title: PHP multiple file download
body: <p>I've seen this example on the <a href="http://php.net/manual/en/function.readfile.php" rel="noreferrer"><code>documentation for PHP readfile</code></a></p>
  
  <pre><code>&lt;?php
  $file = 'monkey.gif';
  
  if (file_exists($file)) {
      header('Content-Description: File Transfer');
      header('Content-Type: application/octet-stream');
      header('Content-Disposition: attachment; filename='.basename($file));
      header('Content-Transfer-Encoding: binary');
      header('Expires: 0');
      header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
      header('Pragma: public');
      header('Content-Length: ' . filesize($file));
      ob_clean();
      flush();
      readfile($file);
      exit;
  }
  ?&gt;
  </code></pre>
  
  <p>How can you <strong>make it so It download multiple files</strong> say <code>monkey.gif</code> and <code>girraffe.jpg</code></p>
  
  <p><strong>Preferably without</strong> <code>ZIP</code> <strong>files...</strong></p>