g-callback.php

<?php
	require_once "finalconfig.php";
	if (isset($_SESSION['access_token']))
		$gClient->setAccessToken($_SESSION['access_token']);
	else if (isset($_GET['code'])) {
		$token = $gClient->fetchAccessTokenWithAuthCode($_GET['code']);
		$_SESSION['access_token'] = $token;
	} else {
		header('Location: index.php');
		exit();
	}
	$oAuth = new Google_Service_Oauth2($gClient);
	$userData = $oAuth->userinfo_v2_me->get();
	$_SESSION['id'] = $userData['id'];
	$_SESSION['email'] = $userData['email'];
	$_SESSION['gender'] = $userData['gender'];
	$_SESSION['imgurl'] = $userData['picture'];
	$_SESSION['familyName'] = $userData['familyName'];
	$_SESSION['name'] = $userData['givenName']." ".$userData['familyName'];
	
	
	$sqlque="select * from users where email='".$userData['email']."'";
	$res_u=mysqli_query($con,$sqlque);
	
	if (mysqli_num_rows($res_u) > 0) {
		header('Location: dashboard.php');
		exit();
	}
	else{
	$sql="insert into users (name,email,google_id,imgurl) values
 ('".$userData['givenName']." ".$userData['familyName']."','".$userData['email']."',
 '".$userData['id']."','".$userData['picture']."')";
	mysqli_query($con,$sql);
	header('Location: password.php');
	exit();
	}
?>