WSDL interpret supossed operation parameters - php

Question

I'm trying to invoque this operation getCountries but I can't figure out reading the WSDL file wich parameters are needed and in which structured way:
http://webservice.nizacars.es/Rentway_WS/getCountries.asmx?WSDL
I've already tried with:
$this->soap_client->getCountries(
array(
'countriesRequest' => array(
'companyCode' => $this->login,
'allCountries' => true
)
)
)
$this->soap_client->getCountries(
array(
'companyCode' => $this->login,
'allCountries' => true
)
)
$this->soap_client->getCountries(
'companyCode' => $this->login,
'allCountries' => true
)
But it seems I'm not matching the specs, since I'm getting a "[Server was unable to process request. ---> Object reference not set to an instance of an object.]"
The final request with SoapClient::__getLastRequest is:
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="http://www.jimpisoft.pt/Rentway_Reservations_WS/getCountries">
<SOAP-ENV:Body>
<ns1:getCountries/>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
Edit, Solution:
$data = array(
'getCountries' => array(
'objRequest' => array(
'companyCode' => $this->login,
'allCountries' => true
)
)
);
$result = #$this->_client->__call('getCountries',$data);

Answer 1

wich parameters are needed and in which structured way:
You can use the soapUI-tool for generating a valid soap-request and response.
I propose to compare your soap-request (by logging it) with the one generated by soapUI:
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:get="http://www.jimpisoft.pt/Rentway_Reservations_WS/getCountries">
<soap:Header/>
<soap:Body>
<get:getCountries>
<!--Optional:-->
<get:objRequest>
<!--Optional:-->
<get:companyCode>?</get:companyCode>
<get:allCountries>?</get:allCountries>
</get:objRequest>
</get:getCountries>
</soap:Body>
</soap:Envelope>