index.php page code for Google OAuth Login in PHP
//index.php
//Include Configuration File
include('config.php');
$login_button = '';
if(isset($_GET["code"]))
{
$token = $google_client->fetchAccessTokenWithAuthCode($_GET["code"]);
if(!isset($token['error']))
{
$google_client->setAccessToken($token['access_token']);
$_SESSION['access_token'] = $token['access_token'];
$google_service = new Google_Service_Oauth2($google_client);
$data = $google_service->userinfo->get();
if(!empty($data['given_name']))
{
$_SESSION['user_first_name'] = $data['given_name'];
}
if(!empty($data['family_name']))
{
$_SESSION['user_last_name'] = $data['family_name'];
}
if(!empty($data['email']))
{
$_SESSION['user_email_address'] = $data['email'];
}
if(!empty($data['gender']))
{
$_SESSION['user_gender'] = $data['gender'];
}
if(!empty($data['picture']))
{
$_SESSION['user_image'] = $data['picture'];
}
}
}
if(!isset($_SESSION['access_token']))
{
$login_button = '<a href="'.$google_client->createAuthUrl().'">Login With Google</a>';
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>PHP Login using Google Account</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<br />
<h2 align="center">PHP Login using Google Account</h2>
<br />
<div class="panel panel-default">
<?php
if($login_button == '')
{
echo '<div class="panel-heading">Welcome User</div><div class="panel-body">';
echo '<img src="'.$_SESSION["user_image"].'" class="img-responsive img-circle img-thumbnail" />';
echo '<h3><b>Name :</b> '.$_SESSION['user_first_name'].' '.$_SESSION['user_last_name'].'</h3>';
echo '<h3><b>Email :</b> '.$_SESSION['user_email_address'].'</h3>';
echo '<h3><a href="logout.php">Logout</h3></div>';
}
else
{
echo '<div align="center">'.$login_button . '</div>';
}
?>
</div>
</div>
</body>
</html>