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2016-11-28 20:20
api
[ DIR ]
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[ DIR ]
drwxr-xr-x
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.htaccess
197
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Action.php
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AjaxDispatcher.php
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AjaxResponse.php
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Article.php
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AuthPlugin.php
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AutoLoader.php
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Autopromote.php
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BacklinkCache.php
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Block.php
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Category.php
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CategoryFinder.php
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CategoryPage.php
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CategoryViewer.php
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Categoryfinder.php
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2011-05-19 02:03
Cdb.php
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Cdb_PHP.php
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2011-05-28 19:51
ChangeTags.php
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2011-07-09 11:01
ChangesFeed.php
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2011-06-19 07:45
ChangesList.php
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2011-10-25 23:51
Collation.php
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ConfEditor.php
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Cookie.php
6.17
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CryptRand.php
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DefaultSettings.php
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Defines.php
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DeprecatedGlobal.php
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DerivativeRequest.php
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DjVuImage.php
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DummyLinker.php
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EditPage.php
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EventRelayerGroup.php
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Exception.php
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Export.php
32.27
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ExternalEdit.php
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ExternalStore.php
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ExternalStoreDB.php
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ExternalStoreHttp.php
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ExternalUser.php
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FakeTitle.php
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Fallback.php
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2011-05-28 20:58
FauxRequest.php
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Feed.php
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FeedUtils.php
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FileDeleteForm.php
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ForkController.php
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FormOptions.php
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GenderCache.php
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GitInfo.php
10.74
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GlobalFunctions.php
106.76
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HTMLForm.php
49.55
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2011-11-09 18:04
HistoryBlob.php
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HistoryPage.php
21.66
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Hooks.php
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Html.php
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HtmlFormatter.php
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HttpFunctions.old.php
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HttpFunctions.php
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IP.php
21.58
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2011-11-09 16:00
ImageFunctions.php
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ImageGallery.php
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2011-07-16 01:18
ImagePage.php
36
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2011-07-11 02:39
ImageQueryPage.php
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Import.php
33.63
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Init.php
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Licenses.php
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LinkFilter.php
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Linker.php
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LinksUpdate.php
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2011-11-14 21:58
ListToggle.php
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LocalisationCache.php
29.31
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LogEventsList.php
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2011-07-10 20:12
LogPage.php
16.09
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MWFunction.php
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MWGrants.php
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MWNamespace.php
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MWTimestamp.php
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MagicWord.php
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MagicWordArray.php
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MediaWiki.php
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MediaWikiServices.php
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MediaWikiVersionFetcher.php
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MergeHistory.php
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Message.php
32.49
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MessageBlobStore.php
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2011-05-28 00:42
Metadata.php
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MimeMagic.php
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MovePage.php
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Namespace.php
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2011-05-21 21:07
NoLocalSettings.php
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OutputHandler.php
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OutputPage.php
113
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PHPVersionCheck.php
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PHPVersionError.php
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PageProps.php
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PageQueryPage.php
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Pager.php
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PathRouter.php
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PatrolLog.php
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Pingback.php
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PoolCounter.php
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Preferences.php
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PrefixSearch.php
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ProtectionForm.php
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ProxyLookup.php
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ProxyTools.php
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QueryPage.php
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RawPage.php
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RecentChange.php
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RequestContext.php
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Revision.php
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RevisionList.php
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Sanitizer.php
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SeleniumWebSettings.php
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ServiceWiring.php
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Setup.php
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SiteConfiguration.php
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SiteStats.php
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Skin.php
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SkinLegacy.php
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SkinTemplate.php
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SpecialPage.php
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SpecialPageFactory.php
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SquidPurgeClient.php
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Status.php
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StreamFile.php
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StringUtils.php
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StubObject.php
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TemplateParser.php
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TemplatesOnThisPageFormatter.php
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Title.php
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TitleArray.php
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TitleArrayFromResult.php
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User.php
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UserArray.php
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UserMailer.php
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UserRightsProxy.php
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ViewCountUpdate.php
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WatchedItem.php
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WatchedItemQueryService.php
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WatchedItemStore.php
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WebRequest.php
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WebRequestUpload.php
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WebResponse.php
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WebStart.php
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Wiki.php
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WikiCategoryPage.php
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WikiError.php
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WikiFilePage.php
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WikiMap.php
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WikiPage.php
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Xml.php
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XmlSelect.php
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XmlTypeCheck.php
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ZhClient.php
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ZhConversion.php
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ZipDirectoryReader.php
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2011-05-13 18:16
limit.sh
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mime.info
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mime.types
5.18
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tidy.conf
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wp-blog-header.php
2.74
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2026-08-22 08:29
wp-cron.php
2.74
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2026-08-22 08:29
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<?php define( 'MW_LC_VERSION', 1 ); /** * Class for caching the contents of localisation files, Messages*.php * and *.i18n.php. * * An instance of this class is available using Language::getLocalisationCache(). * * The values retrieved from here are merged, containing items from extension * files, core messages files and the language fallback sequence (e.g. zh-cn -> * zh-hans -> en ). Some common errors are corrected, for example namespace * names with spaces instead of underscores, but heavyweight processing, such * as grammatical transformation, is done by the caller. */ class LocalisationCache { /** Configuration associative array */ var $conf; /** * True if recaching should only be done on an explicit call to recache(). * Setting this reduces the overhead of cache freshness checking, which * requires doing a stat() for every extension i18n file. */ var $manualRecache = false; /** * True to treat all files as expired until they are regenerated by this object. */ var $forceRecache = false; /** * The cache data. 3-d array, where the first key is the language code, * the second key is the item key e.g. 'messages', and the third key is * an item specific subkey index. Some items are not arrays and so for those * items, there are no subkeys. */ var $data = array(); /** * The persistent store object. An instance of LCStore. */ var $store; /** * A 2-d associative array, code/key, where presence indicates that the item * is loaded. Value arbitrary. * * For split items, if set, this indicates that all of the subitems have been * loaded. */ var $loadedItems = array(); /** * A 3-d associative array, code/key/subkey, where presence indicates that * the subitem is loaded. Only used for the split items, i.e. messages. */ var $loadedSubitems = array(); /** * An array where presence of a key indicates that that language has been * initialised. Initialisation includes checking for cache expiry and doing * any necessary updates. */ var $initialisedLangs = array(); /** * An array mapping non-existent pseudo-languages to fallback languages. This * is filled by initShallowFallback() when data is requested from a language * that lacks a Messages*.php file. */ var $shallowFallbacks = array(); /** * An array where the keys are codes that have been recached by this instance. */ var $recachedLangs = array(); /** * All item keys */ static public $allKeys = array( 'fallback', 'namespaceNames', 'bookstoreList', 'magicWords', 'messages', 'rtl', 'capitalizeAllNouns', 'digitTransformTable', 'separatorTransformTable', 'fallback8bitEncoding', 'linkPrefixExtension', 'linkTrail', 'namespaceAliases', 'dateFormats', 'datePreferences', 'datePreferenceMigrationMap', 'defaultDateFormat', 'extraUserToggles', 'specialPageAliases', 'imageFiles', 'preloadedMessages', 'namespaceGenderAliases', ); /** * Keys for items which consist of associative arrays, which may be merged * by a fallback sequence. */ static public $mergeableMapKeys = array( 'messages', 'namespaceNames', 'dateFormats', 'imageFiles', 'preloadedMessages', ); /** * Keys for items which are a numbered array. */ static public $mergeableListKeys = array( 'extraUserToggles' ); /** * Keys for items which contain an array of arrays of equivalent aliases * for each subitem. The aliases may be merged by a fallback sequence. */ static public $mergeableAliasListKeys = array( 'specialPageAliases' ); /** * Keys for items which contain an associative array, and may be merged if * the primary value contains the special array key "inherit". That array * key is removed after the first merge. */ static public $optionalMergeKeys = array( 'bookstoreList' ); /** * Keys for items that are formatted like $magicWords */ static public $magicWordKeys = array( 'magicWords' ); /** * Keys for items where the subitems are stored in the backend separately. */ static public $splitKeys = array( 'messages' ); /** * Keys which are loaded automatically by initLanguage() */ static public $preloadedKeys = array( 'dateFormats', 'namespaceNames' ); /** * Constructor. * For constructor parameters, see the documentation in DefaultSettings.php * for $wgLocalisationCacheConf. * * @param $conf Array */ function __construct( $conf ) { global $wgCacheDirectory; $this->conf = $conf; $storeConf = array(); if ( !empty( $conf['storeClass'] ) ) { $storeClass = $conf['storeClass']; } else { switch ( $conf['store'] ) { case 'files': case 'file': $storeClass = 'LCStore_CDB'; break; case 'db': $storeClass = 'LCStore_DB'; break; case 'detect': $storeClass = $wgCacheDirectory ? 'LCStore_CDB' : 'LCStore_DB'; break; default: throw new MWException( 'Please set $wgLocalisationCacheConf[\'store\'] to something sensible.' ); } } wfDebug( get_class( $this ) . ": using store $storeClass\n" ); if ( !empty( $conf['storeDirectory'] ) ) { $storeConf['directory'] = $conf['storeDirectory']; } $this->store = new $storeClass( $storeConf ); foreach ( array( 'manualRecache', 'forceRecache' ) as $var ) { if ( isset( $conf[$var] ) ) { $this->$var = $conf[$var]; } } } /** * Returns true if the given key is mergeable, that is, if it is an associative * array which can be merged through a fallback sequence. */ public function isMergeableKey( $key ) { if ( !isset( $this->mergeableKeys ) ) { $this->mergeableKeys = array_flip( array_merge( self::$mergeableMapKeys, self::$mergeableListKeys, self::$mergeableAliasListKeys, self::$optionalMergeKeys, self::$magicWordKeys ) ); } return isset( $this->mergeableKeys[$key] ); } /** * Get a cache item. * * Warning: this may be slow for split items (messages), since it will * need to fetch all of the subitems from the cache individually. */ public function getItem( $code, $key ) { if ( !isset( $this->loadedItems[$code][$key] ) ) { wfProfileIn( __METHOD__.'-load' ); $this->loadItem( $code, $key ); wfProfileOut( __METHOD__.'-load' ); } if ( $key === 'fallback' && isset( $this->shallowFallbacks[$code] ) ) { return $this->shallowFallbacks[$code]; } return $this->data[$code][$key]; } /** * Get a subitem, for instance a single message for a given language. */ public function getSubitem( $code, $key, $subkey ) { if ( !isset( $this->loadedSubitems[$code][$key][$subkey] ) && !isset( $this->loadedItems[$code][$key] ) ) { wfProfileIn( __METHOD__.'-load' ); $this->loadSubitem( $code, $key, $subkey ); wfProfileOut( __METHOD__.'-load' ); } if ( isset( $this->data[$code][$key][$subkey] ) ) { return $this->data[$code][$key][$subkey]; } else { return null; } } /** * Get the list of subitem keys for a given item. * * This is faster than array_keys($lc->getItem(...)) for the items listed in * self::$splitKeys. * * Will return null if the item is not found, or false if the item is not an * array. */ public function getSubitemList( $code, $key ) { if ( in_array( $key, self::$splitKeys ) ) { return $this->getSubitem( $code, 'list', $key ); } else { $item = $this->getItem( $code, $key ); if ( is_array( $item ) ) { return array_keys( $item ); } else { return false; } } } /** * Load an item into the cache. */ protected function loadItem( $code, $key ) { if ( !isset( $this->initialisedLangs[$code] ) ) { $this->initLanguage( $code ); } // Check to see if initLanguage() loaded it for us if ( isset( $this->loadedItems[$code][$key] ) ) { return; } if ( isset( $this->shallowFallbacks[$code] ) ) { $this->loadItem( $this->shallowFallbacks[$code], $key ); return; } if ( in_array( $key, self::$splitKeys ) ) { $subkeyList = $this->getSubitem( $code, 'list', $key ); foreach ( $subkeyList as $subkey ) { if ( isset( $this->data[$code][$key][$subkey] ) ) { continue; } $this->data[$code][$key][$subkey] = $this->getSubitem( $code, $key, $subkey ); } } else { $this->data[$code][$key] = $this->store->get( $code, $key ); } $this->loadedItems[$code][$key] = true; } /** * Load a subitem into the cache */ protected function loadSubitem( $code, $key, $subkey ) { if ( !in_array( $key, self::$splitKeys ) ) { $this->loadItem( $code, $key ); return; } if ( !isset( $this->initialisedLangs[$code] ) ) { $this->initLanguage( $code ); } // Check to see if initLanguage() loaded it for us if ( isset( $this->loadedItems[$code][$key] ) || isset( $this->loadedSubitems[$code][$key][$subkey] ) ) { return; } if ( isset( $this->shallowFallbacks[$code] ) ) { $this->loadSubitem( $this->shallowFallbacks[$code], $key, $subkey ); return; } $value = $this->store->get( $code, "$key:$subkey" ); $this->data[$code][$key][$subkey] = $value; $this->loadedSubitems[$code][$key][$subkey] = true; } /** * Returns true if the cache identified by $code is missing or expired. */ public function isExpired( $code ) { if ( $this->forceRecache && !isset( $this->recachedLangs[$code] ) ) { wfDebug( __METHOD__."($code): forced reload\n" ); return true; } $deps = $this->store->get( $code, 'deps' ); if ( $deps === null ) { wfDebug( __METHOD__."($code): cache missing, need to make one\n" ); return true; } foreach ( $deps as $dep ) { // Because we're unserializing stuff from cache, we // could receive objects of classes that don't exist // anymore (e.g. uninstalled extensions) // When this happens, always expire the cache if ( !$dep instanceof CacheDependency || $dep->isExpired() ) { wfDebug( __METHOD__."($code): cache for $code expired due to " . get_class( $dep ) . "\n" ); return true; } } return false; } /** * Initialise a language in this object. Rebuild the cache if necessary. */ protected function initLanguage( $code ) { if ( isset( $this->initialisedLangs[$code] ) ) { return; } $this->initialisedLangs[$code] = true; # If the code is of the wrong form for a Messages*.php file, do a shallow fallback if ( !Language::isValidBuiltInCode( $code ) ) { $this->initShallowFallback( $code, 'en' ); return; } # Recache the data if necessary if ( !$this->manualRecache && $this->isExpired( $code ) ) { if ( file_exists( Language::getMessagesFileName( $code ) ) ) { $this->recache( $code ); } elseif ( $code === 'en' ) { throw new MWException( 'MessagesEn.php is missing.' ); } else { $this->initShallowFallback( $code, 'en' ); } return; } # Preload some stuff $preload = $this->getItem( $code, 'preload' ); if ( $preload === null ) { if ( $this->manualRecache ) { // No Messages*.php file. Do shallow fallback to en. if ( $code === 'en' ) { throw new MWException( 'No localisation cache found for English. ' . 'Please run maintenance/rebuildLocalisationCache.php.' ); } $this->initShallowFallback( $code, 'en' ); return; } else { throw new MWException( 'Invalid or missing localisation cache.' ); } } $this->data[$code] = $preload; foreach ( $preload as $key => $item ) { if ( in_array( $key, self::$splitKeys ) ) { foreach ( $item as $subkey => $subitem ) { $this->loadedSubitems[$code][$key][$subkey] = true; } } else { $this->loadedItems[$code][$key] = true; } } } /** * Create a fallback from one language to another, without creating a * complete persistent cache. */ public function initShallowFallback( $primaryCode, $fallbackCode ) { $this->data[$primaryCode] =& $this->data[$fallbackCode]; $this->loadedItems[$primaryCode] =& $this->loadedItems[$fallbackCode]; $this->loadedSubitems[$primaryCode] =& $this->loadedSubitems[$fallbackCode]; $this->shallowFallbacks[$primaryCode] = $fallbackCode; } /** * Read a PHP file containing localisation data. */ protected function readPHPFile( $_fileName, $_fileType ) { // Disable APC caching $_apcEnabled = ini_set( 'apc.cache_by_default', '0' ); include( $_fileName ); ini_set( 'apc.cache_by_default', $_apcEnabled ); if ( $_fileType == 'core' || $_fileType == 'extension' ) { $data = compact( self::$allKeys ); } elseif ( $_fileType == 'aliases' ) { $data = compact( 'aliases' ); } else { throw new MWException( __METHOD__.": Invalid file type: $_fileType" ); } return $data; } /** * Merge two localisation values, a primary and a fallback, overwriting the * primary value in place. */ protected function mergeItem( $key, &$value, $fallbackValue ) { if ( !is_null( $value ) ) { if ( !is_null( $fallbackValue ) ) { if ( in_array( $key, self::$mergeableMapKeys ) ) { $value = $value + $fallbackValue; } elseif ( in_array( $key, self::$mergeableListKeys ) ) { $value = array_unique( array_merge( $fallbackValue, $value ) ); } elseif ( in_array( $key, self::$mergeableAliasListKeys ) ) { $value = array_merge_recursive( $value, $fallbackValue ); } elseif ( in_array( $key, self::$optionalMergeKeys ) ) { if ( !empty( $value['inherit'] ) ) { $value = array_merge( $fallbackValue, $value ); } if ( isset( $value['inherit'] ) ) { unset( $value['inherit'] ); } } elseif ( in_array( $key, self::$magicWordKeys ) ) { $this->mergeMagicWords( $value, $fallbackValue ); } } } else { $value = $fallbackValue; } } protected function mergeMagicWords( &$value, $fallbackValue ) { foreach ( $fallbackValue as $magicName => $fallbackInfo ) { if ( !isset( $value[$magicName] ) ) { $value[$magicName] = $fallbackInfo; } else { $oldSynonyms = array_slice( $fallbackInfo, 1 ); $newSynonyms = array_slice( $value[$magicName], 1 ); $synonyms = array_values( array_unique( array_merge( $newSynonyms, $oldSynonyms ) ) ); $value[$magicName] = array_merge( array( $fallbackInfo[0] ), $synonyms ); } } } /** * Given an array mapping language code to localisation value, such as is * found in extension *.i18n.php files, iterate through a fallback sequence * to merge the given data with an existing primary value. * * Returns true if any data from the extension array was used, false * otherwise. */ protected function mergeExtensionItem( $codeSequence, $key, &$value, $fallbackValue ) { $used = false; foreach ( $codeSequence as $code ) { if ( isset( $fallbackValue[$code] ) ) { $this->mergeItem( $key, $value, $fallbackValue[$code] ); $used = true; } } return $used; } /** * Load localisation data for a given language for both core and extensions * and save it to the persistent cache store and the process cache */ public function recache( $code ) { static $recursionGuard = array(); global $wgExtensionMessagesFiles, $wgExtensionAliasesFiles; wfProfileIn( __METHOD__ ); if ( !$code ) { throw new MWException( "Invalid language code requested" ); } $this->recachedLangs[$code] = true; # Initial values $initialData = array_combine( self::$allKeys, array_fill( 0, count( self::$allKeys ), null ) ); $coreData = $initialData; $deps = array(); # Load the primary localisation from the source file $fileName = Language::getMessagesFileName( $code ); if ( !file_exists( $fileName ) ) { wfDebug( __METHOD__.": no localisation file for $code, using fallback to en\n" ); $coreData['fallback'] = 'en'; } else { $deps[] = new FileDependency( $fileName ); $data = $this->readPHPFile( $fileName, 'core' ); wfDebug( __METHOD__.": got localisation for $code from source\n" ); # Merge primary localisation foreach ( $data as $key => $value ) { $this->mergeItem( $key, $coreData[$key], $value ); } } # Fill in the fallback if it's not there already if ( is_null( $coreData['fallback'] ) ) { $coreData['fallback'] = $code === 'en' ? false : 'en'; } if ( $coreData['fallback'] !== false ) { # Guard against circular references if ( isset( $recursionGuard[$code] ) ) { throw new MWException( "Error: Circular fallback reference in language code $code" ); } $recursionGuard[$code] = true; # Load the fallback localisation item by item and merge it $deps = array_merge( $deps, $this->getItem( $coreData['fallback'], 'deps' ) ); foreach ( self::$allKeys as $key ) { if ( is_null( $coreData[$key] ) || $this->isMergeableKey( $key ) ) { $fallbackValue = $this->getItem( $coreData['fallback'], $key ); $this->mergeItem( $key, $coreData[$key], $fallbackValue ); } } $fallbackSequence = $this->getItem( $coreData['fallback'], 'fallbackSequence' ); array_unshift( $fallbackSequence, $coreData['fallback'] ); $coreData['fallbackSequence'] = $fallbackSequence; unset( $recursionGuard[$code] ); } else { $coreData['fallbackSequence'] = array(); } $codeSequence = array_merge( array( $code ), $coreData['fallbackSequence'] ); # Load the extension localisations # This is done after the core because we know the fallback sequence now. # But it has a higher precedence for merging so that we can support things # like site-specific message overrides. $allData = $initialData; foreach ( $wgExtensionMessagesFiles as $fileName ) { $data = $this->readPHPFile( $fileName, 'extension' ); $used = false; foreach ( $data as $key => $item ) { if( $this->mergeExtensionItem( $codeSequence, $key, $allData[$key], $item ) ) { $used = true; } } if ( $used ) { $deps[] = new FileDependency( $fileName ); } } # Load deprecated $wgExtensionAliasesFiles foreach ( $wgExtensionAliasesFiles as $fileName ) { $data = $this->readPHPFile( $fileName, 'aliases' ); if ( !isset( $data['aliases'] ) ) { continue; } $used = $this->mergeExtensionItem( $codeSequence, 'specialPageAliases', $allData['specialPageAliases'], $data['aliases'] ); if ( $used ) { $deps[] = new FileDependency( $fileName ); } } # Merge core data into extension data foreach ( $coreData as $key => $item ) { $this->mergeItem( $key, $allData[$key], $item ); } # Add cache dependencies for any referenced globals $deps['wgExtensionMessagesFiles'] = new GlobalDependency( 'wgExtensionMessagesFiles' ); $deps['wgExtensionAliasesFiles'] = new GlobalDependency( 'wgExtensionAliasesFiles' ); $deps['version'] = new ConstantDependency( 'MW_LC_VERSION' ); # Add dependencies to the cache entry $allData['deps'] = $deps; # Replace spaces with underscores in namespace names $allData['namespaceNames'] = str_replace( ' ', '_', $allData['namespaceNames'] ); # And do the same for special page aliases. $page is an array. foreach ( $allData['specialPageAliases'] as &$page ) { $page = str_replace( ' ', '_', $page ); } # Decouple the reference to prevent accidental damage unset($page); # Set the list keys $allData['list'] = array(); foreach ( self::$splitKeys as $key ) { $allData['list'][$key] = array_keys( $allData[$key] ); } # Run hooks wfRunHooks( 'LocalisationCacheRecache', array( $this, $code, &$allData ) ); if ( is_null( $allData['namespaceNames'] ) ) { throw new MWException( __METHOD__.': Localisation data failed sanity check! ' . 'Check that your languages/messages/MessagesEn.php file is intact.' ); } # Set the preload key $allData['preload'] = $this->buildPreload( $allData ); # Save to the process cache and register the items loaded $this->data[$code] = $allData; foreach ( $allData as $key => $item ) { $this->loadedItems[$code][$key] = true; } # Save to the persistent cache $this->store->startWrite( $code ); foreach ( $allData as $key => $value ) { if ( in_array( $key, self::$splitKeys ) ) { foreach ( $value as $subkey => $subvalue ) { $this->store->set( "$key:$subkey", $subvalue ); } } else { $this->store->set( $key, $value ); } } $this->store->finishWrite(); # Clear out the MessageBlobStore # HACK: If using a null (i.e. disabled) storage backend, we # can't write to the MessageBlobStore either if ( !$this->store instanceof LCStore_Null ) { MessageBlobStore::clear(); } wfProfileOut( __METHOD__ ); } /** * Build the preload item from the given pre-cache data. * * The preload item will be loaded automatically, improving performance * for the commonly-requested items it contains. */ protected function buildPreload( $data ) { $preload = array( 'messages' => array() ); foreach ( self::$preloadedKeys as $key ) { $preload[$key] = $data[$key]; } foreach ( $data['preloadedMessages'] as $subkey ) { if ( isset( $data['messages'][$subkey] ) ) { $subitem = $data['messages'][$subkey]; } else { $subitem = null; } $preload['messages'][$subkey] = $subitem; } return $preload; } /** * Unload the data for a given language from the object cache. * Reduces memory usage. */ public function unload( $code ) { unset( $this->data[$code] ); unset( $this->loadedItems[$code] ); unset( $this->loadedSubitems[$code] ); unset( $this->initialisedLangs[$code] ); foreach ( $this->shallowFallbacks as $shallowCode => $fbCode ) { if ( $fbCode === $code ) { $this->unload( $shallowCode ); } } } /** * Unload all data */ public function unloadAll() { foreach ( $this->initialisedLangs as $lang => $unused ) { $this->unload( $lang ); } } /** * Disable the storage backend */ public function disableBackend() { $this->store = new LCStore_Null; $this->manualRecache = false; } } /** * Interface for the persistence layer of LocalisationCache. * * The persistence layer is two-level hierarchical cache. The first level * is the language, the second level is the item or subitem. * * Since the data for a whole language is rebuilt in one operation, it needs * to have a fast and atomic method for deleting or replacing all of the * current data for a given language. The interface reflects this bulk update * operation. Callers writing to the cache must first call startWrite(), then * will call set() a couple of thousand times, then will call finishWrite() * to commit the operation. When finishWrite() is called, the cache is * expected to delete all data previously stored for that language. * * The values stored are PHP variables suitable for serialize(). Implementations * of LCStore are responsible for serializing and unserializing. */ interface LCStore { /** * Get a value. * @param $code Language code * @param $key Cache key */ function get( $code, $key ); /** * Start a write transaction. * @param $code Language code */ function startWrite( $code ); /** * Finish a write transaction. */ function finishWrite(); /** * Set a key to a given value. startWrite() must be called before this * is called, and finishWrite() must be called afterwards. */ function set( $key, $value ); } /** * LCStore implementation which uses the standard DB functions to store data. * This will work on any MediaWiki installation. */ class LCStore_DB implements LCStore { var $currentLang; var $writesDone = false; var $dbw, $batch; var $readOnly = false; public function get( $code, $key ) { if ( $this->writesDone ) { $db = wfGetDB( DB_MASTER ); } else { $db = wfGetDB( DB_SLAVE ); } $row = $db->selectRow( 'l10n_cache', array( 'lc_value' ), array( 'lc_lang' => $code, 'lc_key' => $key ), __METHOD__ ); if ( $row ) { return unserialize( $row->lc_value ); } else { return null; } } public function startWrite( $code ) { if ( $this->readOnly ) { return; } if ( !$code ) { throw new MWException( __METHOD__.": Invalid language \"$code\"" ); } $this->dbw = wfGetDB( DB_MASTER ); try { $this->dbw->begin(); $this->dbw->delete( 'l10n_cache', array( 'lc_lang' => $code ), __METHOD__ ); } catch ( DBQueryError $e ) { if ( $this->dbw->wasReadOnlyError() ) { $this->readOnly = true; $this->dbw->rollback(); $this->dbw->ignoreErrors( false ); return; } else { throw $e; } } $this->currentLang = $code; $this->batch = array(); } public function finishWrite() { if ( $this->readOnly ) { return; } if ( $this->batch ) { $this->dbw->insert( 'l10n_cache', $this->batch, __METHOD__ ); } $this->dbw->commit(); $this->currentLang = null; $this->dbw = null; $this->batch = array(); $this->writesDone = true; } public function set( $key, $value ) { if ( $this->readOnly ) { return; } if ( is_null( $this->currentLang ) ) { throw new MWException( __CLASS__.': must call startWrite() before calling set()' ); } $this->batch[] = array( 'lc_lang' => $this->currentLang, 'lc_key' => $key, 'lc_value' => serialize( $value ) ); if ( count( $this->batch ) >= 100 ) { $this->dbw->insert( 'l10n_cache', $this->batch, __METHOD__ ); $this->batch = array(); } } } /** * LCStore implementation which stores data as a collection of CDB files in the * directory given by $wgCacheDirectory. If $wgCacheDirectory is not set, this * will throw an exception. * * Profiling indicates that on Linux, this implementation outperforms MySQL if * the directory is on a local filesystem and there is ample kernel cache * space. The performance advantage is greater when the DBA extension is * available than it is with the PHP port. * * See Cdb.php and http://cr.yp.to/cdb.html */ class LCStore_CDB implements LCStore { var $readers, $writer, $currentLang, $directory; function __construct( $conf = array() ) { global $wgCacheDirectory; if ( isset( $conf['directory'] ) ) { $this->directory = $conf['directory']; } else { $this->directory = $wgCacheDirectory; } } public function get( $code, $key ) { if ( !isset( $this->readers[$code] ) ) { $fileName = $this->getFileName( $code ); if ( !file_exists( $fileName ) ) { $this->readers[$code] = false; } else { $this->readers[$code] = CdbReader::open( $fileName ); } } if ( !$this->readers[$code] ) { return null; } else { $value = $this->readers[$code]->get( $key ); if ( $value === false ) { return null; } return unserialize( $value ); } } public function startWrite( $code ) { if ( !file_exists( $this->directory ) ) { if ( !wfMkdirParents( $this->directory ) ) { throw new MWException( "Unable to create the localisation store " . "directory \"{$this->directory}\"" ); } } // Close reader to stop permission errors on write if( !empty($this->readers[$code]) ) { $this->readers[$code]->close(); } $this->writer = CdbWriter::open( $this->getFileName( $code ) ); $this->currentLang = $code; } public function finishWrite() { // Close the writer $this->writer->close(); $this->writer = null; unset( $this->readers[$this->currentLang] ); $this->currentLang = null; } public function set( $key, $value ) { if ( is_null( $this->writer ) ) { throw new MWException( __CLASS__.': must call startWrite() before calling set()' ); } $this->writer->set( $key, serialize( $value ) ); } protected function getFileName( $code ) { if ( !$code || strpos( $code, '/' ) !== false ) { throw new MWException( __METHOD__.": Invalid language \"$code\"" ); } return "{$this->directory}/l10n_cache-$code.cdb"; } } /** * Null store backend, used to avoid DB errors during install */ class LCStore_Null implements LCStore { public function get( $code, $key ) { return null; } public function startWrite( $code ) {} public function finishWrite() {} public function set( $key, $value ) {} } /** * A localisation cache optimised for loading large amounts of data for many * languages. Used by rebuildLocalisationCache.php. */ class LocalisationCache_BulkLoad extends LocalisationCache { /** * A cache of the contents of data files. * Core files are serialized to avoid using ~1GB of RAM during a recache. */ var $fileCache = array(); /** * Most recently used languages. Uses the linked-list aspect of PHP hashtables * to keep the most recently used language codes at the end of the array, and * the language codes that are ready to be deleted at the beginning. */ var $mruLangs = array(); /** * Maximum number of languages that may be loaded into $this->data */ var $maxLoadedLangs = 10; protected function readPHPFile( $fileName, $fileType ) { $serialize = $fileType === 'core'; if ( !isset( $this->fileCache[$fileName][$fileType] ) ) { $data = parent::readPHPFile( $fileName, $fileType ); if ( $serialize ) { $encData = serialize( $data ); } else { $encData = $data; } $this->fileCache[$fileName][$fileType] = $encData; return $data; } elseif ( $serialize ) { return unserialize( $this->fileCache[$fileName][$fileType] ); } else { return $this->fileCache[$fileName][$fileType]; } } public function getItem( $code, $key ) { unset( $this->mruLangs[$code] ); $this->mruLangs[$code] = true; return parent::getItem( $code, $key ); } public function getSubitem( $code, $key, $subkey ) { unset( $this->mruLangs[$code] ); $this->mruLangs[$code] = true; return parent::getSubitem( $code, $key, $subkey ); } public function recache( $code ) { parent::recache( $code ); unset( $this->mruLangs[$code] ); $this->mruLangs[$code] = true; $this->trimCache(); } public function unload( $code ) { unset( $this->mruLangs[$code] ); parent::unload( $code ); } /** * Unload cached languages until there are less than $this->maxLoadedLangs */ protected function trimCache() { while ( count( $this->data ) > $this->maxLoadedLangs && count( $this->mruLangs ) ) { reset( $this->mruLangs ); $code = key( $this->mruLangs ); wfDebug( __METHOD__.": unloading $code\n" ); $this->unload( $code ); } } }