PHP SOAP Request with Authentication

[JasonHarper]

I'm trying to use the code below to make a SOAP request to a vendor's web service:

$client = new SoapClient('http://my.domain.com/wsdl/GuestService.WSDL', array('connection_timeout' => 15, 'trace' => 1));

$ns = 'http://vendor.domain.com/';


$headerbody = array('brand' => 'BRAND1', 

'locale' => 'en_us', 

'securityCredentials'=>array('applicationId'=>'ABCDEF', 'token'=>'123456789123456789123456789'));


$header = new SoapHeader($ns, 'Header', $headerbody);


$client->__setSoapHeaders($header);


$result = $client->getGuest(array('guestID' => '000787'));

However, I'm getting an error back that no credentials were supplied so I must be doing something wrong. Error message: Uncaught SoapFault exception: [soapenv:NO_CREDENTIALS]

I reached out to the vendor and they sent me an XML sample of how they're expecting to receive the data:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:prox="http://vendor.domain.com" xmlns:gues="http://vendor.domain.com/guest">

<soapenv:Header>

<prox:brand>BRAND1</prox:brand>

<prox:locale>en_us</prox:locale>

<prox:securityCredentials>

<prox:applicationId>ABCDEF</prox:applicationId>

<prox:token> 123456789123456789123456789</prox:token>

</prox:securityCredentials>

</soapenv:Header>

<soapenv:Body>

<gues:getGuest>

<guestID>000787</guestID>

</gues:getGuest>

</soapenv:Body>

</soapenv:Envelope>

I thought I had accounted for everything in the above but maybe I'm missing something obvious. Really appreciate any help!

[JasonHarper]

UPDATE: I downloaded SoapUI so I could see what's going on. It turns out the XML being generated is almost correct with one small issue....the header is inserting <item> and <key> tags within the XML:

<securityCredentials>

<item>

<key>applicationId</key>

<value>ABCDEF</key>

</item>

</securityCredentials>

What I need is:

<securityCredentials>

<applicationId>ABCDEF</applicationId>

<token>123456</token>

</securityCredentials>

If I could eliminate the tags, the XML would be correct. I've researched and can't seem to find a specific flag or setting so still stuck on what to do next.