Using The Solarwinds IPmonitor API WSDL Webservice With SOAP And XPATH

<?php
function dumpDOMnodeList($xml)
{
    //USED TO DUMP THE XPATH RESULTS
    $docTmp = new DOMDocument();
    foreach($xml as $n) $docTmp->appendChild($docTmp->importNode($n,true));
    print_r($docTmp->saveHTML());
}

$soapVersion = '1.2';
$soapLocation = 'https://domain.com/soap/status.asmx?WSDL';
$soapContext = stream_context_create(array('ssl' => array('verify_peer' => FALSE)));
$soapParameters = array (
            'location' => $soapLocation,
            'login' => 'login',
            'password' => 'password',
            'stream_context' => $soapContext
            );         

//IPM.WSDL IS A LOCAL COPY OF STATUS.ASMX?WSDL
$soapClient = new SoapClient('ipm.wsdl',$soapParameters); 

//GET GROUPS
/*
$soapRequest = '<?xml version="1.0" encoding="utf-8"?>';
$soapAction = 'http://schemas.ipmonitor.com/ipm70/GetGroups';
*/

//GET MONITORS
/*MAIN GROUP WITHIN IPM, NEVER CHANGES CAN BE OBTAINED BY USING "GetGroups" METHOD... 
IT IS THE MAIN gtGroup ID WRAPPING THE RESPONSE*/
$groupID = 'XXXXXXXXXXXX'; 
$justTrouble = 'TRUE'; // ONLY RETURN DISTRESSED MONITORS

$soapRequest = '<?xml version="1.0" encoding="utf-8"?>'.$groupID.''.$justTrouble.'';
$soapAction = 'http://schemas.ipmonitor.com/ipm70/GetMonitors';

$soapResult = $soapClient->__doRequest($soapRequest, $soapLocation, $soapAction, $soapVersion); //REQUEST, LOCATION, ACTION, VERSION

$doc = new DOMDocument();
$doc->LoadXML($soapResult);

$xpath = new DOMXpath($doc);
$xpath->registerNamespace('soap', 'http://schemas.xmlsoap.org/soap/envelope/');
$xpath->registerNamespace('def', 'http://schemas.ipmonitor.com/ipm70/'); 

$alerts = $xpath->query("/soap:Envelope/soap:Body/def:GetMonitorsResponse/def:GetMonitorsResult/def:rtMonitor");

dumpDOMnodeList($alerts);
?>