gnuPG

Hey, I was just wondering if someone could help me with using gnuPG with PHP, I have generated the keys but can't seem to get any data back when trying to encrypt an variable. here is the command syntax im trying: $enCrypt = /usr/local/gnupg/bin/gpg --local-user UID --encrypt --recipient woo@foo.com.au $data; now this seems to do absoulutly nothing, I was wondering if the webserver can even use it as I made the keys as root, do I have to make a user for nobody, and generate the keys under this I sure hope not! I want to encrypt the contents of $data and insert it into a a mySQL text field, then provide the means to decrypt the data as well. If any one has used this before could they please help, I have been reading the gnuPG handbook and a mini howto, but can't seem to get this to work with PHP. Regards, Joseph