1.创建中间件

在app/Http/Middleware 下创建同一个php文件文件内容

<?php

namespace App\Http\Middleware;
use Illuminate\Http\Response;
use Closure;

class CheckToken
{
   /**
    * Handle an incoming request.
    *
    * @param \Illuminate\Http\Request $request
    * @param \Closure $next
    * @return mixed
    */
   public function handle($request, Closure $next)
   {
       return $next($request);
   }
}

可通过Artisan 快速创建

php artisan make:middleware CheckToken

2.注册中间件

支持全局中间件 ----------在 protected $middleware 下配置

protected $middleware = [
        \App\Http\Middleware\TrustProxies::class,
        \Fruitcake\Cors\HandleCors::class,
        \App\Http\Middleware\CheckForMaintenanceMode::class,
        \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,
        \App\Http\Middleware\TrimStrings::class,
        \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
        \App\Http\Middleware\CheckToken::class, 新注册的全局中间件
    ];

分配中间件到指定路由 在protected $routeMiddleware 下配置

protected $routeMiddleware = [
        'auth' => \App\Http\Middleware\Authenticate::class,
        'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
        'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
        'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
        'can' => \Illuminate\Auth\Middleware\Authorize::class,
        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
        'password.confirm' => \Illuminate\Auth\Middleware\RequirePassword::class,
        'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
        'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
        'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
        'CheckToken' => \App\Http\Middleware\CheckToken::class,   //新注册中间件
    ];

分配中间件

-------------------单个路由分配单个中间件-----------------
Route::get('/', function () {
    //
})->middleware('token');
-----------------单个路由分配多个中间件-------------

Route::get('/', function () {
    //
})->middleware('token', 'auth');
---------------给一组路由分配多个中间件----------------------

Route::middleware(['first', 'second'])->group(function () {
    Route::get('/', function () {
        // Uses first & second Middleware
    });
    Route::get('user/profile', function () {
        // Uses first & second Middleware
    });
});