header not redirecting - php

Question

This file is supposed to redirect to the URl specified in the header but displays blank page.
It displays expected values if you un-comment some of the results.
<?php
sendReceiveOrder($Amnt);
function sendReceiveOrder($Amnt) {
//$ch = curl_init ();
$description = $_POST['gtpay_tranx_memo'];
$receivedXML = "";
$receivedXML .= "<?xml version='1.0' encoding='UTF-8'?>";
$receivedXML .= "<TKKPG>";
$receivedXML .= "<Request>";
$receivedXML .= "</Request>";
$receivedXML .= "</TKKPG>";
// Define POST URL and also payload
//
define ( 'XML_POST_URL', 'http://127.0.0.1:5555/Exec' );
// Initialize handle and set options
$ch = curl_init ();
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch,CURLOPT_MAXREDIRS,50);
if(substr($url,0,8)=='https://'){
// The following ensures SSL always works. A little detail:
// SSL does two things at once:
// 1. it encrypts communication
// 2. it ensures the target party is who it claims to be.
// In short, if the following code is allowed, CURL won't check if the
// certificate is known and valid, however, it still encrypts communication.
curl_setopt($ch,CURLOPT_HTTPAUTH,CURLAUTH_ANY);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
}
curl_setopt ( $ch, CURLOPT_URL, XML_POST_URL );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_TIMEOUT, 500 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $receivedXML );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, array ('Connection: close' ) );
//---Additional stuff
curl_setopt($ch, CURLOPT_CAINFO, getcwd() . "/tdpayment/cert/ETECHNOL.pem");
//----------
/**
* Execute the request and also time the transaction
*/
$start = array_sum ( explode ( ' ', microtime () ) );
$result = curl_exec ( $ch );
$stop = array_sum ( explode ( ' ', microtime () ) );
$totalTime = $stop - $start;
/**
* Check for errors
*/
if (curl_errno ( $ch )) {
$result = 'cURL ERROR -> ' . curl_errno ( $ch ) . ': ' . curl_error ( $ch );
} else {
$returnCode = ( int ) curl_getinfo ( $ch, CURLINFO_HTTP_CODE );
switch ($returnCode) {
case 200 :
break;
default :
$result = 'HTTP ERROR -> ' . $returnCode;
break;
}
}
/**
* Close the handle
*/
curl_close ( $ch );
/**
* Output the results and time
*/
//echo 'Total time for request: ' . $totalTime . "\n";
//echo $_SESSION ['Amt'];
//echo $result ;
//echo "<br>";
$_SESSION['store_result'] = $result;
//echo $Amnt;
//echo $description;
//return $result;
/**
* Exit the script
*/
$result2 = <<<XML
<?xml version='1.0' standalone='yes'?>
$result
XML;
$TKKPG = new SimpleXMLElement($result2);
$orderid = $TKKPG->Response->{'Order'}->OrderID;
$sessionid = $TKKPG->Response->{'Order'}->SessionID;
$url = $TKKPG->Response->{'Order'}->URL;
$_SESSION['ordersessionid'] = $orderid.$sessionid;
$header = $url."?sessionid=".$sessionid."&orderid=".$orderid;
header ("Location: ".$header);
exit ( 0 );
}
?>