Online PHP editor | refs for WofT5

<?php $array = [ [ 121 => [ "number" => 121, "name" => "Some Name 1", "value" => "2.222" ], 116 => [ "number" => 116, "name" => "Some Name 2", "value" => "1.111" ], 1 => [ "number" => 1, "name" => "Some Name 3", "value" => "1.232" ] ], [ 121 => [ "number" => 121, "name" => "Some Name 1", "value" => "1.111" ], 116 => [ "number" => 116, "name" => "Some Name 2", "value" => "2.222" ], 1 => [ "number" => 1, "name" => "Some Name 3", "value" => "3.111" ] ] ]; $result = []; foreach ($array as $group) { foreach ($group as $key => $row) { if (!isset($result[$key])) { $result[$key] = $row; } else { $result[$key]['value'] += $row['value']; } } } var_export($result);