The SendResponseEvent

The MVC layer of Zend Framework 2 also incorporates and utilizes a custom Zend\EventManager\Event implementation located at Zend\Mvc\ResponseSender\SendResponseEvent. This event allows listeners to update the response object, by setting headers and content.

The methods it defines are:

• setResponse($response)
• getResponse()
• setContentSent()
• contentSent()
• setHeadersSent()
• headersSent()

Listeners

Currently, three listeners are listening to this event at different priorities based on which listener is used most.

SendResponseEvent Listeners

Class	Priority	Method Called	Description
Zend\Mvc\SendResponseListener\PhpEnvironmentResponseSender	-1000	__invoke	This is used in context of HTTP (this is the most often used).
Zend\Mvc\SendResponseListener\ConsoleResponseSender	-2000	__invoke	This is used in context of Console.
Zend\Mvc\SendResponseListener\SimpleStreamResponseSender	-3000	__invoke

Because all these listeners have negative priorities, adding your own logic to modify Response object is easy: just add a new listener without any priority (it will default to 1) and it will always be executed first.

Triggerers

This event is executed when MvcEvent::FINISH event is triggered, with a priority of -10000.