如何在codeigniter中使用sendgrid api库作为第三方库

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

$config['sendgrid_api_key'] = 'YOUR_SENDGRID_API_KEY';
$config['sendgrid_default_from'] = 'your-email@example.com';
$config['sendgrid_default_name'] = 'Your Name';

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

require_once APPPATH . 'libraries/sendgrid-php/sendgrid-php.php';

class Sendgrid {

    private $ci;

    public function __construct() {
        $this->ci =& get_instance();
        $this->ci->config->load('sendgrid');
    }

    public function send_email($to, $subject, $message) {
        $sendgrid = new \SendGrid($this->ci->config->item('sendgrid_api_key'));
        $email = new \SendGrid\Mail\Mail();
        $email->setFrom($this->ci->config->item('sendgrid_default_from'), $this->ci->config->item('sendgrid_default_name'));
        $email->setSubject($subject);
        $email->addTo($to);
        $email->addContent("text/plain", $message);

        try {
            $response = $sendgrid->send($email);
            return true;
        } catch (Exception $e) {
            log_message('error', 'SendGrid: ' . $e->getMessage());
            return false;
        }
    }
}

public function send_email() {
    $this->load->library('sendgrid');

    $to = 'recipient@example.com';
    $subject = 'Test Email';
    $message = 'This is a test email sent using SendGrid API in CodeIgniter.';

    if ($this->sendgrid->send_email($to, $subject, $message)) {
        echo 'Email sent successfully.';
    } else {
        echo 'Failed to send email.';
    }
}