize the Web Storage API to cache modules client-side.
$wgPasswordExpirationDays configuration setting.
* Add new hook SendWatchlistEmailNotification, this will be used to determine
whether to send a watchlist email notification.
+* (bug 42026) Special:Contributions now includes an option to filter page
+ creations, similar to the topOnly option.
+* Add mediawiki.ui.button styling to all pages so wiki content can use styled
+ buttons.
+* Special:UserLogin/signup now does AJAX checks for invalid and taken usernames,
+ displaying the error live.
+* Added BaseTemplateAfterPortlet hook to allow injecting html after portlets in skins.
=== Bug fixes in 1.23 ===
* (bug 41759) The "updated since last visit" markers (on history pages, recent
message instead of leading the user to make a null edit.
* (bug 52659) mediawiki.notification: Notification area remained visible when
empty and thus was stealing pointer events from links on the page.
+* (bug 26811) When a DBUnexpectedError occurs, DB server hostnames are now
+ hidden unless $wgShowExceptionDetails is true, and $wgShowDBErrorBacktrace
+ no longer applies in such cases.
+* (bug 60960) Avoid doing file_exist() checks on data: URIs, as they cause
+ warnings to be printed on Windows due to large path length.
=== Web API changes in 1.23 ===
* (bug 54884) action=parse&prop=categories now indicates hidden and missing
* Added llprop=langname and llprop=autonym for action=query&prop=langlinks.
* prop=redirects is added, to return redirects to the pages in the query.
* list=allredirects is added, to list all redirects pointing to a namespace.
+* (bug 42026) Added ucshow={new,!new,top,!top} to list=usercontribs.
+ Also added newonly to action=feedcontributions.
+* (bug 42026) Deprecated uctoponly in favor of ucshow=top.
=== Languages updated in 1.23 ===
object expects this column to exist. Use update.php to create this new field.
* The jquery.delayedBind ResourceLoader module was deprecated in favor of the
jquery.throttle-debounce module. It will be removed in MediaWiki 1.24.
+* mw.user.bucket has been deprecated.
+* On Special:PrefixIndex, a table#mw-prefixindex-list-table was changed to
+ table.mw-prefixindex-list-table to avoid duplicate ids when the special page
+ is transcluded.
+* (bug 62198) window.$j has been deprecated.
+* Preference "Disable link title conversion" was removed.
+* SpecialRecentChanges no longer includes any functionality for generating feeds
+ - it has been factored out to ApiFeedRecentChanges. Old URLs redirect to new
+ ones.
+* RecentChange::mExtra['lang'] is no longer set and should no longer be used.
+ Extensions should read from other configuration variables, including
+ $wgLocalInterwikis, to identify the current wiki.
+* Sections in the parser test framework have been renamed and the old
+ section names are deprecated. Please use "!!wikitext" and "!!html"
+ (or "!!html/php") instead of "!!input" and "!!result". This allows
+ us to extend parser tests to accommodate additional input/output
+ pairs, such as "!!html/parsoid" (for the output of the Parsoid
+ parser, where it differs from the PHP parser).
==== Removed classes ====
* FakeMemCachedClient (deprecated in 1.18)