Exporter Un XLSX en lecteur seul ou par mot de passe

include 'PHPExcel.php';
include 'PHPExcel/Writer/Excel2007.php';

$workbook = new PHPExcel;

$sheet =	$workbook->getActiveSheet();
$sheet->setCellValue('A1','MaitrePylos');

$writer = new PHPExcel_Writer_Excel2007($workbook);


 header('Content-type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
 header('Content-Disposition:inline;filename=Fichier.xlsx ');
 $writer->save('php://output');