导出文件在IE和火狐中文件名乱码问题的解决

$ua = $_SERVER["HTTP_USER_AGENT"];
		$filename = "客户数据.xls";
		$encoded_filename = urlencode($filename);
		$encoded_filename = str_replace("+", "%20", $encoded_filename);
		if (preg_match("/MSIE/", $ua)) {
			header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
		} else if (preg_match("/Firefox/", $ua)) {
			header('Content-Disposition: attachment; filename*="utf8\'\'' . $filename . '"');
		} else {
			header('Content-Disposition: attachment; filename="' . $filename . '"');
		}

数据导出，会有一些乱码问题，这是google到的解决方案，针对IE和FF做了不同的处理，IE文件名需要urlencode处理，FF需要加utf8前缀，真不知道这两种浏览器这是什么怪脾气....