<?php
require 'openid.php';
try {
    $openid = new LightOpenID;
    if(!$openid->mode) {
        if(isset($_GET['login'])) {
            $openid->identity = 'https://www.google.com/accounts/o8/id';
			$openid->required = array('namePerson/first', 'namePerson/last', 'contact/email');
            header('Location: ' . $openid->authUrl());
        }
?>
<a href="<?php echo $_SERVER['PHP_SELF'] . "?login"?>">Login with Google</a>
<?php
    } elseif($openid->mode == 'cancel') {
        echo 'User has canceled authentication!';
    } else {
		if($openid->validate())
		{			
			echo 'User <b>' . $openid->identity . '</b> has logged in.<br>';
 
			echo "<h3>User information</h3>";
 
			$identity = $openid->identity;
			$attributes = $openid->getAttributes();
			$email = $attributes['contact/email'];
			$first_name = $attributes['namePerson/first'];
			$last_name = $attributes['namePerson/last'];
 
			echo "mode: " . $openid->mode . "<br>";
			echo "identity: " . $identity . "<br>";
			echo "email: " . $email . "<br>";
			echo "first_name: " . $first_name . "<br>";
			echo "last_name: " . $last_name . "<br>";
		}
		else
		{
			echo 'User ' . $openid->identity . 'has not logged in.';
		}
    }
} catch(ErrorException $e) {
    echo $e->getMessage();
}
?>