1. Go to this page and download the library: Download globegroup/mailer-bundle library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
globegroup / mailer-bundle example snippets
namespace App\Mailer;
use GlobeGroup\MailerBundle\Mailer\Mailer;
class TestMailer extends Mailer
{
}