Online PHP editor | output for tC8Xu

<?php $res1 = [ ['ID' => 60,'TOTAL' => 500], ['ID' => 61,'TOTAL' => 600], ['ID' => 63,'TOTAL' => 500] ]; $res2 = [ ['ID' => 60,'TOTAL' => 600], ['ID' => 61,'TOTAL' => 700], ['ID' => 64,'TOTAL' => 800] ]; function summTotal(&$result, $parts) { array_walk($parts, function($item) use (&$result){ if (isset($result[$item['ID']])) { $result[$item['ID']]['TOTAL'] += $item['TOTAL']; } else { $result[$item['ID']] = $item; } }); } $result = []; summTotal($result, $res1); summTotal($result, $res2); print_r($result);