在codeigniter中使用mailgun验证电子邮件

$config['protocol'] = 'smtp';
$config['smtp_host'] = 'smtp.mailgun.org';
$config['smtp_user'] = 'postmaster@your-domain.com'; // Mailgun提供的SMTP用户名
$config['smtp_pass'] = 'your-smtp-password'; // Mailgun提供的SMTP密码
$config['smtp_port'] = 587;
$config['mailtype'] = 'html';
$config['charset'] = 'utf-8';
$config['newline'] = "\r\n";

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

require APPPATH . 'third_party/PHPMailer/PHPMailerAutoload.php'; // 导入PHPMailer库

class Email {

    private $ci;

    public function __construct() {
        $this->ci =& get_instance();
        $this->ci->load->config('email'); // 加载邮件配置
    }

    public function send_verification_email($to_email, $verification_code) {
        $mail = new PHPMailer;
        $mail->isSMTP();
        $mail->Host = $this->ci->config->item('smtp_host');
        $mail->SMTPAuth = true;
        $mail->Username = $this->ci->config->item('smtp_user');
        $mail->Password = $this->ci->config->item('smtp_pass');
        $mail->SMTPSecure = 'tls';
        $mail->Port = $this->ci->config->item('smtp_port');
        $mail->setFrom($this->ci->config->item('smtp_user'), 'Your Name');
        $mail->addAddress($to_email);
        $mail->isHTML(true);
        $mail->Subject = 'Email Verification';
        $mail->Body = 'Please click the following link to verify your email: <a href="https://example.com/verify?code='.$verification_code.'">Verify Email</a>';
        if (!$mail->send()) {
            return false;
        } else {
            return true;
        }
    }
}

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class User extends CI_Controller {

    public function __construct() {
        parent::__construct();
        $this->load->library('email'); // 加载Email库
    }

    public function register() {
        // 注册逻辑
        // ...
        
        // 发送验证邮件
        $this->email->send_verification_email($email, $verification_code);
    }
}