What is Hook in Slim Framework and how it is used?

1.	What is Hook in Slim Framework and how it is used?
Answer» In the Slim Framework, a hook is used to register a callback. Identified by string names, a hook is an instance at which the callables will get invoked as PER the PRIORITY LIST assigned. It is POSSIBLE to attach multiple callables to a single hook by using the hook() METHOD.

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