Just to ensure you, because it is not mentioned in the manual: of course, only the public key is exported, even if you have the private key in your keyring.
(PECL gnupg >= 0.1)
gnupg_export — キーをエクスポートする
キーの fingerprint をエクスポートします。
成功した場合、この関数はキーのデータを返します。
失敗した場合、この関数は false を返します。
例1 Procedural gnupg_export() example
<?php
$res = gnupg_init();
$export = gnupg_export($res,"8660281B6051D071D94B5B230549F9DC851566DC");
echo $export;
?>例2 OO gnupg_export() example
<?php
$gpg = new gnupg();
$export = $gpg->export("8660281B6051D071D94B5B230549F9DC851566DC");
?>Just to ensure you, because it is not mentioned in the manual: of course, only the public key is exported, even if you have the private key in your keyring.