Set the correct GNUPG environment, before you call gnupg_init()!The current FPM/FastCGI/Module User must have read - if you import write - permissions on that directory. You won't get an error message, if something is not correct.Without a correct environment, all other gnupg functions will not work as you expected.<?php// Enter your .gnupg environmentputenv('GNUPGHOME=/var/www/vhosts/yourdomain/.gnupg');error_reporting(E_ALL);$res = gnupg_init();gnupg_seterrormode($res,GNUPG_ERROR_WARNING);$info = gnupg_keyinfo($res, 'your-key-id');echo "Key - Info<pre>";var_dump($info);echo "</pre>";?>