gnupg_cleardecryptkeys

(PECL gnupg >= 0.5)

Removes all keys which were set for decryption before

<?php
$res = gnupg_init();
gnupg_cleardecryptkeys($res);
?>

<?php
$gpg = new gnupg();
$gpg->cleardecryptkeys();
?>

Source: reference/gnupg/functions/gnupg-cleardecryptkeys.xml · from the official PHP manual (php/doc-en)