posix_getpgid

<?

$process_id = posix_getppid();

$return = posix_getpgid($process_id);

echo $return;

?>

35

<?

$process_id = posix_getppid();
$process_group_id = 40;

posix_setpgid($process_id, $process_group_id);

$return = posix_getpgid($process_id);

echo $return;

?>

40