<?
$fichier_xls=$_GET['file_name'];

$fI="xls";

$sendmime = $mimetypes[$fI["fileext"]];
if ($sendmime == "") { $sendmime = "application/stream"; }

header ("HTTP/1.1 200 OK");
header("Content-type: ".$sendmime);
header("Content-Length: $tailleFichier");
header('Content-Transfer-Encoding: binary');
header("Content-Disposition: attachment; filename=\"$fichier_xls\"");
//readfile($fichier);
$fp=fopen($fichier_xls, "r");
fpassthru($fp);
flush();
?>