// $getpost_array = array('1_pic', '2_pic', '3_pic', '4_pic', '5_pic');
        // $requred_array = array();
        // $data1 = $this->getpost->getpost_array($getpost_array, $requred_array);


        $file_array = array('1_pic', '2_pic', '3_pic', '4_pic', '5_pic');

        // foreach ($file_array as $key => $value) {
        //   $json_arr[] = $_FILES[$value];
        // }
        // echo json_encode($json_arr);
        $i = 1;
        foreach ($file_array as $key => $value) {
          if (isset($_FILES[$value]) && $_FILES[$value]['size'] != 0) {
            $name = $data['sn'] . '_' . $i . '.png';
            $config['upload_path'] = './upload/'; // 存放路徑
            $config['allowed_types'] = 'gif|jpg|png'; //
            $config['overwrite'] = true;
            $config['file_name'] = $name; // 文件名不使用原始名 (避免中文檔名錯誤)
            $this->load->library('upload', $config);
            $field_name = $value;
            // print_r($name);
            // echo json_encode($_FILES[$value]);
            if (!$this->upload->do_upload($value)) {
              // 失敗
              echo $this->upload->display_errors();
            } else {
              // 成功
              $file_data = $this->upload->data();
              // echo json_encode($file_data);
            }
          }
          $i = $i + 1;
        }