In ZF2 manipulate the response - php

Question

I am developing rest web services using zend 2.
For error handling I am using below mentioned code in Module.php
public function onBootstrap(MvcEvent $e)
{
$eventManager = $e->getApplication()->getEventManager();
$moduleRouteListener = new ModuleRouteListener();
$moduleRouteListener->attach($eventManager);
$eventManager->attach(MvcEvent::EVENT_DISPATCH_ERROR, array(
$this,
'onDispatchError'
), 0);
$eventManager->attach(MvcEvent::EVENT_RENDER_ERROR, array(
$this,
'onRenderError'
), 0);
}
public function onDispatchError($e)
{
return $this->getJsonModelError($e);
}
public function onRenderError($e)
{
return $this->getJsonModelError($e);
}
/*
* Manages error's and return response_code and error message
*
* #return Zend\View\Model\JsonModel
*/
public function getJsonModelError($e)
{
$error = $e->getError();
if (! $error) {
return;
}
$response = $e->getResponse();
$sm = StaticServiceManager::getDefaultServiceManager();
$config = $sm->get('config');
$err_code = $response->getStatusCode();
$err_msg = $response->getReasonPhrase();
$response_code = $config['HTTP_ERROR'][$err_code]['response_code'];
$errorJson = array(
'response_code' => $response_code,
// 'status' => $err_code,
'message' => $err_msg
);
$model = new JsonModel($errorJson);
$e->setResult($model);
return $model;
}
However there are still cases which are not tracked by this approach. For e.g. Invalid HTTP method passed. Does there any way I can check final response and manipulate it e.g. I can check final response content-type & http status code to finally change the response to send some meaning full json message.