What is Route callbacks and explain its arguments?
Each routing method in Slim Framework will accept a callback routine as the final argument. The last case may be any PHP callable.
By default, the framework allows three arguments - Request, Response, arguments.
An argument is a function that specifies the actions to be taken when a route is matched to a request. It includes values for the existing route’s specific placeholders.
BY Best Interview Question ON 30 Jan 2019