This is the only PHP in the entire message page:
<?php
$remove = array();
$remove[] = "";
$remove[] = "x";
$remove[] = "y";
$removeBegins = array();
$removeBegins[] = "Security";
$removeEnds = array();
$removeEnds[] = "_x";
$removeEnds[] = "_y";
$removeIncludes = array();
$removeIncludes[] = "Security";
?>
I'm using the default Block.php page, but also created a blank page that does the same thing.
I've seen this on the WA help pages, "The Create Email Message functionality in DataAssist...", but Data Assist does not show up in the WebAssist list in my Dreamweaver CC 2018 either,