我正在尝试使用路由控制器方法编写代码。但是我无法说明这个问题

Route::get('/',[
    'uses' => 'ProductController@getIndex','as' => 'product.index','do' => function()
{
    $url = parse_url(Request::fullUrl());
    $domain = explode('.',$url['host']);
    $subdomain = $domain[0];
    $name = DB::table('users')->where('name',$subdomain)->first();
    dd($name); 
    if ($name==true) {
    return url('/') . '/?ref=' .$name->id;
}}
]);