"Hello World" for email, using SendGrid with PHP.

hello-email.php

<?php
// using SendGrid's PHP Library
// https://github.com/sendgrid/sendgrid-php
 require 'vendor/autoload.php';
 $sendgrid = new SendGrid("SENDGRID_APIKEY");
 $email    = new SendGrid\Email();
  
 $email->addTo("test@sendgrid.com")
       ->setFrom("you@youremail.com")
       ->setSubject("Sending with SendGrid is Fun")
       ->setHtml("and easy to do anywhere, even with PHP");
  
 $sendgrid->send($email);
?>