php 邮件认证

<?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);
}

// 生成验证令牌
$token = bin2hex(random_bytes(32));

// 插入数据库
$email = $_POST['email'];
$sql = "INSERT INTO verification_tokens (email, token) VALUES ('$email', '$token')";
$conn->query($sql);

// 发送验证邮件
$to = $email;
$subject = "邮箱验证";
$message = "请点击以下链接验证您的邮箱: http://example.com/verify.php?token=$token";
$headers = "From: no-reply@example.com";
mail($to, $subject, $message, $headers);

echo "验证邮件已发送，请检查您的邮箱。";

$conn->close();
?>