PHP: Give a name to an array of JSON objects?

Question

I have managed to get data from database in PHP file. From there(data.php),

$output = json_encode($result);

The result would be like this,<

Answer 1

 $result =array('kitten'=> $output);

output

{
"kitten":[
          {"kitty":"Whitely"},
          {"kitty":"Tabby"},
          {"kitty":"Ruby"},
          {"kitty":"Silver"}
        ]
}