laravel response json encode code example

Example 1: how get value of json encode in laravel

$json = '{"countryId":"84","productId":"1","status":"0","opId":"134"}';
$json = json_decode($json, true);
echo $json['countryId'];
echo $json['productId'];
echo $json['status'];
echo $json['opId'];

Example 2: laravel json response with error code

return Response::json([
    'hello' => $value
], 201); // Status code here