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 — Exporta una llave
Exporta la llave fingerprint.
identifierEl identificador gnupg, desde una llamada a gnupg_init() o gnupg.
fingerprintLa clave fingerprint.
En caso de éxito, esta función retorna los datos de la llave.
En caso de error, retorna false.
Ejemplo #1 Ejemplo de gnupg_export() mediante funciones
<?php
$res = gnupg_init();
$export = gnupg_export($res,"8660281B6051D071D94B5B230549F9DC851566DC");
echo $export;
?>Ejemplo #2 Ejemplo de gnupg_export() mediante OO
<?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.