laravel中分页带参数

//获取用户列表
public function getUsers(Request $request){
$users = User::select('id', 'xm', 'kh', 'mm')
->where(function($query) use($request){
if ($request->input('user_name')) {
$query->where('xm', 'like', '%'.$request->input('user_name').'%');
}
})
->orderby('id','asc')
->paginate(20);
$page = isset($page)?$request['page']:1;
$users = $users->appends(array(
'user_name'=>$request['user_name'],
'page'=>$page
));
return view('admin.list_user',['users' => $users]);
}

blade 模板文件页面输出

{!! $users->render() !!}