События (D7) #Bitrix

10-register.php

<?php require_once($_SERVER['DOCUMENT_ROOT'] . "/bitrix/modules/main/include/prolog_before.php");

use Bitrix\Main;

$eventManager = Main\EventManager::getInstance();
$eventManager->addEventHandler('moduleName', 'onEventName', function(Main\Event $event) {
	$arUser = $event->getParameter('user');
	$arUser['surname'] = 'Doe';

	$event->setParameter('user', $arUser);
});

20-execute.php

<?php require_once($_SERVER['DOCUMENT_ROOT'] . "/bitrix/modules/main/include/prolog_before.php");

use Bitrix\Main;

$arUser = ['name' => 'John'];
$event = new Main\Event('moduleName', 'onEventName', ['user' => $arUser]);
$event->send();

$arEventParams = $event->getParameters();

echo "<pre>";
var_dump( $arUser = $arEventParams['user'] );
echo "</pre>";