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好吧，所以我得到了这个带有中间件的语言环境系统，问题是当我输入语言“hu”时，它第一次没有设置它，它通常只在我第二次设置时才起作用......

网页.php

Route::get('set_language/{locale}', function ($locale) {
    Session::forget('my_locale');
    session(['my_locale' => $locale]);
    return Redirect::back();
});

HTTP/中间件中的 Language.php

<?php namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Illuminate\Foundation\Application;

class Language {

    public function __construct(Application $app, Request $request) {
        $this->app = $app;
        $this->request = $request;
    }

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $this->app->setLocale(session('my_locale', config('app.locale')));

        return $next($request);
    }

}

当然，我在我的Kernel.php中添加了几个看起来正确的地方 

namespace App\Http;

use Illuminate\Foundation\Http\Kernel as HttpKernel;

class Kernel extends HttpKernel
{
    /**
     * The application's global HTTP middleware stack.
     *
     * These middleware are run during every request to your application.
     *
     * @var array
     */
    protected $middleware = [
        \App\Http\Middleware\TrustProxies::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\Language::class,
    ];

    /**
     * The application's route middleware groups.
     *
     * @var array
     */
    protected $middlewareGroups = [
        'web' => [
            \App\Http\Middleware\EncryptCookies::class,
            \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
            \Illuminate\Session\Middleware\StartSession::class,
            // \Illuminate\Session\Middleware\AuthenticateSession::class,
            \Illuminate\View\Middleware\ShareErrorsFromSession::class,
            \App\Http\Middleware\VerifyCsrfToken::class,
            \Illuminate\Routing\Middleware\SubstituteBindings::class,
            \App\Http\Middleware\Language::class,
        ],

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

    /**
     * The application's route middleware.
     *
     * These middleware may be assigned to groups or used individually.
     *
     * @var array
     */
    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,
        'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
        'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
        'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
    ];

    /**
     * The priority-sorted list of middleware.
     *
     * This forces non-global middleware to always be in the given order.
     *
     * @var array
     */
    protected $middlewarePriority = [
        \Illuminate\Session\Middleware\StartSession::class,
        \App\Http\Middleware\Language::class,
        \Illuminate\View\Middleware\ShareErrorsFromSession::class,
        \App\Http\Middleware\Authenticate::class,
        \Illuminate\Session\Middleware\AuthenticateSession::class,
        \Illuminate\Routing\Middleware\SubstituteBindings::class,
        \Illuminate\Auth\Middleware\Authorize::class,
    ];
}

编辑：我忘了提，但在 config/app.php 我已经这样设置了

'locale' => 'rs',
'locales' => ['rs', 'hu'],
'fallback_locale' => 'rs',
'available_locale' => ['rs', 'hu'],

所以现在如果我开始了localhost:8000/set_language/rs它就可以了，但是如果我这样做localhost:8000/set_language/hu了，它只有在我做了两次之后才有效。

我尝试转储会话密钥my_locale，它保持为“rs”，直到我执行set_language/hu两次

那么我该怎么做呢？前往：localhost:8000/set_language/hu 再次前往：localhost:8000/set_language/hu

现在它工作...

为什么不是第一次设置？

加起来，如果您正在测试这个，请先尝试将您的语言环境设置为RS，然后再尝试将其设置为HU

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