Simple PHP script to allow downloading a file only once, after which it is deleted or renamed.

one-time-download.php

<?php
if ($_POST["submit"]) {

    $file_name = '/srv/users/path/to/filename.zip';


    // make sure it's a file
    if (is_file($file_name)) {


        // required for IE
        if (ini_get('zlib.output_compression')) {
            ini_set('zlib.output_compression', 'Off');
        }

        // get the file mime type using the file extension
        switch (strtolower(substr(strrchr($file_name, '.'), 1))) {
            case 'pdf': $mime = 'application/pdf'; break;
            case 'zip': $mime = 'application/zip'; break;
            case 'jpeg':
            case 'jpg': $mime = 'image/jpg'; break;
            default: $mime = 'application/force-download';
        }
        header('Pragma: public'); 	// required
    header('Expires: 0');		// no cache
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Last-Modified: '.gmdate('D, d M Y H:i:s', filemtime($file_name)).' GMT');
        header('Cache-Control: private', false);
        header('Content-Type: '.$mime);
        header('Content-Disposition: attachment; filename="'.basename($file_name).'"');
        header('Content-Transfer-Encoding: binary');
        header('Content-Length: '.filesize($file_name));	// provide file size
        header('Connection: close');
        readfile($file_name);		// push it out
        unlink("/srv/users/path/to/filename.zip");
        // rename("/srv/users/path/to/filename.zip", "/srv/users/path/to/filename-donloaded.zip");
        // optionally rename file instead of deleting
        exit();
    }

}
?>

<form action="" method="POST">
	<a class="btn" href="http://yoursite.com/filename.zip" download>
		<input type="submit" name="submit" value="Download This File">
	</a>
</form>


<style>
input{
	background: #673AB7;
	color: #fff;
	padding: 20px;
	font-size: 15px;
	cursor:pointer;
}
</style>