$username = 'wsdatumpos';
$password = 'w$D4tuM#p0$';
$placa = 'todos';

$soapURL = "http://190.143.101.58:2998/VideoData.asmx?WSDL";

$client = new SoapClient($soapURL,array());




$auth = array(
    'sUser' => $username,
    'sPassw' => $password,
    'sPlate' => $placa,
    'GetLastPosition'=> array(
        'Fecha/Hora Evento' => '',
        'Velocidad' => '',
        'Latitud' => '',
        'Longitud' => '',
        'Sentido' => '',
        'Curso' => '',
        'Informacion de la ubicacion' =>'',
        'Evento' => '',
        'Zona' => '',
        )

      );



/*Header authentication*/
$header = new SoapHeader('http://190.143.101.58:2998/','GetLastPositionResult',$auth,false);
$client->__setSoapHeaders($header);


/* Executing a fuction, for example isAlive method */
 $result = $client->GetLastPosition($auth)->GetLastPositionResult;
 print_r( $result);