在laravel 5.6中命名路由组中数组到字符串的转换

Route::group(['prefix' => 'admin', 'as' => 'admin.'], function () {
    Route::get('dashboard', ['as' => 'dashboard', 'uses' => 'AdminController@dashboard']);
    Route::get('users', ['as' => 'users', 'uses' => 'AdminController@users']);
    Route::get('settings', ['as' => 'settings', 'uses' => 'AdminController@settings']);
});

$routes = [
    route('admin.dashboard'),
    route('admin.users'),
    route('admin.settings'),
];

$routeString = implode(',', $routes);

echo $routeString;

admin.dashboard,admin.users,admin.settings