SoapHeader::SoapHeader SoapHeader constructor SoapHeaderSoapHeader::SoapHeader stringnamespace stringname mixeddata boolmustUnderstand mixedactor SoapHeader is a special low-level class for passing or returning SOAP headers. It is just a data holder and it does not have any special methods except a constructor. It can be used in the SoapClient::__call method to pass a SOAP header or in a SOAP header handler to return the header in a SOAP response. namespace and name are namespace and name of the SOAP header element. data is a SOAP header's content. It can be a PHP value or SoapVar object. mustUnderstand and actor are values for mustUnderstand and actor attributes of this SOAP Header element. "http://localhost/soap.php", 'uri' => "http://test-uri/")); $client->__call("echoVoid", null, null, new SoapHeader('http://soapinterop.org/echoheader/', 'echoMeStringRequest', 'hello world')); ?> ]]> See also SoapClient::__call, SoapParam::SoapParam, and SoapVar::SoapVar.