Социальная сеть

function sendMessageToUser($toUserId, $message, $fromUserId = '')
    {
        CModule::IncludeModule("im");
        $arMessageFields = [
            "TO_USER_ID" => $toUserId,
            "FROM_USER_ID" => $fromUserId,
            "NOTIFY_MESSAGE" => $message
        ];
        return CIMNotify::Add($arMessageFields);
    }

public static function sendNotification($message, $userTo, $userFrom) {
        if (\CModule::IncludeModule('im')) {
            $arFields = array(
                "MESSAGE_TYPE" => "S", // P - private chat, G - group chat, S - notification
                "TO_USER_ID" => $userTo,
                "FROM_USER_ID" => $userFrom,
                "MESSAGE" => $message,
                "NOTIFY_TYPE" => 4, // 1 - confirm, 2 - notify single from, 4 - notify single
                "NOTIFY_MODULE" => "main", // module id sender (ex: xmpp, main, etc)
                "NOTIFY_EVENT" => "IM_GROUP_INVITE", // module event id for search (ex, IM_GROUP_INVITE)
            );
            \CIMMessenger::Add($arFields);
        }
    }