title: PHP session starter detect for visitor counting
body: <p>Is there a way to find out on session being started. Like for instance the session start event in the global.ascx file of .net. The requirement is to find the no. of visits the user has done on the site. <br/></p>
  
  <p>Instead of checking each time during posts or gets to the server. Is there something in php to find out if the session is a new one. Zen framework is also used for the app.</p>