无限级别分类嵌套格式抓取

select id,ruid,nickname,telphone from tf_user limit 30;
+----+------+------------+-------------+
| id | ruid | nickname   | telphone    |
+----+------+------------+-------------+
|  1 |    0 | 候淑娥     | 15852052228 |
|  2 |    1 | 候淑娥1    | 15852052228 |
|  3 |    2 | 候淑娥2    | 15852052228 |
|  4 |    2 | 候淑娥3    | 15852052228 |
|  5 |    2 | 候淑娥4    | 15852052228 |
|  6 |    2 | 候淑娥5    | 15852052228 |
|  7 |    2 | 候淑娥6    | 15852052228 |
|  8 |    2 | 候淑娥7    | 15852052228 |
|  9 |    2 | 候淑娥8    | 15852052228 |
| 10 |    3 | 陈茹       | 15252185133 |
| 11 |   10 | 陈茹1      | 15252185133 |
| 12 |   10 | 陈茹2      | 15252185133 |
| 13 |   10 | 陈茹3      | 15252185133 |
| 14 |   10 | 陈茹4      | 15252185133 |
| 15 |   10 | 陈茹5      | 15252185133 |
| 16 |   10 | 陈茹6      | 15252185133 |
| 17 |   10 | 陈茹7      | 15252185133 |
| 18 |    3 | 张明裕     | 15295469779 |
| 19 |   18 | 张明裕1    | 15295469779 |
| 20 |   18 | 张明裕2    | 15295469779 |
| 21 |   18 | 张明裕3    | 15295469779 |
| 22 |   18 | 张明裕4    | 15295469779 |
| 23 |   18 | 张明裕5    | 15295469779 |
| 24 |   18 | 张明裕6    | 15295469779 |
| 25 |   18 | 张明裕7    | 15295469779 |
| 26 |    3 | 仝建立     | 15952131238 |
| 27 |   26 | 仝建立1    | 15952131238 |
| 28 |   26 | 仝建立2    | 15952131238 |
| 29 |   26 | 仝建立3    | 15952131238 |
| 30 |   26 | 仝建立4    | 15952131238 |
+----+------+------------+-------------+
30 rows in set (0.00 sec)

private function _getson($uid,$level)
{

    $sonlists = Db::name('user')
        ->where(['ruid' => $uid])
        ->order('id desc')
        ->field('id,ruid,top_uid,nickname,telphone')
        ->select();

    if ($sonlists) {
        foreach ($sonlists as $k => &$v) {
            $v['level'] = $level;
            $data = $this->_getson($v['id'],$level + 1);
            $v['nickname'] = $v['id'] . '-' . $v['nickname'];
            if ($data && $v['level'] < 3){         //&& $v['level'] < 10　　去掉可以无限级抓取；为了不展示太多数据而限制的　；
                $v['children'] = $data;
            }
        }
    }

    return $sonlists;

}

public function family()
{

    $info = Db::name('user')
        ->where(['id' => $_GET['top_uid']])
        ->order('id desc')
        ->field('id,ruid,top_uid,nickname,telphone')
        ->select();

    $child = $this->_getson($_GET['top_uid'],'2');
    $info[0]['children'] = $child;
    $this->assign('info', $info);
    dump($info);
    exit;

    $this->assign('model_name', '家族族谱');
    return $this->fetch();
}

array(1) {
  [0] => array(6) {
    ["id"] => int(1)
    ["ruid"] => int(0)
    ["top_uid"] => int(1)
    ["nickname"] => string(9) "候淑娥"
    ["telphone"] => string(11) "158520500008"
    ["children"] => array(1) {
      [0] => array(7) {
        ["id"] => int(2)
        ["ruid"] => int(1)
        ["top_uid"] => int(1)
        ["nickname"] => string(12) "2-候淑娥1"
        ["telphone"] => string(11) "1585200000"
        ["level"] => string(1) "2"
        ["children"] => array(7) {
          [0] => array(6) {
            ["id"] => int(9)
            ["ruid"] => int(2)
            ["top_uid"] => int(1)
            ["nickname"] => string(12) "9-候淑娥8"
            ["telphone"] => string(11) "15800002228"
            ["level"] => int(3)
          }
          [1] => array(6) {
            ["id"] => int(8)
            ["ruid"] => int(2)
            ["top_uid"] => int(1)
            ["nickname"] => string(12) "8-候淑娥7"
            ["telphone"] => string(11) "15800002228"
            ["level"] => int(3)
          }
          [2] => array(6) {
            ["id"] => int(7)
            ["ruid"] => int(2)
            ["top_uid"] => int(1)
            ["nickname"] => string(12) "7-候淑娥6"
            ["telphone"] => string(11) "158000028"
            ["level"] => int(3)
          }
          [3] => array(6) {
            ["id"] => int(6)
            ["ruid"] => int(2)
            ["top_uid"] => int(1)
            ["nickname"] => string(12) "6-候淑娥5"
            ["telphone"] => string(11) "158000052228"
            ["level"] => int(3)
          }
          [4] => array(6) {
            ["id"] => int(5)
            ["ruid"] => int(2)
            ["top_uid"] => int(1)
            ["nickname"] => string(12) "5-候淑娥4"
            ["telphone"] => string(11) "15800002228"
            ["level"] => int(3)
          }
          [5] => array(6) {
            ["id"] => int(4)
            ["ruid"] => int(2)
            ["top_uid"] => int(1)
            ["nickname"] => string(12) "4-候淑娥3"
            ["telphone"] => string(11) "158500002228"
            ["level"] => int(3)
          }
          [6] => array(6) {
            ["id"] => int(3)
            ["ruid"] => int(2)
            ["top_uid"] => int(1)
            ["nickname"] => string(12) "3-候淑娥2"
            ["telphone"] => string(11) "1585****28"
            ["level"] => int(3)
          }
        }
      }
    }
  }
}