$group = posix_getgrgid(1000); echo $group['name'];
$groups = posix_getgrall(); foreach ($groups as $group) { if ($group['gid'] == 1000) { echo $group['name']; break; } }This code retrieves information about all of the groups on the system and searches for the group with the GID 1000. Once it finds that group, it prints out the name of the group. These examples use the POSIX extension in PHP, so the package library that would be required to use them is likely the "posix" package.