GnuPG PHP website - credit card encryption

Hello

After moving servers I was having trouble with GnuPG so I generated a new set of keys in my own name. They work in the command line:

gpg --encrypt -ao encrypteddata -r rhiannon@viva.org.uk data

But not in my PHP code.

This is the bit that doesn’t work at all (errors listed below).

-----------------------------------------------------------------------------------------------------------------

//invoke PGP to encrypt file contents
system("/usr/bin/gpg --encrypt -ao $crypted -r 'Rhiannon <rhiannon@viva.org.uk>' $plainTxt");

//open file and read encrypted contents into var
$fd = fopen($crypted, "r");

$encrypted_stuff = fread($fd, filesize($crypted));

fclose($fd);

-----------------------------------------------------------------------------------------------------------------

If I make the fopen “w+” it does create the file, but it is empty at 0 bytes.

As I said, it works beautifully from the command line – my new user is able to encrypt and decrypt.