(PECL gnupg >= 0.1)
gnupg_setsignmode — Sets the mode for signing
$identifier
   , int $signmode
   )Sets the mode for signing.
identifierThe gnupg identifier, from a call to gnupg_init() or gnupg.
sigmodeThe mode for signing.
       signmode takes a constant indicating what type of
       signature should be produced. The possible values are
       GNUPG_SIG_MODE_NORMAL,
       GNUPG_SIG_MODE_DETACH and
       GNUPG_SIG_MODE_CLEAR.
       By default GNUPG_SIG_MODE_CLEAR is used.
      
   Returns TRUE on success or FALSE on failure.
  
Example #1 Procedural gnupg_setsignmode() example
<?php
$res = gnupg_init();
gnupg_setsignmode($res,GNUPG_SIG_MODE_DETACH); // produce a detached signature
?>
Example #2 OO gnupg_setsignmode() example
<?php
$gpg = new gnupg();
$gpg -> setsignmode(gnupg::SIG_MODE_DETACH); // produce a detached signature
?>