php 邮箱绑定

<?php
$to = "user@example.com";
$subject = "Test Email";
$message = "This is a test email.";
$headers = "From: sender@example.com";

if (mail($to, $subject, $message, $headers)) {
    echo "Email successfully sent.";
} else {
    echo "Email delivery failed.";
}
?>

<?php
// 生成验证链接
$token = bin2hex(random_bytes(16));
$verifyLink = "http://example.com/verify.php?token=" . $token;

// 发送验证邮件
$to = "user@example.com";
$subject = "Verify Your Email";
$message = "Please click the link to verify your email: " . $verifyLink;
$headers = "From: sender@example.com";

mail($to, $subject, $message, $headers);
?>

<?php
// 检查邮箱是否存在
$email = $_POST['email'];
$query = "SELECT * FROM users WHERE email = ?";
$stmt = $pdo->prepare($query);
$stmt->execute([$email]);
$user = $stmt->fetch();

if ($user) {
    echo "Email already exists.";
} else {
    // 继续注册流程
}
?>