Pass Paremeter to Middleware 传递变量

我只能说这种方式实在太神奇，居然是用冒号连接。

public function __construct(){

$path='manage/user';

$this->middleware('CheckUserGroup:'.$path);

}

public function handle($request, Closure $next, $path)

{

$permit = false;

if (Auth::user()) {

$user_class = Auth::user()->user_class();

$sidebar=Sidebar::where('url',$path)->first();

if ($user_class>=$sidebar->visible){

$permit=true;

}

if($permit==true){

return $next($request);

}else{

return redirect('/')->withErrors('Sorry, you\'re not authorized to visit that page.');

}