$app->post('/test/', function () {
  $putdata = fopen("php://input", "r");
  while(!feof($putdata)){echo fread($putdata, 1024);}
  fclose($putdata);
  var_dump($_POST);
  var_dump($_GET);
  var_dump($_FILES);
  var_dump($_REQUEST);
  $putdata = file_get_contents('php://input');
  var_dump($putdata);
  var_dump(json_decode(file_get_contents("php://input"), false));
});