/**
* Constructor.
*/
public static function get_instance()
{
// create an object
NULL === self::$instance and self::$instance = new self();
return self::$instance;
// return the object
}
/**
* Constructor.
*/
public static function get_instance()
{
// create an object
NULL === self::$instance and self::$instance = new self();
return self::$instance;
// return the object
}