php - Laravel 5 | 未找到接口“Illuminate\Contracts\Routing\Middleware”

Question

我使用 Laravel 5。

我试试，

 "use Illuminate\Contracts\Routing\Middleware;"

将“中间件”实现为，

class Language implements Middleware {
       // Some Functions 
  }

我得到错误，

Interface 'Illuminate\Contracts\Routing\Middleware' not found

实际上那个接口是 Missing 吗？

（或）定义错误？

（或）需要创建 | 下载 ？

谢谢问！

Answer 1

Illuminate\Contracts\Routing\Middleware 合约在 5.2 中已被弃用，请将其删除。并且不要在类定义中使用它。

像这样

<?php namespace App\Http\Middleware;

use Closure;
use Illuminate\Routing\Redirector;
use Illuminate\Http\Request;
use Illuminate\Foundation\Applicaion;

class Language{
    //..... YOUR CODE
}

Answer 2

我不知道您是否真的放置了那些双引号，但这是一个工作示例：

<?php

use Illuminate\Contracts\Routing\Middleware;

class Language implements Middleware {
   // Some Functions 
}

Answer 3

我的课 ：

命名空间应用\Http\中间件；

use Closure;

use Illuminate\Routing\Redirector;
use Illuminate\Http\Request;
use Illuminate\Foundation\Application;
use Illuminate\Contracts\Routing\Middleware;

class Language implements Middleware {

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

/**
 * Handle an incoming request.
 *
 * @param  \Illuminate\Http\Request  $request
 * @param  \Closure  $next
 * @return mixed
 */
public function handle(Closure $next, $request)
{
    // Make sure current locale exists.
    $locale = $request->segment(1);

    if ( ! array_key_exists($locale, $this->app->config->get('app.locales'))) {
        $segments = $request->segments();
        $segments[0] = $this->app->config->get('app.fallback_locale');

        return $this->redirector->to(implode('/', $segments));
    }

    $this->app->setLocale($locale);

    return $next($request);
}

 }

LOC： App/Http/Middleware/Language.php