lumen增加多语言功能

先增加一个中间件app/Http/Middleware/App.php

<?php

namespace App\Http\Middleware;

use Closure;

class App {

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        app(‘translator‘)->setLocale($request->input(‘lang‘));

        return $next($request);
    }
}

然后在bootstrap/app.php里注册为全局中间件

$app->middleware([
    App\Http\Middleware\App::class,
    // ...
]);

resource目录下增加lang文件夹：

resources/lang/cn/messages.php内容实例：

<?php

return [
    ‘validation_failed‘ => ‘验证失败。‘,
];

代码里调用翻译：

use Illuminate\Support\Facades\Lang;

// ...
$output = Lang::get(‘messages.validation_failed‘);

然后url里加上lang=cn就可以显示翻译后的内容了。