landing.php

<?php
namespace Bitrix\Landing\Controller;
 
use Bitrix\Landing\Landing as LandingCore;
use Bitrix\Main\Engine\Controller;
 
class Landing extends Controller
{
    public function getDefaultPreFilters(): array
    {
        return [
            new \Bitrix\Main\Engine\ActionFilter\Authentication(),
            new ActionFilter\Extranet()
        ];
    }
 
    public function getByIdAction(int $landingId): ?array
    {
        $res = LandingCore::getList([
            'select' => [
                '*'
            ],
            'filter' => [
                'ID' => $landingId
            ]
        ]);
        if ($row = $res->fetch())
        {
            $row['ADDITIONAL_FIELDS'] = LandingCore::getAdditionalFieldsAsArray($landingId);
            return $row;
        }
 
        return null;
    }
}