laravel 中间件

创建中间件命令

php artisan make:middleware CheckLogin

执行完以上命令会在app/Http/Middleware目录下创建一个新的中间件类CheckLogin.php。
创建完以后还需要注册中间件在app/Http/Kernel.php中：

protected $routeMiddleware = [

       'auth' => \Illuminate\Auth\Middleware\Authenticate::class,

       'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,

       'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,

       'can' => \Illuminate\Auth\Middleware\Authorize::class,

       'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,

       'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,

       //这就是新注册的中间件

       'checklogin' => \App\Http\Middleware\CheckLogin::class,    ];

可以在刚创建的中间件里写验证如下：

<?php

namespace App\Http\Middleware;

use Closure;

use Illuminate\Support\Facades\Session;

class CheckLogin{

    /**

     * Handle an incoming request.

     *

     * @param  \Illuminate\Http\Request  $request

     * @param  \Closure  $next

     * @return mixed

     */

    public function handle($request, Closure $next)

    {

        $userid = Session::get('_userid');        

        $login_sts = Session::get('_login_sts');        

        if (empty($userid) || empty($login_sts)){            

        return response()->view('admin/login');

        }        

        return $next($request);

    }

}

接着就是怎么使用中间件功能了

Route::group(['namespace'=>'Admin','middleware'=>'checklogin'],function (){    

Route::get('admins','IndexController@index');    

Route::get('logout','IndexController@logout');});

这里直接使用的是路由群组，只要把路由放在群组之中都会经过这个验证，[‘namespace’=>’Admin’]是命名空间，[‘middleware’=>’checklogin’]这就是中间件验证，之前注册时注册名为checklogin，所以middleware后直接写checklogin就可以了