01_递归函数

/**
     * 二级数组，带字段cate_id,p_id等
     * 递归 
     */
    public function recursion($list,$pId=0)
    {
        $data = [];
        foreach ($list as $value) {
            if ($value['p_id'] == $pId) {
                foreach ($list as $val) {
                    if ($value['cate_id'] === $val['p_id']) {
                        $next_cates = $this->recursion($list,$val['cate_id']);
                        $val = array_merge($val,$next_cates);
                        $value['next_cates'][] = $val;
                    }
                }
                $data[] = $value;
            }
            
        }
        return $data;
    }

转载于:https://my.oschina.net/wuxueshi/blog/1558032