confirmacion.php

<?php

include 'config.php';

$referenceCode = $_REQUEST['reference_sale'];
$txtValue = $_REQUEST['value'];
$newValue = number_format($txtValue, 1, '.', '');
$currency = $_REQUEST['currency'];
$statePol = $_REQUEST['state_pol'];
$sign = $_REQUEST['sign'];
$estadoTxt = 'Firma no concuerda';

$firma = "$ApiKey~$merchantId~$referenceCode~$newValue~$currency~$statePol";
$firmaMd5 = md5($firma);


// Si la firma concuerda
if ($firmaMd5 === $sign) {

    switch ($statePol) {
        case 4:
            $estadoTxt = "Transacción aprobada";
            break;
        case 6:
            $estadoTxt = "Transacción rechazada";
            break;
        case 7:
            $estadoTxt = "Transacción pendiente";
            break;
        case 104:
            $estadoTxt = "Error";
            break;
        default:
            $estadoTxt = $_REQUEST['mensaje'];
    }


}

$msg = "<b>Estado:</b> $estadoTxt <br>";
$msg .= "<b>Apikey:</b>$ApiKey - <b>merchantId:</b>$merchantId - <b>referenceCode:</b>$referenceCode - <b>newValue:</b>$newValue - <b>currency:</b>$currency - <b>statePol:</b>$statePol";
$msg .= "<b>Firma MD5:</b> $firmaMd5 <br>";
$msg .= "<br><hr><br><b>REQUEST EN JSON<br>";
$msg .= json_encode($_REQUEST);

$headers = 'MIME-Version: 1.0' . "\r\n"; // set mime version
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n"; // set content-type as html

//mail($confirmacionEmail, 'Formulario página web', $msg, $headers);