Correct cross-browser force CSV

download.php

<?php
$filename = "my-csv-file-".date("Y-m-d").".csv";

ob_start( ini_get('zlib.output_compression')? 'ob_gzhandler' : '' );

header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: public");
header("Cache-Control: max-age=0");
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

$agent = trim($_SERVER['HTTP_USER_AGENT']);
if ((preg_match('|MSIE ([0-9.]+)|', $agent, $version)) || (preg_match('|Internet Explorer/([0-9.]+)|', $agent, $version))) {
	header('Content-Type: application/force-download');
	if ($version == '5.5') {
		header('Content-Disposition: filename="' . $filename . '"');
	} else {
		header('Content-Disposition: attachment; filename="' . $filename . '"');
	}
} else {
	header('Content-type: application/vnd.ms-excel');
	header('Content-Disposition: inline; filename="' . $filename.'"');
}
?>