launchrock

In an include file on all pages...

if(isset($_GET['invite']) && is_numeric($_GET['invite'])) {
        $cookie = getCookie('invite');
        if(!$cookie) {
                bakeCookie('invite', $_GET['invite'], $_SERVER['REQUEST_TIME']+30*3600*24);
        } else {
                if(strpos($cookie, $_GET['invite'].'_') === false && strpos($cookie, '_'.$_GET['invite']) === false && $cookie != $_GET['invite']) {
                        bakeCookie('invite', $cookie.'_'.$_GET['invite'], $_SERVER['REQUEST_TIME']+30*3600*24);
                }
        }
}

In the code that signs users up...

if(isset($_COOKIE['invite'])) {
	$invite = $_COOKIE['invite'];
	if(strpos($invite, '_') !== false) {
		$inviters = explode('_', $invite);
		foreach($inviters as $inviter) {
			if(is_numeric($inviter)) {
				$inviterUser = new user();
				$inviterUser->i($inviter, false, false, false, array('id','numReferals','referals'));
				$numReferals = $inviterUser->_numReferals;
				if(!isset($numReferals)) {
					$numReferals = 0;
				}
				$inviterUser->f('numReferals', $numReferals+1);
				$inviterUser->f('referals', $user->_id.',');
			}
		}
	} elseif(is_numeric($invite)) {
		$inviterUser = new user();
		$inviterUser->i($invite, false, false, false, array('id','numReferals','referals'));
		$numReferals = $inviterUser->_numReferals;
		if(!isset($numReferals)) {
			$numReferals = 0;
		}
		$inviterUser->f('numReferals', $numReferals+1);
		$inviterUser->f('referals', $user->_id.',');
	}
}