Online PHP editor | refs for kLPSO

<?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" ] ] ]; $all_numbers=array_keys($array[0]); foreach($all_numbers as $number){ $array[0][$number]['value']=array_sum(array_column(array_column($array,$number),'value')); } $array=[$array[0]]; /* foreach($array as &$group){ var_export(array_column($group,'121')); //foreach($group as $number=>$subarray){ // $group[$number]['value']=array_sum(array_column($group,$number)); //} break; } */ var_export($array);