How to get specific value from SimpleXMLElement object?

Question

PHP

Good afternoon or evening, I have bank-acquiring on servlets here (yes-yes), this is the answer to my request . I need to get OrderID, SessionID from the response to generate a link to redirect the buyer. But my variables are empty.

I will be glad for any hints. Thanks in advance for your responses!
Response format:

Response to sent xml:

Here is the code for sending the request:

<?
$xml= 'Тут Xml';
$url = 'https://epaypost.fortebank.com/Exec';
$curl = curl_init($url);
$url = 'https://epaypost.fortebank.com/Exec';
$curl = curl_init($url);


curl_setopt ($curl, CURLOPT_HTTPHEADER, array("Content-Type: text/xml"));

curl_setopt($curl, CURLOPT_POST, true);

curl_setopt($curl, CURLOPT_POSTFIELDS, $xml);

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

$result = curl_exec($curl);

if(curl_errno($curl)){
    throw new Exception(curl_error($curl));
}

curl_close($curl);

//Print out the response output.
$res = simplexml_load_string($result);

//print_r($res);
//Тут мои попытки получить нужное,но переменные пустуют.(Первый скрин)
 $orderid = (string)$res->OrderID;
 $sessionid = (string)$res->SessionID;  
 
header('Location: https://epay.fortebank.com/?' . http_build_query(array(
    'OrderID' => $orderid,
    'SessionID' => $sessionid
)));  
?>

Answer 1

var_dump((string)$res->Response->Order->OrderID);
var_dump((string)$res->Response->Order->SessionID);