Neos\Flow\Http\Request::createFromEnvironment PHP Method

    public static function createFromEnvironment()
    {
        $request = new static($_GET, $_POST, $_FILES, $_SERVER);
        $request->setContent(null);
        return $request;
    }

 /**
  * @return ControllerContext
  */
 protected function createControllerContextFromEnvironment()
 {
     $httpRequest = Request::createFromEnvironment();
     /** @var ActionRequest $request */
     $request = new ActionRequest($httpRequest);
     $uriBuilder = new UriBuilder();
     $uriBuilder->setRequest($request);
     return new ControllerContext($request, new Response(), new Arguments(array()), $uriBuilder);
 }