Binding of IP address with Session id

Question

To prevent the session fixation problem, how can we bind the IP address with the session id? Is it possible to bind the session id with that of the IP address??

Answer 1

http://en.wikipedia.org/wiki/Session_fixation

if($_SERVER['REMOTE_ADDR'] != $_SESSION['PREV_REMOTEADDR']) {
   session_destroy(); // destroy all data in session
}
session_regenerate_id(); // generate a new session identifier
$_SESSION['PREV_REMOTEADDR'] = $_SERVER['REMOTE_ADDR'];