한글다운로드시 파일명이 깨져서 나옵니다. 채택완료

</p><p><?php
include_once('./_common.php');</p><p> </p><p>$order = sql_real_escape_string($_GET['order']);
$cart = sql_real_escape_string($_GET['cart']);
$no = sql_real_escape_string($_GET['no']);</p><p>$no = (int)$no;</p><p>if (!$is_admin) {
    $alert_msg = '\\n\\n다운로드 권한이 없습니다.\\n\\n관리자로 로그인 후 다시 시도해주십시오.\\n\\n';
    alert($alert_msg, G5_BBS_URL.'/login.php?url='.urlencode(G5_SHOP_URL.'/attach_download.php?order='.$order.'&cart='.$cart.'&sf_no='.$no));
}</p><p>$sql = " select sf_source, sf_file, sf_datetime from {$g5['g5_shop_attach_file']} where od_id = '$order' and ct_id = '$cart' and sf_no = '$no' ";</p><p>$file = sql_fetch($sql);</p><p>if (!$file['sf_file'])
    alert_close('파일 정보가 존재하지 않습니다.');</p><p>$ym = substr(str_replace('-', '', $file['sf_datetime']), 2, 4);
$filepath = G5_DATA_PATH.'/odattach/'.$ym.'/'.$file['sf_file'];
$filepath = addslashes($filepath);</p><p>if (!is_file($filepath) || !file_exists($filepath))
    alert('파일이 존재하지 않습니다.');</p><p>$g5['title'] = '다운로드 > '.conv_subject($file['sf_source'], 255);</p><p>$original = (preg_match("/msie/i", $_SERVER['HTTP_USER_AGENT'])) ? urlencode($file['sf_source']) : $file['sf_source'];</p><p>if(preg_match("/msie/i", $_SERVER['HTTP_USER_AGENT']) && preg_match("/5\.5/", $_SERVER['HTTP_USER_AGENT'])) {
    header("content-type: doesn/matter");
    header("content-length: ".filesize("$filepath"));
    header("content-disposition: attachment; filename=\"$original\"");
    header("content-transfer-encoding: binary");
} else {
    header("content-type: file/unknown");
    header("content-length: ".filesize("$filepath"));
    header("content-disposition: attachment; filename=\"$original\"");
    header("content-description: php generated data");
}
header("pragma: no-cache");
header("expires: 0");
flush();</p><p>$fp = fopen($filepath, 'rb');</p><p>$download_rate = 10;</p><p>while(!feof($fp)) {
    print fread($fp, round($download_rate * 1024));
    flush();
    usleep(1000);
}
fclose ($fp);
flush();
?> </p><p>