Denermisin :

ob_start();
session_start();
if(!empty($_SESSION["id"])){
$nereye='http://192.168.2.23/veriaktar.asp?username='.$_SESSION['username'].'&email='.$_SESSION['email'].'&oauth_id='.$_SESSION['oauth_id'].'&First_name='.$_SESSION['First_name'].'&Last_Name='.$_SESSION['Last_name'].'&oauth_provider='.$_SESSION['oauth_provider'];
header("Location:".$nereye);
exit();
}else{
header("Location:index2.php");
exit();
}