//我发展的代理（下级）
    public function next_agency(){
        $agency_uid=1950;
        $search=I('get.search');
        $p_num = 20;
        $p = $_REQUEST['p'] ? $_REQUEST['p'] : 1;
        $page_begin = ($p - 1)*$p_num;
        $where=[];
        if(!empty($search)){
            //不同字段相同查询条件
            $where['agency_uid|nickname'] = $search;
        }

        $where['agency_pid']=$agency_uid;
        $list=M('agency_copy')->field('agency_uid,nickname,mobile,level')->order('agency_uid desc')->limit("$page_begin,$p_num")->where($where)->select();
        print_r($list);die;

    }