it seems to me that is does not return the SOAP headers as it states in the explanation, but the request headers....
(PHP 5 >= 5.0.1, PHP 7)
SoapClient::__getLastRequestHeaders — Returns the SOAP headers from the last request
Returns the SOAP headers from the last request.
Note:
This function only works if the SoapClient object was created with the trace option set to
TRUE.
This function has no parameters.
The last SOAP request headers.
Example #1 SoapClient::__getLastRequest() example
<?php
$client = SoapClient("some.wsdl", array('trace' => 1));
$result = $client->SomeFunction();
echo "REQUEST HEADERS:\n" . $client->__getLastRequestHeaders() . "\n";
?>
it seems to me that is does not return the SOAP headers as it states in the explanation, but the request headers....