What is a hook in Slim Framework?

Hooks are function in Slim framework that is used/ register as callbacks. Slim Provides a wide range of Hooks. slim.before, slim.before.router, slim.before.dispatch, slim.after are few default hooks that used in Slim.

Note: Hooks are used in Slim version 2.x and completely removed in Slim 3.x.

Using Hook in Slim Framework:

&lt?php
$app = new \Slim\Slim();
$app->hook('the.hook.name', function () {
    //Do something
});