versioning.php

<?php

class VersioningHook
{
    public function beforeSendingResponse(Req $request, Res $response)
    {
        $version    = $request->headers->get('version');
        $eventName = "api-v$version.response"
        
        $this->eventDispatcher->dispatch($eventName, array(
            'request'   => $request,
            'response'  => $response,
        ));
    }
}