Ponsjuh

public function indexAction()
    {
        $events = $this->getEventManager();
        $events->attach('do', function($e) {
            $event  = $e->getName();
            $target = get_class($e->getTarget());
            $params = json_encode($e->getParams());
            $params = $e->getParams();
            
            printf("handled event '%s' with params %s", $event, json_encode($params));