Soap Request PHP

<?php
$wsdl = "http://irusalserver.dns-dns.com/eComerce/Servicio.asmx?wsdl";$wsdl = "http://irusalserver.dns-dns.com/eComerce/Servicio.asmx?wsdl";
        $client = new SoapClient($wsdl,
            array(
                'trace' => 1,
                "cache_wsdl" => 0,
                "soap_version"  => SOAP_1_1
            )
        );

        $encabezado = array();
        $encabezado[] = new SoapVar("2019-08-27T12:20:00",XSD_DATETIME,'datetime','http://www.w3.org/2001/XMLSchema','FechaEntrega');
        $encabezado[] = new SoapVar(0,XSD_DECIMAL,'decimal','http://www.w3.org/2001/XMLSchema','Amex');
        $encabezado[] = new SoapVar(899, XSD_DECIMAL, 'decimal', 'http://www.w3.org/2001/XMLSchema', 'Tarjeta' );
        $BigEncabezado = new SoapVar($encabezado,SOAP_ENC_OBJECT,null,null,'Encabezado');

        $cuerpo=array();
        $cuerpo[]=new SoapVar("013059",XSD_STRING,'string','http://www.w3.org/2001/XMLSchema','Producto_Id');
        $cuerpo[]=new SoapVar(1,XSD_DECIMAL,'decimal','http://www.w3.org/2001/XMLSchema','Cantidad');
        $cuerpo[]=new SoapVar(899,XSD_DECIMAL,'decimal','http://www.w3.org/2001/XMLSchema','Precio');
        $BigCuerpo=new SoapVar($cuerpo,SOAP_ENC_OBJECT,null,null,'Cuerpo');

        /*$FF = array(
            'VentaDT' => array($BigEncabezado,$BigCuerpo)
        );*/

        $FF = array($BigEncabezado,$BigCuerpo);

        $FlexFields = new SoapVar($FF,SOAP_ENC_OBJECT,null,null,'venta');
        $resp = $client->GenerarVenta(
            array('venta'=>$FlexFields)
        );
        pr($resp);

?>