PHP Curl POST, GET, PUT and DELETE does not work - php

Question

I have Centos 5.5 machine running PHP 5.3. I am trying to do curl POST, GET, PUT and DELETE. None of them are working. I am getting HTTP 401 error.
Actual documentation here:
https://www.igniterealtime.org/projects/openfire/plugins/userservice/readme.html
Here is the POST info:
Header: Authorization: Basic YWRtaW46MTIzNDU=
Header: Content-Type: application/xml
POST http://example.org:9090/plugins/userService/users
Payload Example 1 (required parameters):
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<user>
<username>test3</username>
<password>p4ssword</password>
</user>
Below is the PHP code:
if ($method_name == 'POST')
{
$headers = array(
'Accept: application/xml',
'Authorization: Basic '. $secret,
'Content-Type: application/xml'
);
print_r($headers);
$body= <<<EOD
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<user>
<username>testuser</username>
<password>p4ssword</password>
<name>Test User</name>
<email>test#localhost.de</email>
<properties>
<property key="keyname" value="value1"/>
<property key="anotherkey" value="value2"/>
</properties>
</user>
EOD;
$api_request_url .= '/users';
echo "api_request_url=". $api_request_url. "<BR>";
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($body)); //$body
print_r($body);
//curl_setopt($ch, CURLOPT_POSTFIELDS,http_build_query($api_request_parameters));
}
/*
Here you can set the Response Content Type you prefer to get :
application/json, application/xml, text/html, text/plain, etc
*/
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers );
/*
Let's give the Request Url to Curl
*/
curl_setopt($ch, CURLOPT_URL, $api_request_url);
/*
Yes we want to get the Response Header
(it will be mixed with the response body but we'll separate that after)
*/
curl_setopt($ch, CURLOPT_HEADER, TRUE);
/*
Allows Curl to connect to an API server through HTTPS
*/
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
/*
Let's get the Response !
*/
$api_response = curl_exec($ch);
/*
We need to get Curl infos for the header_size and the http_code
*/
$api_response_info = curl_getinfo($ch);
/*
Don't forget to close Curl
*/
curl_close($ch);
/*
Here we separate the Response Header from the Response Body
*/
$api_response_header = trim(substr($api_response, 0, $api_response_info['header_size']));
$api_response_body = substr($api_response, $api_response_info['header_size']);
// Response HTTP Status Code
echo $api_response_info['http_code']. "<BR>";
// Response Header
echo $api_response_header. "<BR>";