Vector3 screenPos = camera.WorldToScreenPoint(usefuls[i].transform.position);
CursorObject.transform.position = camera.ScreenToWorldPoint(new Vector3(screenPos.x, screenPos.y, 1));
if(isset($_POST['sha1_hash'])){
header("HTTP/1.0 200 OK"); //отвечаем
//проверяем хеш, обрабатываем ответ
}