// Laravel:
 $tempImage = tempnam(sys_get_temp_dir(), $filename);
 copy('https://my-cdn.com/files/image.jpg', $tempImage);
 return response()->download($tempImage, $filename);

// Core php:
$archive_name = 'pathtoarchivearch1.tar';
$dir_path = 'pathtodir';

$archive = new PharData($archive_name);
$archive->buildFromDirectory($dir_path); // make pathtoarchivearch1.tar
$archive->compress(Phar::GZ); // make pathtoarchivearch1.tar.gz
unlink($archive_name); // deleting pathtoarchivearch1.tar