default_option.php

См. документацию.

<?php
$landing_default_option = array(
    'site_template_id' => 'landing24',
    'deleted_lifetime_days' => '30',
    'history_lifetime_days' => '30',
    'rights_extended_mode' => 'N',
    'public_hook_on_save' => 'Y',
    'portal_url' => $_SERVER['HTTP_HOST'] ?? null
);