/**
* Return an instance of Db Class
* If not connection to the database is made then firstly will try to connect to the database
* If connection to the database fails then `false` value will be returned
*
* @return Mixed;
*/
public function db()
{
if (!self::$db) {
self::$db = new Db($this->config('db'));
self::$db->connect();
}
return self::$db;
}
