// FUNCTION TO FORCE A DOWNLOAD
function force_download($filename)
{
// GET A NAME FOR THE FILE
$basename = basename($filename);
// GET THE CONTENTS OF THE FILE
$filedata = file_get_contents($filename);
if ($filedata)
{
// THESE HEADERS ARE USED ON ALL BROWSERS
header("Content-Type: application-x/force-download");
header("Content-Disposition: attachment; filename=\"$basename\"");
header("Content-length: ".(string)(strlen($filedata)));
header("Expires: ".gmdate("D, d M Y H:i:s", mktime(date("H")+2, date("i"), date("s"), date("m"), date("d"), date("Y")))." GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
// THIS HEADER MUST BE OMITTED FOR IE 6+
if (FALSE === strpos($_SERVER["HTTP_USER_AGENT"], 'MSIE '))
{
header("Cache-Control: no-cache, must-revalidate");
}
// THIS IS THE LAST HEADER
header("Pragma: no-cache");
// FLUSH THE HEADERS TO THE BROWSER
flush();
// CAPTURE THE FILE IN THE OUTPUT BUFFERS - WILL BE FLUSHED AT SCRIPT END
ob_start();
echo $filedata;
}
}
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