如何取消设置会话项目计数

Question

请帮忙，我正在练习建立一个电子商务网站，我希望在他们成功订购产品后，购物车图标中的项目计数将恢复为 0 并停止所有会话。假设我订购了 3 件产品，那么购物车的商品标记为 3，完成后 returns 变为 0。它确实 return 到 0，但是当您单击加载到 load_cart.php 的购物车图标时，它仍会加载到我订购的上一个项目。

来自 checkout_action.php >>>>>going to header("location:order_confirmation.php?checkout=success");

<?php session_start();
  if ($_GET['checkout'] =='success'){
  unset($_SESSION['item_count']);
 }
?>

这是我存放购物车的地方[=14=]

<?php session_start();
  $id = $_POST['item_id'];
  $quantity = $_POST['item_quantity'];
  $_SESSION["cart"][$id] = $quantity;
  $_SESSION["item_count"] = array_sum($_SESSION["cart"]);
  echo "<span class='carttxt glyphicon glyphicon-shopping-cart'> SHOP </span> 
     <span class='badge'>" . $_SESSION["item_count"] . "</span>";

然后我使用这个 load_cart.php

加载购物车

 <?php
 session_start();
 include("includes/head.php");
 include("includes/db_config.php");
 include("includes/jsbottom.php");

 $data = "<table class='table table-striped table-responsive'>
   <thead>
     <tr>
       <th>Product</th>
       <th>Price</th>
       <th>Quantity</th>
       <th>Sub-Total</th>
       <th>Action</th>
       </tr>
     </thead>
   <tbody>";

$grand_total = 0;
foreach($_SESSION['cart'] as $product_id => $quantity) {
$sql = "SELECT * FROM items where id = '$product_id' ";
$result = mysqli_query($conn, $sql);
if(mysqli_num_rows($result) > 0) {
   while($row = mysqli_fetch_assoc($result)) {
     $product_name = $row["product_name"];
     $product_desc = $row["product_desc"];
     $price = $row["price"];
     $image = $row["image"];

     //For computing the sub total and grand total
     $subTotal = $quantity * $price;
     $grand_total += $subTotal;

     $data .="<tr>
             <td>$product_name . <div class='middle'> <img 
            src='$image' style='height:100px;width:100px;'/> </div> </td>
            <td id='price$product_id'> $price</td>
            <td><input type='number' class ='form-control' 
           value = '$quantity' id='quantity$product_id' 
           onchange='changeNoItems($product_id)' min='1' size='5'></td>
           <td id='subTotal$product_id'>$subTotal</td>
           <td><button class='btn btn-danger' 
           onclick='removeFromCart($product_id)'><span class='glyphicon 
           glyphicon-trash' aria-hidden='true'></span> Remove</button></td>
           </tr>";
         }
       }
     }

    $data .="</tbody></table>
      <hr>
      <a href='checkout.php'> <h3 align='right'>Total: &#x20B1; <span 
          id='grandTotal'>$grand_total </span><br><button class='btn btn- 
          success btn-lg'><span class='glyphicon glyphicon-ok-sign'></span> 
          Check Out</button></h3>  </a>
          <hr>";

   echo $data;
?>

Answer 1

好吧，您的代码没有检查 $_SESSION['item_count'] 是否为 0。它正在获取 $_SESSION['cart'] 的内容。您需要检查 $_SESSION['item_count'] 是否为 0 或销毁 $_SESSION['cart'] 例如：

<?php session_start();
  if ($_GET['checkout'] =='success') {
  session_destroy();
 }
?>

如何取消设置会话项目计数

How to Unset session item count number

php

e-commerce

session-variables