强制文件下载与PHP：损坏的文件，已经尝试了几个解决方案

问题描述

已发布，但我已经尝试了许多在SO和更多的解决方案（如下所示：）

This has been posted, but I've tried lot of solutions found on SO and more (like this: http://davidwalsh.name/php-force-download)

我基本上是这样的：

{
    $filePath = '../public/myfile.png';
    $fileName = basename($filePath);
    $fileSize = filesize($filePath);


    if (!is_file) {
        die("File not found");
    } else {
        header("Content-Description: File Transfer");
        header('Content-Type: application/octet-stream');
        header("Content-Disposition: attachment; filename= " . $fileName);
        header("Content-Transfer-Encoding: binary");
        readfile($filePath);
    }
}

文件被识别和下载，但是.PNG是空的和.DOCs已损坏（Word要求我修复文件，那就没关系）。我也尝试过PDF，而且没有问题。

Files are recognized and downloaded, but .PNGs are empty and .DOCs are corrupted (and Word asks me to fix the file, then it's ok). I have tried also PDFs, and no problem with that.

我尝试将所有选项（Pragma，Cache-Control，Expires，Content-Length等） ），仍然下载的文件，但以某种方式损坏...

I trues to put all sort of options (Pragma, Cache-Control, Expires, Content-Length, etc.), still downloaded files but corrupted in some way...

你有没有我的问题？请考虑我在IIS 7.5上

Did you ever had my problem? Please consider I'm on IIS 7.5

提前感谢

推荐答案

使用纯文本编辑器打开下载的文件，如。在顶部你会发现一个PHP错误通知，它会告诉你出了什么问题。

Open the downloaded files with a plain text editor like Notepad++. At the top you will find a PHP Error notice, it will tell you what's going wrong.

错误可能是会话已发送。然后在脚本开头添加 ob_start（）; 。

The error is probably "session already send". Then add ob_start(); at the beginning of your script.

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