<?php

ini_set( 'soap.wsdl_cache_enabled', 0 );

$wsdl = 'HPD_IncidentRelationshipInterface_WS.wsdl';
$parameters = array( 'Qualification' => '\'Assigned Group\' = "SOPORTE" AND \'Status\' = "Pending"', 'startRecord' => '0', 'maxLimit' => '10' );

$client = new SoapClient( $wsdl, array( 'trace' => 1 ) );

$auth = new stdClass();
$auth->userName = 'USUARIO';
$auth->password = 'CONTRASEÑA';

$authvalues = new SoapVar( $auth, SOAP_ENC_OBJECT );

$header = new SoapHeader( 'REMEDY', 'AuthenticationInfo', $authvalues, false );

$client->__setSoapHeaders( array( $header ) );

$data = $client->GetListOfRelatedIncidents( $parameters );

var_dump( $data->getListValues );