Since php is free and Open Source, code written is php has to be the same...
I found a (partial) solution by keeping libraries on my server, and including them by http.
include "http://myserver.com/path/to/library/libname.inc";
In this way, libraries are kept secret (If U find a way to avoid direct http requests).
If U find some more, can U explain me how ?
Ope It Lps