Append Subject in outgoing emails - eg date time stamp

ready.php

<?php
// /site/ready.php
// Email subjects - add a datestamp to email subjects
$forms->addHookBefore('FormBuilderProcessor::emailForm', function($event) {
  $processor = $event->object;
  $formData = $event->arguments(1); // associative array of form data, if needed
  $processor->emailSubject = $processor->emailSubject . " (" . date('Y/m/d H:i:s') . ")";
});