how to remove a active connections with API PHP?

hi, i need remove active connections from PPPOE of a single user from with PHP API

paste a capture screen.

Thanks!!!

<?php
use PEAR2\Net\RouterOS;
require_once 'PEAR2_Net_RouterOS-1.0.0b5.phar';

$util = new RouterOS\Util($client = new RouterOS\Client('192.168.88.1', 'admin', 'password'));

$util->setMenu('/ppp active')->remove('user1');  

(where “user1” is the name of the user you want to remove)

Or if you want to remove by some other criteria, say, the “address”, use a query instead of the name, e.g.

<?php
use PEAR2\Net\RouterOS;
require_once 'PEAR2_Net_RouterOS-1.0.0b5.phar';

$util = new RouterOS\Util($client = new RouterOS\Client('192.168.88.1', 'admin', 'password'));

$util->setMenu('/ppp active')->remove(RouterOS\Query::where('address', '10.2.2.80'));  

Sorry, routeros_api.class.php use. my syntax is similar to the following but no found

by terminal I run this command: interface pppoe-server remove

<?php include('routeros_api.class.php'); $Username="laklfasd"; $Pass="sadasjkdaskljd"; $api_puerto=8728; $usuario = 'asdjlkasdl'; $ipRouteros = 'asdñaksdl'; //$comando = 'interface pppoe-server remove '; $API = new routeros_api(); $API->debug = true; if ($API->connect($ipRouteros , $Username , $Pass, $api_puerto)) { $API->comm("interface pppoe-server remove "); } ?>