Online PHP editor | output for AntFS

<?php $array = [ ["division" => "division1"], ["division" => "division2"], ["division" => "division1", "department" => "department10"], ["division" => "division1", "department" => null, "team" => "team91"], ["division" => "division1", "department" => "department10", "team" => "team85"], ["division" => "division3", "department" => "department999"], ["division" => "division2", "department" => "department33"], ["division" => "division1", "department" => null, "team" => "team92"] ]; array_multisort(array_map('count', $array), SORT_DESC, $array); $result = []; foreach ($array as $row) { foreach ($result as $saved) { if (!array_diff_assoc($row, $saved)) { continue 2; } } $result[] = $row; } var_export($result);