PHPで開発したモール共同購入機能を詳しく紹介

CREATE TABLE goods (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(100) NOT NULL,
    price DECIMAL(10, 2) NOT NULL,
    stock INT NOT NULL,
    start_time TIMESTAMP NOT NULL,
    end_time TIMESTAMP NOT NULL,
    image VARCHAR(255) NOT NULL
);

CREATE TABLE orders (
    id INT PRIMARY KEY AUTO_INCREMENT,
    user_id INT NOT NULL,
    goods_id INT NOT NULL,
    price DECIMAL(10, 2) NOT NULL,
    quantity INT NOT NULL,
    total_price DECIMAL(10, 2) NOT NULL,
    payment_status INT NOT NULL,
    create_time TIMESTAMP NOT NULL,
    FOREIGN KEY (user_id) REFERENCES users(id),
    FOREIGN KEY (goods_id) REFERENCES goods(id)
);

<?php
// 获取团购商品信息
$sql = "SELECT * FROM goods WHERE end_time > NOW()";
$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        echo "商品名称：" . $row['name'] . "<br>";
        echo "团购价格：" . $row['price'] . "<br>";
        echo "原价：" . $row['original_price'] . "<br>";
        echo "剩余时间：" . $row['end_time'] - time() . "<br>";
        echo "<img src='" . $row['image'] . "'><br>";
        echo "<br>";
    }
} else {
    echo "当前没有团购商品";
}

mysqli_close($conn);
?>

<?php
// 用户参团
$goodsId = $_POST['goodsId'];
$userId = $_SESSION['userId'];

$sql = "SELECT stock FROM goods WHERE id = $goodsId";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$stock = $row['stock'];

if ($stock <= 0) {
    echo "库存不足，无法参团";
} else {
    // 生成团购订单
    $sql = "INSERT INTO orders (user_id, goods_id, price, quantity, total_price, payment_status, create_time) VALUES ($userId, $goodsId, $price, 1, $price, 0, NOW())";
    $result = mysqli_query($conn, $sql);

    echo "参团成功";
}

// 用户退团
$orderId = $_POST['orderId'];

$sql = "DELETE FROM orders WHERE id = $orderId";
$result = mysqli_query($conn, $sql);

echo "退团成功";

mysqli_close($conn);
?>

<?php
// 用户购买和支付
$orderId = $_POST['orderId'];
$paymentMethod = $_POST['paymentMethod'];

$sql = "SELECT * FROM orders WHERE id = $orderId";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$totalPrice = $row['total_price'];

// 根据支付方式处理支付逻辑
if ($paymentMethod == 'wechat') {
    // 微信支付
    // 调用微信支付接口
    echo "调用微信支付接口，支付金额为：" . $totalPrice;
} elseif ($paymentMethod == 'alipay') {
    // 支付宝支付
    // 调用支付宝支付接口
    echo "调用支付宝支付接口，支付金额为：" . $totalPrice;
} else {
    echo "无效的支付方式";
}

mysqli_close($conn);
?>

<script type="text/javascript">
    function updateCountdown() {
        // 更新剩余时间
        var endTime = "<?php echo $row['end_time']; ?>";
        var remainingTime = new Date(endTime) - new Date();
        document.getElementById("countdown").innerHTML = remainingTime;

        // 更新已参团人数
        var participants = "<?php echo $participants; ?>";
        document.getElementById("participants").innerHTML = participants;
    }
    setInterval(updateCountdown, 1000);
</script>