从会话中的购物车中删除项目 |代码点火器

Question

我的购物车中有带有会话的商品，我想删除该商品，我的嵌套数组如下，

[cart_items] => Array
        (
            [0] => Array
                (
                    [item_id] => 1
                    [item_name] => Neapolitan Pizza
                    [price] => 750.00
                    [toppings] => Array
                        (
                            [0] => Array
                                (
                                    [id] => 3
                                    [name] => Chilli
                                    [price] => 100.00
                                )

                            [1] => Array
                                (
                                    [id] => 4
                                    [name] => Green chilli 
                                    [price] => 100.00
                                )

                        )

                    [quantity] => 1
                    [price_per_item] => 750
                )

            [1] => Array
                (
                    [item_id] => 16
                    [item_name] => Cheesy Garlic Bread
                    [price] => 420.00
                    [quantity] => 1
                    [price_per_item] => 420
                )

        )

控制器代码：-

在我的控制器中，我为 remove each item 创建了以下函数。我在这里错过了什么？

/Cart/remove

public function remove($id){
        $this->load->library('session');
        $list = $this->session->userdata('cart_items');
        if($list){
            foreach ($list as $item=>$value){
                if($id==$value['item_id']){
                    $this->session->unset_userdata($value);
                }
            }
        }
        redirect('Cart/index');

    }

在我看来，这就是我在锚标记中传递项目 ID 的方式。

查看：-

<?php $list = $this->session->userdata('cart_items');
        $grand_total=0;
        if($list==Null) {
            print_r("<div><li class='list-group-item d-flex justify-content-between lh-condensed'>There are no items in the your cart</li></div>");
            $sub_total=0;
        }else{
            $sub_total=0;
            foreach ($list as $item=>$value){
                echo "<li class='list-group-item d-flex justify-content-between lh-condensed'>";
                if($value['item_id']<16) {

                    print_r("<div>" . $value['item_id'] . "</div>");
                    print_r("<div>" . $value['item_name'] . "</div>");
                    print_r("<div>" . $value['price'] . "</div>");

                    // toppings array is empty 
                    $toppings_price = 0;
                    if ($value['toppings'] == null) {
                        print_r("<div>No toppings selected</div>");
                    } else {
                        foreach ($value['toppings'] as $val) {
                            // printing topping names
                            print_r("");
                            print_r($val['name']);
                            print_r(",");
                            $toppings_price = $toppings_price + $val['price'];
                        }
                    }

                }else{
                    print_r("<div>" . $value['item_id'] . "</div>");
                    print_r("<div>" . $value['item_name'] . "</div>");
                    print_r("<div>" . $value['price'] . "</div>");
                }

                print_r("<div>".$value['quantity']."</div>");
                print_r("<div><a href='".base_url()."index.php/Cart/remove/".$value['item_id']."' class='btn btn-danger'>Remove</a></div>");
                echo "</li>";

                //sub total
                if($value['item_id']<16){
                    $sub_total+=($value['price']*$value['quantity'])+$toppings_price;
                }else{
                    $sub_total+=($value['price']*$value['quantity']);
                }
            }
        }
        $grand_total = $sub_total;
        ?>

当我点击“删除”按钮时，它加载到同一页面，但项目行没有被删除。

Answer 1

public function remove($id){
        $this->load->library('session');
        $list = $this->session->userdata('cart_items');
        if($list){
            foreach ($list as $item=>$value){
                if($id==$value['item_id']){
                    $this->session->unset_userdata($value['item_id']);
                }
            }
        }
        redirect('Cart/index');

    }

查看代码：-

<td>
<a href="<?= base_url().'user/remove/'.$value['item_id']; ?>">
  <button>REMOVE</button>
</a>
</td>

销毁或取消设置会话的值？

 $this->session->unset_userdata('some_name');

对于多个数据，您可以：-

$array_items = array('username' => '', 'email' => '');

$this->session->unset_userdata($array_items);

并销毁会话：-

$this->session->sess_destroy();

注意：-有关 Codeigniter 中会话 Class 的更多信息，

https://codeigniter.com/userguide3/libraries/sessions.html

Answer 2

那是因为您的用户数据不是值本身，而是包含它们的数组。您需要从数组中删除该项目，然后将数组保存为新的用户数据。尝试这样的事情：

public function remove($id){
  $this->load->library('session');
  $list = $this->session->userdata('cart_items');

  if($list){
    foreach ($list as $item=>$value){
      if($id==$value['item_id']){
        unset($list[$item]);
        $list = array_values($list); // optional, reindex the array.
        break;
      }
    }

    $this->session->set_userdata('cart_items', $list);
  }

  redirect('Cart/index');

}

从会话中的购物车中删除项目 |代码点火器

Removing item from Cart in Session | Codeigniter

php

model-view-controller

session

codeigniter

multidimensional-array