php檔下載(防止中文檔名亂碼)的範例程式碼

/**
* php文件下载代码，中文无乱码
* by bbs.it-home.org
*/
    $file = "/tmp/中文名.tar.gz";

    $filename = basename($file);

    header("Content-type: application/octet-stream");

    //处理中文文件名
    $ua = $_SERVER["HTTP_USER_AGENT"];
    $encoded_filename = urlencode($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 . '"');
    }

    header('Content-Disposition: attachment; filename="' . $filename . '"');
    header("Content-Length: ". filesize($file));
    readfile($file);

另外，有兴趣的朋友，可以研究下apache服务器中的module mod_xsendfile模块，可以用它来提高PHP发送文件的效率。