php注册邮箱验证

<?php
// 数据库连接
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 用户注册信息
$email = $_POST['email'];
$token = bin2hex(random_bytes(16)); // 生成验证令牌

// 将用户信息和令牌存入数据库
$sql = "INSERT INTO users (email, token, verified) VALUES ('$email', '$token', 0)";
if ($conn->query($sql) === TRUE) {
    // 发送验证邮件
    $to = $email;
    $subject = "邮箱验证";
    $message = "请点击以下链接验证您的邮箱地址：\n\nhttp://example.com/verify.php?token=$token";
    $headers = "From: webmaster@example.com";

    mail($to, $subject, $message, $headers);
    echo "验证邮件已发送，请检查您的邮箱。";
} else {
    echo "错误: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>