如果数量小于0，如何从购物车中删除商品。 Laravel

Question

My problem is that the item is not removed from cart when quantity is less than 0 and also quantity is going -1,-2 etc. Can you help me?

This is my controller

 public function reducequantity(Request $request){
    $id = $_GET['id']; 
    $oldcart = Session::has('cart') ? Session::get('cart') : null;
    $cart = new Cart($oldcart);
    $cart->reducequantity($id);
    Session::put('cart',$cart);      
    echo json_encode("item reduced from cart");
    }

This is my model

    public function reducequantity($id){       
        $this->items[$id]['qty']--;
        $this->items[$id]['price'] -=  $this->items[$id]['item']['price'];
        $this->totalqty--;
        $this->total_price -=  $this->items[$id]['item']['price'];
        if($this->items[$id]['qty'] <= 0){ 
            unset($this->items[$id]);
        }       
   } 

Answer 1

    **Solved By making a little change in controller**
    public function removeitem(Request $request){
     $id = $_GET['id']; 
     $oldcart = Session::has('cart') ? Session::get('cart') : null;
     $cart = new Cart($oldcart);
      $cart->removeitem($id);
       if(count($cart->items) > 0){
         Session::put('cart',$cart);
     }else{
        Session::forget('cart');
     }

      echo json_encode("item removed");
}