title: How can distinguish the request on HTTP from web browser or mobile device(app) in PHP?
body: <p>I am developing web site and mobile(iPhone/iPad, Android) app version.<br>
  A web site and mobile app is accessing to same URLs. e.g. <a href="http://xxx.xxx.xxx/register.php" rel="nofollow">http://xxx.xxx.xxx/register.php</a><br>
  So, as you know, on mobile apps there are no SESSION concept for PHP.<br>
  So, I need to distinguish what is the web browser requesting or app requesting for mobile device on the any requesting on single URL.<br>
  NOTE!!!! This is not the problem to distinguish the mobile web browser using USER AGENT property<br>
  How can I distinguish the request what is the request from browser(PC/Mobile Browser) ? or from mobile app?<br>
  And also, I hope not to use the $_GET[] variable for this problem when requesting.<br>
  Please help me.<br>
  <br>
  Kind regards</p>