中间件的应用

控制器

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class AgeController extends Controller
{
    //
    public function index(){
        return "年龄测试";
    

    }
}

路由

// 年龄控制器路由
Route::get("d2/{age}",[AgeController::class,"index"])->middleware(CheckAge::class);
// Route::get("d2/{age}",[AgeController::class,"index"])->middleware(被使用的中间件的名字);
// 中间件重定向的路由
Route::get('d3',function(){
    return "你输入的年龄 <= 18";
});

创建中间件

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class CheckAge
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse)  $next
     * @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
     */
    public function handle(Request $request, Closure $next)
    {
        if($request->route('age') > 18){
            return $next($request);
        /**  return $next($request);  下一步， 继续向后走，继续
         * 向后访问控制器、视图、匿名函数等各种资源*/  
        }else{
            return redirect('d3');
        }

              


    }
}