How to implement order timeout cancellation function in php

In the e-commerce platform, after the user places an order, if the payment is not made for a certain period of time, the order will become an invalid order. In order to avoid the negative impact of invalid orders on the platform, we need to cancel such orders. This article will introduce how to use PHP language to implement the order timeout cancellation function.

1. Overview

Order timeout cancellation means that after the user places an order, if the payment is not completed within a preset time (such as 30 minutes), the system will automatically cancel the order. This can avoid the backlog of unpaid orders, prevent order status confusion, and improve user experience.

2. Implementation ideas

1. Determine the order timeout

First, we need to determine the order timeout. This time can be set in the background, for example, set to 30 minutes. The timeout setting should take into account the user's payment habits to ensure that the user has sufficient time to operate. In addition, when setting the timeout, you also need to adjust it according to your own business conditions.

2. Scheduled tasks

An important step in realizing order timeout cancellation is to set up scheduled tasks. We need to create a scheduled task so that the system can execute the specified script regularly within a certain time interval.

In the Linux system, we can use crontab to manage scheduled tasks. The specific steps are as follows:

First open the terminal and enter the command:

crontab -e

Then open the Add a task to the file with the following format:

分 时 日 月 周 任务

Among them, minutes represent minutes, hours represent hours, days represent dates, months represent months, weeks represent days of the week, and tasks represent scripts or commands to be executed.

For example, if we want to execute a PHP script named cancel_order.php every 5 minutes, we can add a task:

*/5 * * * * php /path/to/cancel_order.php

3. Implementation script

Next, we need to implement a script for automatically canceling orders. The specific implementation steps are as follows:

(1) Get order information

We need to get all the status from the database that is "unpaid" (or other status corresponding to the unpaid status) and has timed out. order information.

(2) Cancel order

For a timed-out order, we need to change the order status to "Cancelled" and release the inventory resources occupied by the order.

(3) Send a notification

In order to let the user know that the order has been cancelled, we need to send a notification to the user. Users can be notified using email, SMS, APP push, etc.

3. Code Example

The following code is a simple example to demonstrate how to use PHP to implement the order timeout cancellation function.

<?php
// 获取数据库连接
$conn = mysqli_connect("localhost", "username", "password", "database");

// 设置订单超时时间
$timeout = 1800;

// 获取超时的订单
$sql = "SELECT * FROM orders WHERE status=&#39;unpaid&#39; AND UNIX_TIMESTAMP()-UNIX_TIMESTAMP(create_time)>$timeout";
$result = mysqli_query($conn, $sql);

while($row = mysqli_fetch_assoc($result)) {
    // 取消订单
    $sql = "UPDATE orders SET status='cancelled' WHERE id={$row['id']}";
    mysqli_query($conn, $sql);
    
    // 释放库存资源
    $sql = "UPDATE products SET stock=stock+{$row['count']} WHERE id={$row['product_id']}";
    mysqli_query($conn, $sql);
    
    // 发送通知
    $content = "您的订单#{$row['id']}已超时被取消。";
    send_notification($row['user_id'], $content);    
}

// 关闭数据库连接
mysqli_close($conn);

// 发送通知函数
function send_notification($user_id, $content) {
    // TODO: 发送通知
}
?>

In the above code, we use the mysqli extension to interact with the MySQL database. The specific steps are as follows:

(1) First obtain the database connection:

$conn = mysqli_connect("localhost", "username", "password", "database");

(2) Then set the order timeout:

$timeout = 1800;

(3) Then use the SQL statement to obtain Timed-out order information:

$sql = "SELECT * FROM orders WHERE status='unpaid' AND UNIX_TIMESTAMP()-UNIX_TIMESTAMP(create_time)>$timeout";
$result = mysqli_query($conn, $sql);

(4) For timed-out orders, we need to change the order status to "Cancelled" and release the inventory resources occupied by the order:

$sql = "UPDATE orders SET status='cancelled' WHERE id={$row['id']}";
mysqli_query($conn, $sql);

$sql = "UPDATE products SET stock=stock+{$row['count']} WHERE id={$row['product_id']}";
mysqli_query($conn, $sql);

(5 ) Finally, an order cancellation notification needs to be sent to the user:

$content = "您的订单#{$row['id']}已超时被取消。";
send_notification($row['user_id'], $content);

4. Summary

Through the above implementation, we can easily implement the PHP order timeout cancellation function. It should be noted that specific business conditions should be taken into consideration when setting the timeout period to avoid affecting the user experience. At the same time, the notification methods of different users should be taken into consideration when sending notifications in order to improve the coverage of notifications. Finally, we need to provide appropriate refund or return processing methods for orders canceled over time to avoid user complaints or compensation.

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