My excel file code is as below...
$dte=date('d-m-Y',strtotime($dt));
$fname='Logsheet_'.$dte.'_Zone_' .$zone_id.'.xls';
$filename='Backup.xls'; //save our workbook as this file name
header('Content-Type: application/vnd.ms-excel'); //mime type
header('Content-Disposition: attachment;filename="'.$fname.'"'); //tell browser what's the file name
header('Cache-Control: max-age=0'); //no cache
//save it to Excel5 format (excel 2003 .XLS file), change this to 'Excel2007' (and adjust the filename extension, also the header mime type)
//if you want to save it as .XLSX Excel 2007 format
$objWriter = PHPExcel_IOFactory::createWriter($this->excel, 'Excel5');
//force user to download the Excel file without writing it to server's HD
$objWriter->save('php://output');
And then I want to know, how can I change this code, as I can put multiple excel files, into a single zip file as output.