yes, try sessions... works just fine.. 🙂
How they works? check here, see examples there..
session_start(); //add on top of all those 3 pages...
$info1 = $_POST['info1']; //need more work here to check/cleanup the variable
$_SESSION['info1'] = $info1; //simply adding captured variable to session...
I would suggest you to add your information to array on the first page and then feed it to session, later you can get them out the way you have added..