PHP - Web service y xml

<?php

error_reporting(E_ALL);

ini_set('display_errors', 1);

require("sql-filtre.php");

$email = "loquesea@hotmail.com";

$movil = "333333333";

$dinero = 1500;

$Codigo_Comercio = '1111111111';

$Order_Id = '151';

$url = 'https://sis-i.redsys.es:25443/sis/services/SerClsWSEntrada';

$Clave_Comercio = 'qweryasdf0123456789';

//Funcion que hace el curl 

function download_page($url,$xml){

$url = 'https://sis-i.redsys.es:25443/sis/services/SerClsWSEntrada';

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_POST, 1);

curl_setopt($ch, CURLOPT_POSTFIELDS, "entrada=$xml");

curl_setopt($ch, CURLOPT_FAILONERROR,1);

curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);

curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);

curl_setopt($ch, CURLOPT_TIMEOUT, 15);

$result = curl_exec($ch);

curl_close($ch);

return $result;

}

//End funcion que hace el curl 

//... 

$firma_comercio = sha1($dinero.$Order_Id.$Codigo_Comercio.'978'.$url .$movil.$email.$Order_Id.$Clave_Comercio);

$xml = "<?xml version='1.0' encoding='UTF-8'?>";

$xml .= "<DATOSENTRADA>";

$xml .= "<DS_MERCHANT_AMOUNT>$dinero</DS_MERCHANT_AMOUNT>";

$xml .= "<DS_MERCHANT_ORDER>$Order_Id</DS_MERCHANT_ORDER>";

$xml .= "<DS_MERCHANT_MERCHANTCODE>$Codigo_Comercio</DS_MERCHANT_MERCHANTCODE>";

$xml .= "<DS_MERCHANT_CURRENCY>978</DS_MERCHANT_CURRENCY>";

$xml .= "<DS_MERCHANT_MERCHANTURL>$url</DS_MERCHANT_MERCHANTURL>";

$xml .= "<DS_MERCHANT_TERMINAL>001</DS_MERCHANT_TERMINAL>";

$xml .= "<DS_MERCHANT_MOBILE>$movil</DS_MERCHANT_MOBILE>";

$xml .= "<DS_MERCHANT_MAIL>$email</DS_MERCHANT_MAIL>";

$xml .= "<DS_MERCHANT_TRANSACTIONTYPE>F</DS_MERCHANT_TRANSACTIONTYPE>";

$xml .= "<DS_MERCHANT_MERCHANTSIGNATURE>$firma_comerci o</DS_MERCHANT_MERCHANTSIGNATURE>";

$xml .= "</DATOSENTRADA>";

echo $xml;

$url = 'https://sis-i.redsys.es:25443/sis/services/SerClsWSEntrada';

$sXML = download_page($url,$xml);

$oXML = new SimpleXMLElement($sXML);

//The service response code 

echo '<br><xmp>'.$sXML.'</xmp>';

$arryaOxml = get_object_vars($oXML);

$codigo = $arryaOxml['CODIGO'];

if(isset($arrayOperacion['Ds_Response']))

$respuesta = $arrayOperacion['Ds_Response'];

if(isset($arrayOperacion['Ds_Response']) && (int)$codigo == 0 && (int)$respuesta == 0 ){

$string_to_save = 'Operacion exitosa.';

$status = 1;

}elseif(isset($arrayOperacion['Ds_Response']) && (int)$respuesta == 190){

$string_to_save = 'Operacion denegada por el banco.';

$status = 0;

}else{

$string_to_save = 'Error en la operacion: '.$codigo;

$status = 0;

}

?>