pear2 / Net_RouterOS

examples/Util/get-number.php

<?php
use PEAR2\Net\RouterOS;

require_once 'PEAR2/Autoload.php';

$util = new RouterOS\Util(
    $client = new RouterOS\Client('192.168.88.1', 'admin', 'password')
);
$util->setMenu('/ip arp');

//echoes "192.168.88.1", assuming an otherwise empty ARP list
echo $util->get(0, 'address');

Are you sure $util->get(0, 'address') of type null|resource|string can be used in echo?