Are there any best practices or recommendations for handling file downloads and temporary directories in PHP scripts to prevent unexpected browser behavior?

When handling file downloads in PHP scripts, it's important to set appropriate headers to indicate that the response is a file download and not a regular webpage. Additionally, it's recommended to use a temporary directory to store the file before sending it to the user to prevent unexpected browser behavior. This helps ensure that the file is downloaded correctly and securely.

<?php
// Set headers for file download
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="example.txt"');

// Create a temporary directory for storing the file
$uploadDir = sys_get_temp_dir();
$filePath = $uploadDir . '/example.txt';

// Write content to the temporary file
file_put_contents($filePath, 'This is an example file content.');

// Send the file to the user
readfile($filePath);

// Delete the temporary file after sending it
unlink($filePath);
?>