public function __invoke(MvcEvent $e)
{
$exception = $e->getParam('exception');
//it is just a sample, you can create service for logger
$writer = new \Zend\Log\Writer\Stream('./data/logs/' . date('Y-m-d') . '-log.txt');
$log = new \Zend\Log\Logger();
$log->addWriter($writer);
$log->err($exception);
}
