How can one ensure that uploaded files are not hidden or have restricted access in FTP when using PHP?

To ensure that uploaded files are not hidden or have restricted access in FTP when using PHP, you can set the correct permissions for the uploaded files using the `chmod` function. By setting appropriate permissions, you can ensure that the files are accessible to the FTP server and other users as needed.

// Set the correct permissions for the uploaded file
$filename = 'path/to/uploaded/file.txt';
chmod($filename, 0644);