สอบถามเรื่อง การ Export to excel ครับ แต่ถ้าจะปรับให้มันรายงานออกเป็น LibreOffice จะได้ไหมครับ

<?php
/**
* PHPExcel
*
* Copyright (C) 2006 - 2011 PHPExcel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPExcel
* @package PHPExcel
* @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.7.6, 2011-02-27
*/

/** Error reporting */
error_reporting(E_ALL);

date_default_timezone_set('Europe/London');

/** PHPExcel */
require_once '../joe/Classes/PHPExcel.php';


// Create new PHPExcel object
echo date('H:i:s') . " Create new PHPExcel object\n";
$objPHPExcel = new PHPExcel();

// Set properties
echo date('H:i:s') . " Set properties\n";
$objPHPExcel->getProperties()->setCreator("Maarten Balliauw")
->setLastModifiedBy("Maarten Balliauw")
->setTitle("Office 2007 XLSX Test Document")
->setSubject("Office 2007 XLSX Test Document")
->setDescription("Test document for Office 2007 XLSX, generated using PHP classes.")
->setKeywords("office 2007 openxml php")
->setCategory("Test result file");


// Add some data
echo date('H:i:s') . " Add some data\n";
$objPHPExcel->setActiveSheetIndex(0)
->setCellValue('A1', 'num_id')
->setCellValue('B1', 'saller')
->setCellValue('C1', 'list')
->setCellValue('D1', 'price')
->setCellValue('E1', 'telno')
->setCellValue('F1', 'conei')
->setCellValue('G1', 'by_name')
->setCellValue('H1', 'date');

// Write data from MySQL result
$objConnect = mysql_connect("root","joe","91199") or die("Error Connect to Database");
$objDB = mysql_select_db("joe");
$strSQL = "SELECT * FROM buymaster";
$objQuery = mysql_query($strSQL);
$i = 2;
while($objResult = mysql_fetch_array($objQuery))
{
$objPHPExcel->getActiveSheet()->setCellValue('A' . $i, $objResult["num_id"]);
$objPHPExcel->getActiveSheet()->setCellValue('B' . $i, $objResult["saller"]);
$objPHPExcel->getActiveSheet()->setCellValue('C' . $i, $objResult["list"]);
$objPHPExcel->getActiveSheet()->setCellValue('D' . $i, $objResult["price"]);
$objPHPExcel->getActiveSheet()->setCellValue('E' . $i, $objResult["telno"]);
$objPHPExcel->getActiveSheet()->setCellValue('F' . $i, $objResult["conei"]);
$objPHPExcel->getActiveSheet()->setCellValue('G' . $i, $objResult["by_name"]);
$objPHPExcel->getActiveSheet()->setCellValue('H' . $i, $objResult["date"]);
$i++;
}
mysql_close($objConnect);

// Rename sheet
echo date('H:i:s') . " Rename sheet\n";
$objPHPExcel->getActiveSheet()->setTitle('My Customer');


// Set active sheet index to the first sheet, so Excel opens this as the first sheet
$objPHPExcel->setActiveSheetIndex(0);


// Save Excel 2007 file
echo date('H:i:s') . " Write to Excel2007 format\n";
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$strFileName = "myData.xlsx";
$objWriter->save($strFileName);


// Echo memory peak usage
echo date('H:i:s') . " Peak memory usage: " . (memory_get_peak_usage(true) / 1024 / 1024) . " MB\r\n";

// Echo done
echo date('H:i:s') . " Done writing file.\r\n";
?>