/**
* Gets the current instance of the class, there can only be one instance (this make the class a singleton class)
* note: this is needed as a work around for the inc.php file do not change
*
* @return object $instance - the current instance of the class
*/
public static function getInstance()
{
if (!self::$instance instanceof self) {
self::$instance = new self();
}
return self::$instance;
}
