How to Force Download File from Remote Server in PHP

Usually we download the files hosted in same server using php, but in this tutorial we are showing how to download a file hosted in remote server.

// File in remote host
$url = 'https://img.youtube.com/vi/HvCpSfkNrms/maxresdefault.jpg';

//download
header("Content-type: application/x-file-to-save"); 
header("Content-Disposition: attachment; filename=".basename($url));
ob_end_clean();
readfile($remoteURL);
exit;