} $tree = $ns->siblings($input[1]); if (!$tree) { echo 'Error: ' . $ns->error . "\n"; break; } foreach ($tree as $row) { echo $row->id . "\n"; } break; case 'roots': if (!$collection) { echo "Error: no collection in use.\n"; break; } $tree = $ns->getRoots(); if (!$tree) { echo 'Error: ' . $ns->error . "\n"; break; } foreach ($tree as $row) { echo $row->id . "\n"; } break; case 'find': if (!$collection) { echo "Error: no collection in use.\n"; break; } array_shift($input); $query = array();