Elgg plugin to count number of times a user has logged in

start.php

<?php
/**
 * Hook into the login, user event and increment the login count metadata.
 *
 * @param string   $event
 * @param string   $type
 * @param ElggUser $user
 */
function login_count($event, $type, $user) {
	$login_count = $user->login_count;
	$login_count++;
	$user->login_count = $login_count;

	if ($login_count == 10) {
		forward("url-to-forward-to");
	}
}

register_elgg_event_handler('login', 'user', 'login_count');