Check whether timestamp to present has been 3 hours - php
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/8771981/check-if-timestamp-is-x-hours-old">Check if timestamp is x hours old?</a>  </p>
</blockquote>



<p>How do I determine whether it has been 3 hours or more from a <code>timestamp</code> (formatted like <code>2012-08-06 18:22:02</code>) to the current time, in PHP.</p>
