title: Add number of days to a date
body: <p>I want to add  number of days to current date:
  I am using following code:</p>
  
  <pre><code>$i=30;
  echo $date = strtotime(date("Y-m-d", strtotime($date)) . " +".$i."days");
  </code></pre>
  
  <p>But instead of getting proper date i am getting this:
  <strong>2592000</strong> </p>
  
  <p>Please suggest.</p>