Get total time difference between two dates using php
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/676824/how-to-calculate-the-difference-between-two-dates-using-php">How to calculate the difference between two dates using PHP?</a>  </p>
</blockquote>



<p>Here i mention two times with its date</p>

<blockquote>
  <p>2008-12-13 10:42:00</p>
  
  <p>2010-10-20 08:10:00</p>
</blockquote>

<p>I want to get total time difference in (h:m:s)  format</p>
