How to allow Form Method POST to FREPBX?

Friends, will be designing my own form for Web Callback instead of that very simple “button” provided by the developers of Freepbx. The plan is to use form method POST to send form data to wcb.php on the server and my first attempt is appears to be “blocked” by FREEPBX. Is it possible to allow for POSTS get through to wcb.php script? How?

Can you please stop making different threads for the same thing? It is not helpful.