title: Server Side Timer using PHP for web application
body: <p>I am developing a quiz page showing one question at a time. I want to create a timer of 15 minutes using PHP with the following functionality:</p>
  
  <ul>
  <li>a) The timer should update every one minute and should be bound with
  a div.</li>
  <li>b) When the timer expires a certain code should execute.</li>
  <li>c)
  The page should not be updated only the dive containing the timer
  should be updated.</li>
  <li>d) The page should not be freezed i.e. sleep
  function should not be used.</li>
  </ul>