Render MJML markup in PHP.
require 'vendor/autoload.php';
$input = '<mjml>
<mj-body>
<mj-section>
<mj-column>
<mj-image width="100" src="/assets/img/logo-small.png"></mj-image>
<mj-divider border-color="#F45E43"></mj-divider>
<mj-text font-size="20px" color="#F45E43" font-family="helvetica">Hello World</mj-text>
</mj-column>
</mj-section>
</mj-body>
</mjml>';
$mjml = new \bkonetzny\MjmlRenderer\Renderer();
echo $mjml->render($input);