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The SendResponseEvent — Zend Framework 2 2.3.9 documentation
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:
Currently, three listeners are listening to this event at different priorities based on which listener is used most.
|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.|
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.
This event is executed when MvcEvent::FINISH event is triggered, with a priority of -10000.