title: Add 30 days to date
body: <p>Hello all i am trying to add 30 days to my date. I am using below coding.</p>
  
  <pre><code>&lt;?php
  $next_due_date = date('05/06/2016', strtotime("+30 days"));
  echo $next_due_date;
  ?&gt;
  </code></pre>
  
  <p>But it is returning to "05/06/2016" only!</p>
  
  <p>Please help me!</p>