TP5混合查询 and or 联合查询写法

$keyword = $post['keyword'];
$keyword=isset($keyword) && !empty($keyword) ? trim($keyword) : null;
$where=[];
if(!is_null($keyword)){
      $where['u.nikename | f.remarks | u.user_login'] = ['like', "%" . $keyword . '%'];
}
$where['f.user_id'] = 1;
$res = db('focuses')->alias('f')->join('users u','f.fans_id = u.id','LEFT')->where($where)->select();

其实就是这个or的关系问题，用这种方式就可以啦