PHP モールの構築: 会員レベルとポイント システムの作成

CREATE TABLE `member_level` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) NOT NULL,
  `discount` decimal(4,2) NOT NULL,
  `points` int(11) NOT NULL,
  PRIMARY KEY (`id`)
);

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

// 获取会员等级信息
$query = "SELECT * FROM member_level";
$result = mysqli_query($conn, $query);

// 展示会员等级信息
echo "<table>";
echo "<tr><th>ID</th><th>名称</th><th>折扣</th><th>积分</th></tr>";
while ($row = mysqli_fetch_assoc($result)) {
    echo "<tr>";
    echo "<td>".$row['id']."</td>";
    echo "<td>".$row['name']."</td>";
    echo "<td>".$row['discount']."</td>";
    echo "<td>".$row['points']."</td>";
    echo "</tr>";
}
echo "</table>";

// 关闭数据库连接
mysqli_close($conn);
?>

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) NOT NULL,
  `points` int(11) NOT NULL,
  PRIMARY KEY (`id`)
);

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

// 获取用户积分
$user_id = 1; // 假设当前用户的ID为1
$query = "SELECT points FROM user WHERE id = $user_id";
$result = mysqli_query($conn, $query);
$row = mysqli_fetch_assoc($result);
$points = $row['points'];

// 积分累积示例
$amount = 100; // 假设用户消费金额为100元
$earn_points = $amount * 0.1; // 每消费1元累积0.1积分
$new_points = $points + $earn_points;

// 积分使用示例
$use_points = 50; // 假设用户使用50积分抵扣部分金额
if ($use_points <= $points) {
    $new_points = $points - $use_points;
    // 其他处理，如更新订单金额
} else {
    // 积分不足，无法使用
}

// 更新用户积分
$query = "UPDATE user SET points = $new_points WHERE id = $user_id";
mysqli_query($conn, $query);

// 关闭数据库连接
mysqli_close($conn);
?>