/**
* Figures out when next payment is due. Mostly for recurring cycles.
*
* @global type $wpi_settings
* @param type $args
* @return type
*/
function payment_due($args = '')
{
$defaults = array('invoice_id' => false);
extract(wp_parse_args($args, $defaults), EXTR_SKIP);
//** Figure out if this is a recurring bill */
return WPI_Functions::days_since($this->data['meta'][due_date]);
}
