linux gpg命令→php gnupg库解释

Question

我有一个.sh代码，我在其中签名，并使用带有user_ID的gpg命令加密.gz文件。如何从php库gnupg中获得相同的输出文件？

.sh代码：

gpg -se -r ${GPG_USER} file.csv.gz

输出：

file.csv.gz.gpg

当前尝试代码PHP：

use gnupg;

$gpg = new gnupg();
$gpg->addencryptkey("FINGERPRINT"); //How to find FINGERPRINT?
$gpg->addsignkey("FINGERPRINT","USER_ID"); //How to find FINGERPRINT?
$enc = $gpg->encryptsign(file_get_contents("file.csv.gz"));
$file = fopen("file.csv.gz.gpg","w");
fputs($file, $enc); //is it correct way to export encrypted output file?