private function unique_arr($data)
    {

        $temp = array();
        foreach ($data as $key => $datum) {

            $k = $datum[‘site‘].",{$datum[‘no‘]},{$datum[‘code‘]},{$datum[‘type‘]}"; //降维,将需要联合唯一的字段拼接为成一个字符串做数组的键
            $temp[$k] = $datum;

        }

        $temp_final = [];
        foreach ($temp as $v){
            $temp_final[] = $v;   //再将拆开的数组重新组装
        }

        return $temp_final;
    }