How-to pass a variable to middleware per route

3

Thanks for point out it but as I have written I need to add an extra value when registering a route cause I’m already using name and grop.
I need to do something like

$dummy=“anything”;
$app->get(’/test’, function (Request $request, Response $response, array $args) use ($container) {
//empty
})->setCutom($dummy);

the value of $dummy will be retrieved in the middleware just like name and group

Thanks again for your answer