title: php working with time only
body: <p>I'm using timestamp in my php script to handle time in hours, minutes and seconds. Timestamps also record the date but I'm only using time <code>00:00:00</code>.</p>
  
  <p>For instance I'm caluclate difference in time </p>
  
  <pre><code>$start = strtotime("12:00:00");
  $end = strtotime("20:00:00");
  
  $difference = $end - $start;
  </code></pre>
  
  <p>or dividing time</p>
  
  <p><code>$divide = $difference/3;</code></p>
  
  <p>Should I continue using timestamps for these operations or is there a time-specific function in php?</p>