What are the potential reasons for a file download working on localhost but not on a server in PHP?

The potential reasons for a file download working on localhost but not on a server in PHP could be due to differences in server configurations or permissions. To solve this issue, you can check if the file path is correct, ensure that the file exists on the server, and verify that the server has the necessary permissions to access and download the file.

<?php
$file_path = '/path/to/your/file.txt';

if (file_exists($file_path)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="' . basename($file_path) . '"');
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($file_path));
    readfile($file_path);
    exit;
} else {
    echo 'File not found.';
}
?>