public static function header_file($doc,$file,$title,$type='Excel5'){
if(!empty($doc)){
$objWriter = self::writer_excel($doc,$title, $type); //excel写入方法
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
//header("Content-Disposition: attachment; filename=".urlencode($file));
$ua = $_SERVER["HTTP_USER_AGENT"];
$encoded_file = urlencode($file);
$encoded_file = str_replace("+", "%20", $encoded_file);
if (preg_match("/MSIE/", $ua)) {
header('Content-Disposition: attachment; filename="' . $encoded_file . '"');
} else if (preg_match("/Firefox/", $ua)) {
header('Content-Disposition: attachment; filename*="utf8\'\'' . $file . '"');
} else {
header('Content-Disposition: attachment; filename="' . $file . '"');
}
header("Content-Transfer-Encoding: binary");
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Pragma: no-cache");
$objWriter->save('php://output');
}
}
}