/**
* * returns interface to DBWrapper singleton
* @param $host - - server host name
* @param $dbname - - db name
* @param $user - - db user name
* @param $password - - db user password
* @return IDBWrapper cast of DBWrapper object
*/
public static function instance($host = NULL, $dbname = NULL, $user = NULL, $password = NULL)
{
DBG::log(__CLASS__, __FUNCTION__, 'before:', array($host, $dbname, $user));
if (!isset(self::$dbwrapper)) {
self::$dbwrapper = new DBWrapper($host, $dbname, $user, $password);
}
$cast = DBWrapper::castIDBWrapper(self::$dbwrapper);
DBG::log(__CLASS__, __FUNCTION__, 'after:', array(self::$dbwrapper, $cast));
return $cast;
}
