title: After downloading zip folder the code next to it is not working
body: <p>I am working with PHP code igniter i wrote below code to download the file.
  Which reads file and download it as zip. It working fine. But when i write other code below download it stop working. For example if i echo the sum two digit it wont work. Will any one guide me on this.</p>
  <pre><code>$this-&gt;zip-&gt;read_file($path);
  $filename= &quot;zip-name&quot;;
  $done = $this-&gt;zip-&gt;download($filename);
  </code></pre>
  <p>//Below code not working</p>
  <pre><code>$a=10;
  $b=10;
  echo $a+$b;
  </code></pre>