获取树状分类结构

php代码

    /**
     * @param $data//数据集合
     * @param $pid
     *
     * @return array|string
     */
    public function getTree($data, $pid)
    {
        $tree = array();
        foreach ($data as $k => $v) {
            if ($v['parent_id'] == $pid) {
                $child = $this->getTree($data, $v['id']);
                if ($child) {
                    $v['childs'] = $child;
                }
                $tree[] = $v;
            }
        }

        return $tree;
    }