I think the problem is that your web server (presumably apache) can
treat a program as a CGI script or a PHP script but not both.
However, you want to run the CGI script and then grab the output and
have it treated as PHP.

My knowledge on this topic is lmited, but I suspect that this is
possible but not easy to do. I'd search the web for someone who has
done if I were you. However, you might be reduced to writing scripts
that do it for you.

Gordon