federated-wordpress-customizations/rest-api/get_dns_records_test.php

<?php

if( ! defined( 'ABSPATH' ) ){
    exit; // Exit if accessed directly.
}

add_action('rest_api_init', 'federated_route_get_dns');

function federated_route_get_dns(){
    //register routes here
    register_rest_route(
        'federated-rest/v1',
        'get-dns',
        array(
            'methods' => 'GET',
            'callback' => 'federated_get_dns',
            'permissions_callback' => 'check_federated_permissions'
        )
    );
}

function federated_get_dns($request){
    $hostname = $request['hostname'];
    
    $dns = dns_get_record($hostname);

    return $dns;
}