Capture php api error

RouterOS Scripting
1

Capture php api error

I am trying to capture the errors returned in api php … for example if a user already exists

<?php

//require('routeros_api.class.php');
require './routeros_api.class';
$API = new routeros_api();
$API->debug = false;
if ($API->connect('192.168.1.1', 'admin', '123')) {

  $API->comm("/ppp/secret/add", array(
          "name"     => "user",
          "password" => "pass",
          "remote-address" => "172.16.1.10",
          "comment"  => "{new VPN user}",
          "service"  => "pptp",
));
  
 // this is where I want to capture if an error occurs
  //example delphi
  if Res.Trap then
     echo "Error ".ROS.LastError
 
  
   $API->disconnect();
   
   

} else echo "Error al conectar a MK"
?>

I do it in delphi follows
// this is where I want to capture if an error occurs
//example delphi
if Res.Trap then
echo "Error ".ROS.LastError

regards