What improvements can be made to the PHP script to enhance the user experience when downloading files?

The user experience when downloading files can be enhanced by providing feedback on the download progress and ensuring that the download starts promptly. One way to achieve this is by using AJAX to asynchronously handle the file download request and provide real-time feedback to the user. 

<?php
if(isset($_POST['file'])) {
    $file = $_POST['file'];
    $file_path = 'path/to/files/' . $file;

    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));

        ob_clean();
        flush();
        readfile($file_path);
        exit;
    } else {
        echo 'File not found.';
    }
}
?>

Keywords

file download user experience PHP script performance optimization error handling

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