Why doesn't regex work in router?

Question

PHP

Here is the router
$app->get('/{id:(9|11)}', 'HomeController:index');
Here is the error:

Regex "(9|11)" for parameter "id" contains a capturing group

How to register correctly so that the router accepts only two id - 9, 11?

Answer 1

Everything, of course, depends on the internals of this router, but this is how it will most likely work:(?:9|11)