parse string to time in PHP
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1665702/time-calculation-in-php-add-10-hours">Time calculation in php (add 10 hours)?</a>  </p>
</blockquote>



<p>I want to parse a string to time and than add some hours/minutes to it. 
for example string is "12:30 AM ET"</p>

<ol>
<li>Deduct 30 minutes from this time.</li>
<li>Add 2.5 hours to it.</li>
</ol>

<p>Please help.</p>
