PHP download file code (compatible with ie6 browser)

$filename = "./".$_REQUEST['name']; //Specific path, as long as $filename is the full path of the file you want to download
if (!is_file($ filename)) {//Check whether the file exists.
 die('The downloaded file seems to have eloped with someone!');
}
$filepath = str_replace('\', '/', realpath($filename)) ;
$filesize = filesize($filepath);
$filename = substr(strrchr('/'.$filepath, '/'), 1);
$extension = strtolower(substr(strrchr($filepath, '.' ), 1));
 // use this unless you want to find the mime type based on extension, file suffix format, not interpreted.
$mime = array('application/octet-stream');
header('Content -Type: '.$mime);
header('Content-Disposition: attachment; filename="'.$filename.'"');
header('Content-Transfer-Encoding: binary');
header(' Content-Length: '.sprintf('%d', $filesize));
header('Expires: 0');
// check for IE only headers, cheating IE detection, you know.
if (isset ($_SERVER['HTTP_USER_AGENT']) &&((strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false)))
{
 header('Cache-Control: must-revalidate, post-check =0, pre-check=0');
 header('Pragma: public');
} // bbs.it-home.org
else
{
 header('Pragma: no-cache');
}
$handle = fopen($filepath, 'rb');
fpassthru($handle);
fclose($handle);

Instructions: The above code was found by Brother Feng from a foreign website and can be used for personal testing.

The script editor collected and organized it, thank the original author Feng Ge for producing it~~~