if (isset($_POST['login_openid'])) {
	$consumer = new Zend_OpenId_Consumer();
	
	if (!$consumer->login($_POST['login_openid'])) {
		echo $consumer->getError() . "<hr />";
		exit("failed on openid login");
	}
} elseif (isset($_GET['openid_mode'])) {
	if ($_GET['openid_mode'] == 'id_res') {
		$consumer = new Zend_OpenId_Consumer();
		if ($consumer->verify($_GET, $id)) {
			/* block of pseudo code, you probably want to use $id (the user's openid identifier) to retrieve the appropriate user id from your database or something  */
			$query = "check your database for $id";
			$data = "get the row from $query response";
			if (!$data) {
				exit("openid doesnt exist in db, failed openid login: $id");
			}
			$userid = $data['userid'];
		} else {
			exit("invalid id");
		}
	} else {
		exit("failed on openid_mode");
	}
}