Dynamics NAV 2016 Web Service: Parameter * in method * in service * is null - php

Question

I try to get a single contact from my Dynamics Nav Web Service (Dynamics Nav 2016). I do this with a SOAP-request in PHP.
The web service is a codeunit which contains two functions:
fGetContact(iContactNumber : Text[20]) oContact : Text[250]
IF rContact.GET(iContactNumber) THEN BEGIN
oContact := '';
oContact := rContact."No." + ';' +
rContact."Company Name" + ';' +
rContact."First Name" + ';' +
rContact.Surname + ';' +
rContact."E-Mail";
END;
EXIT(oContact);
fGetContacts() oContacts : Text[250]
IF rContact.GET('KT100190') THEN BEGIN
oContacts := '';
oContacts := rContact."No." + ';' +
rContact."Company Name" + ';' +
rContact."First Name" + ';' +
rContact.Surname + ';' +
rContact."E-Mail";
END;
EXIT(oContacts);
The second function, fGetContacts, works fine.
But when I call fGetContact with a contact number as parameter, it returns the following error:
Parameter iContactNumber in method FGetContact in service MyService is null!
I use the NTLMSoapClient like the following:
<?php
ini_set('soap.wsdl_cache_enabled', '0');
require_once 'ntlmstream.php';
require_once 'ntlmsoapclient.php';
$url = 'http://localhost:7047/DynamicsNAV90/WS/CRONUS/Codeunit/MyService';
$options = array(
'uri' => $url,
'location' => $url,
'trace' => true,
'login' => 'my_user',
'password' => 'my_password'
);
// we unregister the current HTTP wrapper
stream_wrapper_unregister('http');
// we register the new HTTP wrapper
stream_wrapper_register('http', 'MyServiceProviderNTLMStream') or die("Failed to register protocol");
// so now all request to a http page will be done by MyServiceProviderNTLMStream.
// ok now, let's request the wsdl file
// if everything works fine, you should see the content of the wsdl file
$client = new MyServiceNTLMSoapClient(null, $options);
// should display your reply
try {
$params = array('iContactNumber' => 'KT100190');
echo '<pre>';
echo $client->FGetContacts(); // works
echo $client->FGetContact($params); // doesn't work
echo '</pre>';
} catch (SoapFault $e) {
echo '<pre>';
var_dump($e);
echo '</pre>';
}
// restore the original http protocole
stream_wrapper_restore('http');
I also tried to call the function like this:
echo $client->FGetContact('KT100190');
The return error is the same as before.
I tested my function with SoapUI and the return value is exactly what it shuold be.
Request:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:new="urn:microsoft-dynamics-schemas/codeunit/MyService">
<soapenv:Header/>
<soapenv:Body>
<new:FGetContact>
<new:iContactNumber>KT100190</new:iContactNumber>
</new:FGetContact>
</soapenv:Body>
</soapenv:Envelope>
Response:
<Soap:Envelope xmlns:Soap="http://schemas.xmlsoap.org/soap/envelope/">
<Soap:Body>
<FGetContact_Result xmlns="urn:microsoft-dynamics-schemas/codeunit/MyService">
<return_value>KT100190;Add-ON Marketing;Chris;McGurk;chris.mcgurk#cronuscorp.net</return_value>
</FGetContact_Result>
</Soap:Body>
</Soap:Envelope>
So what am I doing wrong that this error appears and how can I fix it?

Answer 1

For what it's worth, I had this issue and solved it by adding "cache_wsdl" => WSDL_CACHE_NONE to the soap client's options.
Some fields were missing because of a cache issue after updating the WSDL.

Answer 2

I made a workaround and it works for me now.
I changed the $request variable in the class NTLMSoapClient, because the soap envelope that php sent to my service was absolutely useless.
So basically I just did this before the curl actions:
$request = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:new="urn:microsoft-dynamics-schemas/codeunit/MyService">
<soapenv:Header/>
<soapenv:Body>
<new:FGetContact>
<new:iContactNumber>'.$this->iContactNumber.'</new:iContactNumber>
</new:FGetContact>
</soapenv:Body>
</soapenv:Envelope>';
(If someone have the same problem, try var_dump($request) and view source in browser. You will see what a mess PHP did there...)