more ftp functions

I apologize if I am posting this to the wrong list I am a newbie to the
lists.

I would like to add some functions to the ftp extention. Most notably at
this point I am interested in a ftp_get_resp() that returns ftp->inbuf
and perhaps the response code from the server. Or maybe it could return
the whole conversation. A (very) basic example of what I am aiming for
is below. How should I proceed?

Thanks,
Jess

<?php

$conn = ftp_connect('ftp.somewhere.com');
$ok = ftp_login($conn,'user','pass');
if(!$ok){ echo ftp_get_resp($conn); }
$ok = ftp_put();
if(!$ok){ echo ftp_get_resp($conn); }

?