public static function getAllWikiInfos() {
		if ( !isset( self::$wikiInfos ) ) {
			$wikiInfos = self::getAllDbInfos();
			foreach ( $wikiInfos as $dbname => &$wikiInfo ) {
				if ( !$wikiInfo['url'] ) {
					unset( $wikiInfos[ $dbname ] );
				}
			}

			self::$wikiInfos = $wikiInfos;
		}

		return self::$wikiInfos;
	}