ezp-legacy-extension eZ Publish legacy extension template links that might be useful: https://en.ezpedia.org/ez/template_operators https://www.netgenlabs.com/Blog/Confessions-of-an-apprentice-Setting-up-template-operators-in-eZ-Publish https://github.com/brookinsconsulting/wrapoperator/blob/master/autoloads/WrapOperator.php