download - PHPExcel how to zip -

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i can't find example show how zip xlsx file. idea want create few xlsx files , zip , force archive downloaded. if write example. best if xlsx or zip files wouldnt stay @ server disc. great if on fly creating files->zipping->download.

to save 1 xlsx file im doing this:

    header('content-type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');     header('content-disposition: attachment;filename="user&host_'.date('d-m-y').'.xlsx"');     header('cache-control: max-age=0');      $objwriter = phpexcel_iofactory::createwriter($objphpexcel, 'excel2007');     $objwriter->save('php://output');


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