SetValue Unity

[Serializable]
    public class Player
    {
        public string username;
        public string email;
        public string uid;

        public string game_data_json0;
        public string game_data_json1;
        public string game_data_json2;
        public string game_data_json3;
    }
// Get cookies using GetCookie Jslib
public string UID = "pirUJjkkId"; // Example
public Player player;


public IEnumerator SetScore()
    {
        WWWForm form = new WWWForm ();
        player.uid = UID;
        player.game_data_json0 = JsonUtility.ToJson (player, true); // Example
        Debug.Log ("I set: " + player.uid);
        string json = JsonUtility.ToJson (player, true);
        form.AddField ("arrayData", json);
//CHANGE
        WWW www = new WWW ("http://example-name.com/db-unity/SetValue.php", form);
        yield return www;
        if (www.error != null) {
            Debug.Log ("Error: " + www.error);
            yield break;
        } else {
            Debug.Log ("Response: " + www.text);
        }
    }