PHPExcel แปลง excel เป็น pdf ทำยังไงครับ ลองหาตัวอย่างมาทำแล้วก็ไม่ได้ครับ

<?php
/** Error reporting */
error_reporting(E_ERROR);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
//date_default_timezone_set('Europe/London');
 
if (PHP_SAPI == 'cli')
    die('This example should only be run from a Web Browser');
 
/** Include PHPExcel */
require_once 'class/class_phpexcel/PHPExcel.php';

 
 
//  Change these values to select the Rendering library that you wish to use
//      and its directory location on your server
$rendererName = PHPExcel_Settings::PDF_RENDERER_TCPDF;
//$rendererName = PHPExcel_Settings::PDF_RENDERER_MPDF;
//$rendererName = PHPExcel_Settings::PDF_RENDERER_DOMPDF;
//$rendererLibrary = 'tcPDF5.9';
$rendererLibrary = 'TCPDF';
//$rendererLibrary = 'domPDF0.6.0beta3';
$rendererLibraryPath = 'class/libraries/PDF/' . $rendererLibrary;
 
 
// Create new PHPExcel object
$objPHPExcel = new PHPExcel();
 
// Set document properties
$objPHPExcel->getProperties()->setCreator("Maarten Balliauw")
                             ->setLastModifiedBy("Maarten Balliauw")
                             ->setTitle("PDF Test Document")
                             ->setSubject("PDF Test Document")
                             ->setDescription("Test document for PDF, generated using PHP classes.")
                             ->setKeywords("pdf php")
                             ->setCategory("Test result file");
 
 
// Add some data
$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A1', 'Hello')
            ->setCellValue('B2', 'world!')
            ->setCellValue('C1', 'Hello')
            ->setCellValue('D2', 'world!');
 
// Miscellaneous glyphs, UTF-8
$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A4', 'Miscellaneous glyphs')
            ->setCellValue('A5', 'กกกก');
 
// Rename worksheet
$objPHPExcel->getActiveSheet()->setTitle('Simple');
$objPHPExcel->getActiveSheet()->setShowGridLines(false);
 
// Set active sheet index to the first sheet, so Excel opens this as the first sheet
$objPHPExcel->setActiveSheetIndex(0);
 
 
if (!PHPExcel_Settings::setPdfRenderer(
        $rendererName,
        $rendererLibraryPath
    )) {
    die(
        'NOTICE: Please set the $rendererName and $rendererLibraryPath values' .
        '<br />' .
        'at the top of this script as appropriate for your directory structure'
    );
}
 
 
// Redirect output to a client’s web browser (PDF)
header('Content-Type: application/pdf');
header('Content-Disposition: attachment;filename="doc1.pdf"');
header('Cache-Control: max-age=0');
 
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'PDF');
$objWriter->save('php://output');
exit;
?>