title: add one year to datetime with php
body: <pre><code>$data['user']['time'] = '2011-03-07 00:33:45';    
  </code></pre>
  
  <p>how can we add 1 year to this date ?</p>
  
  <p>something like <code>$newdata = $data['user']['time'] + 1 year</code> ?</p>
  
  <p>or </p>
  
  <pre><code>$newdata = 2012-03-07 00:33:45
  </code></pre>
  
  <p>Thanks</p>
  
  <p>Adam Ramadhan</p>