php实现过期自动结算功能的详细步骤

<?php

/* 连接到数据库 */
$mysqli = new mysqli('localhost', 'username', 'password', 'database_name');
if ($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();

?>