Online PHP editor | refs for oH3SQ

<?php $array = [ [ 'GB' => 20827, 'US' => 73, 'ES' => 23, 'AU' => 15, 'DE' => 12, 'MY' => 4, 'QA' => 1, 'VN' => 1, 'SK' => 1, 'FJ' => 1, 'ME' => 1, 'TR' => 1, 'LV' => 1 ], [ 'GB' => 15070, 'US' => 3920, 'IE' => 1711, 'PH' => 1071, 'MT' => 578, 'AU' => 423, 'HR' => 241, 'ZA' => 210, 'FR' => 139 ] ]; $result = array_shift($array); var_export( array_reduce( $array, function($result, $row) { foreach ($row as $key => $value) { $result[$key] = ($result[$key] ?? 0) + $value; } return $result; }, $result ) );