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function xxooxxoo($filename, $mime=null, $len=0)
{
header('Content-Type: "' . $mime . '"');
header('Content-Disposition: attachment; filename="' . $filename . '"');
if (strpos(I('server.HTTP_USER_AGENT'), 'MSIE') !== false) {
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header("Content-Transfer-Encoding: binary");
header('Pragma: public');
}
else {
header("Content-Transfer-Encoding: binary");
header('Expires: 0');
header('Pragma: no-cache');
}
if($len) {
header("Content-Length: " . $len);
}
return true;
}