(PECL gnupg >= 0.5)
gnupg_clearencryptkeys — Removes all keys which were set for encryption before
gnupg_clearencryptkeys(resource $identifier): bool
identifierThe gnupg identifier, from a call to gnupg_init() or gnupg.
Example #1 Procedural gnupg_clearencryptkeys() example
<?php $res = gnupg_init(); gnupg_clearencryptkeys($res); ?>
Example #2 OO gnupg_clearencryptkeys() example
<?php $gpg = new gnupg(); $gpg->clearencryptkeys(); ?>
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https://www.php.net/manual/en/function.gnupg-clearencryptkeys.php