How to add an hour onto the time of this datetime string?
<p>Here's an example of the datetime strings I am working with:</p>

<pre><code>Tue May 15 10:14:30 +0000 2012
</code></pre>

<p>Here is my attempt to add an hour onto it:</p>

<pre><code>$time = 'Tue May 15 10:14:30 +0000 2012';
$dt = new DateTime($time);
$dt-&gt;add(new DateInterval('P1h'));
</code></pre>

<p>But the second line gives the error that it couldn't be converted.</p>

<p>Thanks.</p>
