PHP calc difference between time greater than 24 hours
<p>What is the best way to calculate the difference in time, when time is greater than 24 hours.</p>

<p><strong>Example</strong></p>

<pre><code>$time1 = '76:00:00';
$time2 = '30:00:00';

// result should be 46:00:00
echo date('H:i:s', strtotime($time1) - strtotime($time2));
</code></pre>

<p>But this could not be done with this because its greater then 24 hours.</p>

<p>Also in a database i've stored a time like this: 33:30:00
How in php could i format it to: 33:30</p>