Online PHP editor | output for neneO

<?php $array_a = [ 0 => ['DATE' => '2012-11-28', 'totalCount' => null], 1 => ['DATE' => '2012-11-29', 'totalCount' => null], 2 => ['DATE' => '2012-11-30', 'totalCount' => null], ]; $array_b = [ 0 => ['DATE' => '2012-11-28', 'totalCount' => 30], 2 => ['DATE' => '2012-11-30', 'totalCount' => 40], 12 => ['DATE' => '2012-12-05', 'totalCount' => 50], ]; $result = $array_a; foreach($array_a as $key => $value){ if (array_key_exists($key, $array_b)){ $result[$key] = $array_b[$key]; } else { $result[$key] = $value; } } var_export($result);