soap request to barclays soap api payments using php curl - php

Question

I have given a task of posting a payment using Barclays SOAP API Payments. After reading the document, they are giving a TEST url for the soap request and also test Credit Card Number. I have used below but it is not doing NOTHING. No response or NOTHING is received at all.
$requestXML = "<?xml version='1.0'?>
<soap:Envelope xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'
xmlns:xsd='http://www.w3.org/2001/XMLSchema'
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
<soap:Body>
<ns1:authorise xmlns:ns1='http://payment.services.adyen.com'>
<ns1:paymentRequest>
<amount xmlns='http://payment.services.adyen.com'>
<currency xmlns='http://common.services.adyen.com'>GBP</currency>
<value xmlns='http://common.services.adyen.com'>67</value>
</amount>
<card xmlns='http://payment.services.adyen.com'>
<cvc304</cvc>
<expiryMonth>03</expiryMonth>
<expiryYear>2019</expiryYear>
<holderName>Owais</holderName>
<number>55554444333331111</number>
</card>
<merchantAccount xmlns='http://payment.services.adyen.com'>owaiskhan772</merchantAccount>
<reference xmlns='http://payment.services.adyen.com'>CPD-1232</reference>
<shopperEmail xmlns='http://payment.services.adyen.com'>owaiskhan772#gmail.com</shopperEmail>
<shopperReference xmlns='http://payment.services.adyen.com'>2843</shopperReference>
</ns1:paymentRequest>
</ns1:authorise>
</soap:Body>
</soap:Envelope>";
$soapUrl = "https://pal-test.barclaycardsmartpay.com/pal/servlet/soap/Payment"; // test url
$soapUser = ""; // username
$soapPassword = ""; // password
$headers = array(
"Content-type: text/xml;charset=\"utf-8\"",
"Accept: text/xml",
"Cache-Control: no-cache",
"Pragma: no-cache",
"SOAPAction: https://pal-test.barclaycardsmartpay.com/pal/servlet/soap/Payment",
"Content-length: ".strlen($requestXML),
); //SOAPAction: your op URL
$url = $soapUrl;
// PHP cURL for https connection with auth
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERPWD, $soapUser.":".$soapPassword); // username and password - declared at the top of the doc
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $requestXML); // the SOAP request
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
// converting
$response = curl_exec($ch);
print_r($response);
curl_close($ch);
I AM NOT GETTING ANYTHING FROM IT. WHAT'S WRONG WITH IT. Thanks