(PECL gnupg >= 0.5)
gnupg_listsignatures — List key signatures
$identifier, string $keyid): array
identifierThe gnupg identifier, from a call to gnupg_init() or gnupg.
keyidThe key ID to list signatures for.
   On success, this function returns an array of key signatures.
   On failure, this function returns null.
  
Example #1 Procedural gnupg_listsignatures() example
<?php
$res = gnupg_init();
$signatures = gnupg_listsignatures($res, "8660281B6051D071D94B5B230549F9DC851566DC");
print_r($signatures);
?>
Example #2 OO gnupg_listsignatures() example
<?php
$gpg = new gnupg();
$signatures = $gpg->listsignatures("8660281B6051D071D94B5B230549F9DC851566DC");
print_r($signatures);
?>