php游戏网站注册代码

创建一个PHP游戏网站的用户注册功能涉及几个关键步骤，包括数据验证、表单处理和数据库操作。下面是一个简单的示例，展示了如何处理注册过程的基本结构：

<?php
// 连接数据库 (假设已配置好数据库连接)
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myGameDB";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// 用户注册表单处理
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = $_POST['username'];
    $email = $_POST['email'];
    $password = password_hash($_POST['password'], PASSWORD_DEFAULT);

    // 数据验证
    if (empty($username) || empty($email)) {
        echo "所有字段都是必需的!";
    } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        echo "无效的电子邮件地址!";
    } else {
        // 验证用户名是否唯一
        $sql = "SELECT * FROM users WHERE username='$username'";
        $result = $conn->query($sql);
        if ($result->num_rows > 0) {
            echo "用户名已经存在!";
        } else {
            // 将数据插入到数据库
            $sql = "INSERT INTO users (username, email, password) VALUES ('$username', '$email', '$password')";
            if ($conn->query($sql) === TRUE) {
                echo "新用户注册成功!";
            } else {
                echo "错误: " . $sql . "<br>" . $conn->error;
            }
        }
    }
}

// 注册表单 HTML
echo "
<form action='register.php' method='post'>
    <label for='username'>用户名:</label>
    <input type='text' id='username' name='username' required><br>

    <label for='email'>邮箱:</label>
    <input type='email' id='email' name='email' required><br>

    <label for='password'>密码:</label>
    <input type='password' id='password' name='password' required><br>

    <input type='submit' value='注册'>
</form>";
$conn->close();
?>