Downloading as csv/excel file in php using headers

header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false);
header("Content-Type: application/vnd.ms-excel" );
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"".date("Y-m-d").".csv\";");
header("Content-Transfer-Encoding:� binary");
header("Content-Length: ".strlen($output));