PHP Download MP3 files from directory on server

<?php

$fileName = $_GET['file'];
$path = '/directory/contains/mp3/';
$file = $path.$fileName;

if (!file_exists($file)) {
    http_response_code(404);
    die();
}

header("Cache-Control: private");
header("Content-type: audio/mpeg3");
header("Content-Transfer-Encoding: binary");
header("Content-Disposition: attachment; filename=".$fileName);
//So the browser can display the download progress
header("Content-Length: ".filesize($file));

readfile($file);

header("Content-type: application/mp3");
header("Content-Disposition: attachment; filename=".$s['song_name']);
header('Pragma: no-cache');
header('Expires: 0');
//So the browser can display the download progress
readfile('uploads/'.$s['song_mp3']);
exit;