The use of Laravel middleware

1. Save directory between parts: App/http/middleware

2. Custom middleware:

(1) PHP artisan make:middleware [namemiddleware]//Generate in-between class templates

(2) in the App/http/middleware class in open creation, the handle method implements its own logic. //parameter one is the request, parameter two is the next middleware, can add other required parameters to parameter two.

(3) After writing its processing logic on the return $next ($request), it indicates that the middleware executes after the request, and vice versa after the request.

(4) Register middleware (make Effective): in the Routemiddleware array of the file app\http\kernel.php, add its own key value between the pieces.

(5) The second parameter in the route specifies the middleware to be used, [' middleware ' = ' + ' Middleware 1: parameters, middleware two ... ']

The use of Laravel middleware