PHPソーシャルメディアアプリケーションのポイントとレベルシステム機能の分析

CREATE TABLE users (
    user_id INT PRIMARY KEY AUTO_INCREMENT,
    username VARCHAR(50) NOT NULL,
    email VARCHAR(50) NOT NULL,
    password VARCHAR(255) NOT NULL,
    points INT DEFAULT 0,
    level INT DEFAULT 1
);

function registerUser($username, $email, $password) {
    // 对密码进行哈希加密
    $hashedPassword = password_hash($password, PASSWORD_DEFAULT);

    $conn = new mysqli('localhost', 'username', 'password', 'database');

    // 准备插入用户记录的SQL语句
    $sql = "INSERT INTO users (username, email, password) VALUES ('$username', '$email', '$hashedPassword')";

    if ($conn->query($sql) === TRUE) {
        echo "注册成功";
    } else {
        echo "注册失败: " . $conn->error;
    }

    $conn->close();
}

function updatePoints($user_id, $point_change) {
    $conn = new mysqli('localhost', 'username', 'password', 'database');

    // 更新用户积分
    $sql = "UPDATE users SET points = points + $point_change WHERE user_id = $user_id";

    if ($conn->query($sql) === TRUE) {
        echo "积分更新成功";
    } else {
        echo "积分更新失败: " . $conn->error;
    }

    $conn->close();
}

function calculateLevel($user_id) {
    $conn = new mysqli('localhost', 'username', 'password', 'database');

    // 查询用户当前等级
    $sql = "SELECT level FROM users WHERE user_id = $user_id";
    $result = $conn->query($sql);
    $row = $result->fetch_assoc();
    $currentLevel = $row['level'];

    // 根据不同等级的积分要求，计算用户新等级
    if ($points >= 100) {
        $newLevel = 2;
    } elseif ($points >= 500) {
        $newLevel = 3;
    } elseif ($points >= 1000) {
        $newLevel = 4;
    } else {
        $newLevel = $currentLevel;
    }

    // 更新用户等级
    $sql = "UPDATE users SET level = $newLevel WHERE user_id = $user_id";

    if ($conn->query($sql) === TRUE) {
        echo "等级更新成功";
    } else {
        echo "等级更新失败: " . $conn->error;
    }

    $conn->close();
}