Php 下载的Rar显示意外的存档结束错误

我想通过php脚本将远程文件流式传输给用户。 现在我有两个函数

function dl_file_resumable($file, $is_resume=TRUE, $type, $name, $length, $header)
{


    //Gather relevent info about file
    $size = remotefilesize($file);
    $fileinfo = pathinfo($file);

    //workaround for IE filename bug with multiple periods / multiple dots in filename
    //that adds square brackets to filename - eg. setup.abc.exe becomes setup[1].abc.exe
    $filename = (strstr($_SERVER['HTTP_USER_AGENT'], 'MSIE')) ? preg_replace('/\./', '%2e', $fileinfo['basename'], substr_count($fileinfo['basename'], '.') - 1) : $fileinfo['basename'];


    //check if http_range is sent by browser (or download manager)
    if($is_resume && isset($_SERVER['HTTP_RANGE']))
    {
        list($size_unit, $range_orig) = explode('=', $_SERVER['HTTP_RANGE'], 2);

        if ($size_unit == 'bytes')
        {
            //multiple ranges could be specified at the same time, but for simplicity only serve the first range
            //http://tools.ietf.org/id/draft-ietf-http-range-retrieval-00.txt
            list($range, $extra_ranges) = explode(',', $range_orig, 2);
        }
        else
        {
            $range = '';
        }
    }
    else
    {
        $range = '';
    }

    //figure out download piece from range (if set)
    list($seek_start, $seek_end) = explode('-', $range, 2);

    //set start and end based on range (if set), else set defaults
    //also check for invalid ranges.
    $seek_end = (empty($seek_end)) ? ($size - 1) : min(abs(intval($seek_end)),($size - 1));
    $seek_start = (empty($seek_start) || $seek_end < abs(intval($seek_start))) ? 0 : max(abs

(intval($seek_start)),0);

    //add headers if resumable
    if ($is_resume)
    {
        //Only send partial content header if downloading a piece of the file (IE workaround)
        if ($seek_start > 0 || $seek_end < ($size - 1))
        {
            header('HTTP/1.1 206 Partial Content');
        }

        header('Accept-Ranges: bytes');
        header('Content-Range: bytes '.$seek_start.'-'.$seek_end.'/'.$size);
    }

    //headers for IE Bugs (is this necessary?)
    //header("Cache-Control: cache, must-revalidate");   
    //header("Pragma: public");

    header('Content-Type: ' . $type);
    header('Content-Disposition: attachment; filename="' . $name . '"');
   header('Content-Length: '.($seek_end - $seek_start + 1));
    //header('Content-Length: '.$length);

    //open the file
    $fp = fopen($file, 'rb');
    //seek to start of missing part
    fseek($fp, $seek_start);

    //start buffered download
    while(!feof($fp))
    {
        //reset time limit for big files
        set_time_limit(0);
        print(fread($fp, 1024*8));
        flush();
        ob_flush();
    }

    fclose($fp);
    exit;
}

我通过谷歌搜索得到了这段代码，并对其进行了一些修改。 问题是，我用远程rar文件尝试了这个脚本。但是当下载rar文件时，当我尝试打开它时，它会显示错误。“存档意外结束”。 这个脚本有什么问题

我不是php专家，所以我需要你的明确答案。一切帮助都将不胜感激。谢谢：）

问题解决了！！ 实际上，在我的真实代码中，

dl\u file\u resubable

函数中有一个回声。。

---

这将导致echo附加到下载的文件中，并更改文件的大小和代码。。我使用hex编辑器检测到这个问题，并在我的rar源代码中看到了回音文本。

经过1-2个小时的不确定之后，你的回答就像来自天堂的信号。在使用readfile（）之前，我有一些echo和print\r。谢谢

function remotefilesize($url, $user = "", $pw = "")
{
    ob_start();
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLOPT_NOBODY, 1);

    if(!empty($user) && !empty($pw))
    {
        $headers = array('Authorization: Basic ' .  base64_encode("$user:$pw"));
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    }

    $ok = curl_exec($ch);
    curl_close($ch);
    $head = ob_get_contents();
    ob_end_clean();

    $regex = '/Content-Length:\s([0-9].+?)\s/';
    $count = preg_match($regex, $head, $matches);

    return isset($matches[1]) ? $matches[1] : "unknown";
}