Detailed steps to implement expired automatic settlement function in PHP

With the popularization of the Internet and the development of e-commerce, more and more companies have begun to shift their business online. In order to enable users to purchase and pay for goods smoothly, major websites have opened online payment functions. However, there is one issue that requires special attention when using the online payment function - payment expiration.

In extreme cases, the user does not choose the payment method or pay after confirming the payment. How should the seller deal with the transaction at this time? A common way is to set the order as "unpaid" and wait for the user to complete the payment within the validity period. But what if the user does not complete the payment within the validity period? Normally, the trading system will close orders that have not been paid successfully after the order validity period ends. However, since different payment methods have different payment processing times, setting the validity period is not easy to define.

In order to solve the problem of automatic settlement of expired orders, we thought of a solution, which is to use PHP to implement the automatic settlement function of orders to simplify the process. The following will introduce the detailed steps for implementing the expired automatic settlement function in PHP.

First, we need to create an order settlement script and schedule it in the server's scheduled task (usually a Cronjob). Scheduled tasks can ensure that the order list can be traversed regularly within any time period, and expired orders can be automatically settled.

The following is the main implementation code of PHP:

<?php /* 连接到数据库 */
$mysqli = new mysqli(&#39;localhost&#39;, &#39;username&#39;, &#39;password&#39;, &#39;database_name&#39;);
if ($mysqli->connect_errno) {
    echo "Failed to connect to MySQL: " . $mysqli->connect_error;
    exit();
}

/* 设置时区 */
date_default_timezone_set('Asia/Shanghai');

/* 订单有效期 */
$valid_period = 3600; /* 一小时 */

/* 遍历订单列表 */
$sql = "SELECT * FROM order_table WHERE status = 'pending'";
$order_result = $mysqli->query($sql);
while ($order_row = $order_result->fetch_assoc()) {
    /* 订单超时 */
    $order_time = strtotime($order_row['add_time']);
    if (time() - $order_time > $valid_period) {
        /* 取消订单 */
        $sql = "UPDATE order_table SET status = 'cancelled' WHERE order_id = ".$order_row['order_id'];
        if (!$mysqli->query($sql)) {
            echo "Error: " . $mysqli->error;
        }

        /* 结算金额 */
        $amount = $order_row['amount'];

        /* 更新卖家账户余额 */
        $sql = "UPDATE seller_table SET balance = balance + ".$amount." WHERE seller_id = ".$order_row['seller_id'];
        if (!$mysqli->query($sql)) {
            echo "Error: " . $mysqli->error;
        }

        /* 更新买家账户余额 */
        $sql = "UPDATE buyer_table SET balance = balance - ".$amount." WHERE buyer_id = ".$order_row['buyer_id'];
        if (!$mysqli->query($sql)) {
            echo "Error: " . $mysqli->error;
        }
    }
}

/* 关闭数据库连接 */
$mysqli->close();

?>

The main parts of the script include:

1. Establish a database connection
2. Set the script running time zone
3. Traverse the order list to determine whether the order validity period has expired
4. For orders that have exceeded the validity period, cancel the order and update the seller and buyer account balances

Finally, use this script Adding it to the server scheduled task can realize the automatic settlement function of order timeout.

In short, PHP's implementation of expired automatic settlement function can easily help sellers automatically deal with the trouble caused by users not paying and unable to settle. Moreover, this solution can benefit from the automatic execution of scheduled tasks, which not only saves programmers unnecessary energy, improves processing efficiency, but also brings a better shopping experience to users.

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