php 접속하면 파일 다운로드 바로 가기

<?
$file_name = 'test.html';
if(strstr($HTTP_USER_AGENT, "MSIE 5.5")) {
header("Content-Type: doesn/matter");
header("Content-Disposition: filename=$file_name");
header("Content-Transfer-Encoding: binary");
header("Pragma: no-cache");
header("Expires: 0");
}
else {
Header("Content-type: file/unknown");
Header("Content-Disposition: attachment; filename=$file_name");
Header("Content-Description: PHP3 Generated Data");
header("Pragma: no-cache");
header("Expires: 0");
}
?>