laravel session reading problem

Question

As shown below:

在生成验证码的时候，将其存到session中，在验证的时候用Session::get 取不到值

Answer 1

Usually this kind of problem is caused by not placing the routing under the web middleware

Answer 2

protected $middlewareGroups = [
        //中间件web
        'web' => [
            \App\Http\Middleware\EncryptCookies::class,
            \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
            //看到这里了吗！StartSession！！！！要把路由放在这个中间件了才会启动Session！！
            \Illuminate\Session\Middleware\StartSession::class,
            \Illuminate\View\Middleware\ShareErrorsFromSession::class,
            \App\Http\Middleware\VerifyCsrfToken::class,
        ],

        'api' => [
            'throttle:60,1',
        ],
    ];
    

Kernel.php
----------
两种路由中间件写法各人喜好！
Route::get('/', function () {
    //路由放在这里
})->middleware('web');

Route::group(['middleware' => ['web']], function () {
    //路由放在这里
});

routes.php