Que tal a todos, de esta forma logro realizar el consumo de un web service utilizando la libreria de Nusoap
Código PHP:
require_once($path_fisico.'/modulo_webservice/nusoap/lib/nusoap.php');
$user= $usuario;
$pass= $password;
/*************************************************************************************************/
//ACCESA AL WEB SERVICE
/*************************************************************************************************/
/* NUEVO SOAP .NET */
// define the soapaction as found in the wsdl
$soapaction = "http://server/webservice/Gestion/Login";
// endpoint address
$wsdl = "http://servername/webServices/wsIntegracion/Gestion.asmx?wsdl";
$namespace = "http://namespace/wsIntegracion/Gestion";
$client = new soapclient($wsdl, array('trace' => 1));
// Serializar
$mysoapmsg = $client->serializeEnvelope('<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ges="http://namespace/wsIntegracion/Gestion">
<soapenv:Header/>
<soapenv:Body>
<ges:Login>
<!--Optional:-->
<ges:strXML><?xml version="1.0" encoding="ISO-8859-1" standalone="yes"?><EMANAGER.INPUT><TT>25</TT><ID-sistema>248</ID-sistema><datos><usuario>'.$user.'</usuario><clave>'.$pass.'</clave></datos></EMANAGER.INPUT></ges:strXML>
</ges:Login>
</soapenv:Body>
</soapenv:Envelope>','',array(),'document', 'literal');
$RESULT = $client->send($mysoapmsg, $soapaction);
$Resultado = $RESULT['LoginResult'];
Espero les haya servido.
Saludos