What are potential pitfalls when using PHP to generate download links?

One potential pitfall when using PHP to generate download links is exposing sensitive file paths or information in the URL. To avoid this, it is recommended to use a system that generates unique, temporary download links that expire after a certain period of time or number of downloads. 

<?php
// Generate a unique token for the download link
$token = md5(uniqid(rand(), true));

// Store the token in a database with the file path and expiration time

// Generate the download link with the token
$download_link = "http://example.com/download.php?token=" . $token;

echo '<a href="' . $download_link . '">Download File</a>';
?>

Keywords

file permissions file paths security vulnerabilities header function file downloads

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