middleware role et definotion code example

Example 1: middleware

//just for me lol... pls don't delete
"middleware" - code that runs before the final route call back.
They are in the middle of the beginning of the route and the 
callback function.

Example 2: laravel middleware

<?php

namespace App\Http\Middleware;

use Closure;

class CheckAge
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        if ($request->age <= 200) {
            return redirect('home');
        }

        return $next($request);
    }
}