从服务器php下载文件 [英] Download files from server php

问题描述

我有一个URL，用于保存工作中的某些项目，它们大部分是MDB文件，但也有一些JPG和PDF.

I have a URL where I save some projects from my work, they are mostly MDB files, but some JPG and PDF are there too.

我需要做的是列出该目录中的每个文件(已经完成)，并为用户提供下载文件的选项.

What I need to do is to list every file from that directory (already done) and give the user the option to download it.

使用PHP如何实现?

推荐答案

要读取目录内容，可以使用

To read directory contents you can use readdir() and use a script, in my example download.php, to download files

if ($handle = opendir('/path/to/your/dir/')) {
    while (false !== ($entry = readdir($handle))) {
        if ($entry != "." && $entry != "..") {
            echo "<a href='download.php?file=".$entry."'>".$entry."</a>\n";
        }
    }
    closedir($handle);
}

在download.php中，您可以强制浏览器发送下载数据，并使用 basename()进行确保客户端不会传递其他文件名，例如../config.php

In download.php you can force browser to send download data, and use basename() to make sure client does not pass other file name like ../config.php

$file = basename($_GET['file']);
$file = '/path/to/your/dir/'.$file;

if(!file_exists($file)){ // file does not exist
    die('file not found');
} else {
    header("Cache-Control: public");
    header("Content-Description: File Transfer");
    header("Content-Disposition: attachment; filename=$file");
    header("Content-Type: application/zip");
    header("Content-Transfer-Encoding: binary");

    // read the file from disk
    readfile($file);
}

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