//²MªÅ«K·í³U


    include_once('Bag.inc');
    session_start();
    
    $_SESSION['bag']->delete_all();

//delete_all()

 function delete_all(){
        $this->lunchbox_number = array();
        $this->lunchbox_name = array();
        $this->single_cost = array();
        $this->quantity = array();
        $this->price = array();	
        $this->total_cost = 0;
    }