php - GPG Error Code 2

Question

GPG is always returning 2 at the result. My code is as follows

$cmd = "/usr/bin/gpg -a --recipient $to -e -o $outfile $infile";

Where outfile is the file where the encrypted data will be written and infile is the unencrypted data.

I don't know why this is happening. Can anyone please tell me what's wrong. Thanks.

Answer 1

GPG is asking whether you want to continue on with the encryption using an unsigned key. Since no user can input Y it produces an error.

To fix this put the following switches

--yes and --always-trust