如何在PHP中实现用户登录时发送手机验证码和邮件通知，并进行短信提醒

function sendEmail($to, $subject, $message) {
    $host = 'smtp.example.com'; // 例如：smtp.gmail.com
    $username = 'your-email@example.com'; // 您的邮箱地址
    $password = 'your-email-password'; // 您的邮箱密码
    $port = 587; // 邮箱服务器端口号，根据您的邮箱提供商设置

    $headers = array(
        'From' => $username,
        'To' => $to,
        'Subject' => $subject,
        'MIME-Version' => '1.0',
        'Content-type' => 'text/html; charset=utf-8'
    );

    $smtp = @fsockopen($host, $port);
    if (!$smtp) {
        return false;
    }

    fwrite($smtp, 'EHLO ' . $host . "
");
    fwrite($smtp, 'AUTH LOGIN' . "
");
    fwrite($smtp, base64_encode($username) . "
");
    fwrite($smtp, base64_encode($password) . "
");
    fwrite($smtp, 'MAIL FROM: <' . $username . '>' . "
");
    fwrite($smtp, 'RCPT TO: <' . $to . '>' . "
");
    fwrite($smtp, 'DATA' . "
");
    
    $message = implode("
", $headers) . "

" . $message . "
.";
    fwrite($smtp, $message . "
");
    fwrite($smtp, 'QUIT' . "
");

    fclose($smtp);

    return true;
}

function sendSMS($phoneNumber, $message) {
    $accessKeyId = 'your-acess-key-id'; // 您的短信服务提供商提供的AccessKeyId
    $accessKeySecret = 'your-access-key-secret'; // 您的短信服务提供商提供的AccessKeySecret
    $signName = "your-sign-name"; // 申请的短信签名
    $templateCode = "your-template-code"; // 申请的短信模板代码
    
    $params = array(
        'SignName' => $signName,
        'TemplateCode' => $templateCode,
        'PhoneNumbers' => $phoneNumber,
        'TemplateParam' => json_encode(array('code' => $message))
    );

    // 使用您选择的短信服务商的SDK发送短信
    $client = new DefaultAcsClient(new DefaultProfile('your-sdk-region', $accessKeyId, $accessKeySecret));
    $request = new AlibabaCloudSdklibClientRequestAlibabaCloudRpcRequest();
    $request->setProtocol("https");
    $request->setProduct("your-product-name");
    $request->setVersion("your-product-version");
    $request->setAction("your-product-action");
    $request->setMethod("POST");
    $request->setDomain("your-product-domain");
    $request->setRegion("your-sdk-region");
    $request->setEndpoint("your-product-endpoint");
    $request->setQueryParameters($params);
    $response = $client->getAcsResponse($request);

    // 处理短信发送结果并返回
    if($response->Code == "OK"){
        return true;
    } else {
        return false;
    }
}

session_start();

if(isset($_POST['submit'])){
    // 生成随机验证码
    $code = rand(100000, 999999);
    
    // 发送验证码到用户手机
    $phoneNumber = $_POST['phone'];
    sendSMS($phoneNumber, $code);
    
    // 发送验证码到用户邮箱
    $to = $_POST['email'];
    $subject = '登录验证码';
    $message = '您的登录验证码是：' . $code;
    sendEmail($to, $subject, $message);
    
    // 保存验证码到Session
    $_SESSION['code'] = $code;
    
    // 对用户进行短信提醒
    $message = '您的验证码已发送，请查收';
    sendSMS($phoneNumber, $message);
    
    // 对用户进行邮件提醒
    $subject = '验证码已发送';
    $message = '您的验证码已发送到您的邮箱，请查收';
    sendEmail($to, $subject, $message);
}