Php versions – PHP SOAP-ERROR: Parsing Schema: element already defined When Connecting to D365 WSDL

I am connecting to dynamics 365. It used to work perfectly, i curl to get the token then i use it as an authorization header along with php soapclient and it works, i connect i create a client and i can call my methods.

All of a sudden it decided not to work, and where it used to connect as SOAP 1.1 now it enforced SOAP 1.2
After changing from SOAP 1.1 to SOAP 1.2 ( because I got the error of binding mismatch where it said expecting application/soap+xml and text/xml was found ) So I changed versions and that error disappeared and got replaced with ERROR Fetching HTTP Headers.

That error got stuck for the longest time, people suggested to increase timeout but i put it as high as 500 800 5000 all the same.

Then all of a sudden, it started giving me SOAP ERROR Parsing schema element already defined. I did not change my code, i played for awhile with the headers but to no avail, I even removed the authorization header just to see what is going on and that did nothing i kept getting the same error.

SOAP-ERROR: Parsing Schema: element 'http://schemas.datacontract.org/2004/07/Microsoft.Dynamics.Ax.Xpp:XppObjectBase' already defined [string:Exception:private]

everytime I try to connect I get different kind of parsing schema error even though i am not changing anything in my code:

SOAP-ERROR: Parsing Schema: element 'http://schemas.microsoft.com/2003/10/Serialization/:anyType' already defined [string:Exception:private]

and another

SOAP-ERROR: Parsing Schema: element 'http://schemas.datacontract.org/2004/07/Microsoft.Dynamics.AX.KernelInterop:ProxyBase' already defined [string:Exception:private] 

and then sometimes it does get through for a second but with fetching http header error again..

so i can not create a client instance anymore now..
where before i was able to create a client instance but i get an error when I call the method of “Error Fetching HTTP Headers”

something is definitely not stable because my errors are not one.

now some stated the wsdl could be faulty, but this is microsoft and the person i am in contact keeps saying he can not doing anything about it.

Help is this a PHP problem or a dynamics problem or wsdl custom made problem .

And how to solve this.

Thank you.

UPDATE

I’m sorry I mentioned earlier it is Dynamics AX , it turns out it is Dynamics 365 D365. I will keep dynamics ax tag in case it helps someone who needs the solutions provided.

UPDATE
Following is the connection code I am using:

function getAuthenticationHeader()
{
   //Each variable has the values for our server
   //resource
   $appResource = urlencode($appADResource);
   //clientID
   $appClientID = urlencode($appADClientId);
   //appSecret
   $appSecret = urlencode($appADSecret);
   //username
   $appUserID = urlencode($appUserID);
   // Password
   $appUserPassword = urlencode($password);

   // Construct the body for the STS request
   $authenticationRequestBody =  'resource='.$appResource.'&client_id='.$appClientID.'&client_secret='.$appSecret.'&grant_type=password&username='.$appUserID.'&password='.$appUserPassword.'&scope=openid';

   //Using curl to post the information to STS and get back the authentication response    
   $ch = curl_init();
   // set url 
   $stsUrl = 'https://login.microsoftonline.com/'.$appTenantId.'/oauth2/token';        

   curl_setopt($ch, CURLOPT_URL, $stsUrl); 
   // Get the response back as a string 
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 

   // Set the parameters for the request
   curl_setopt($ch, CURLOPT_POSTFIELDS,  $authenticationRequestBody);

   // By default, HTTPS does not work with curl.
   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
   // read the output from the post request
   $output = curl_exec($ch);         
   // close curl resource to free up system resources
   curl_close($ch);      
   // decode the response from sts using json decoder
   $tokenOutput = json_decode($output);

   return $tokenOutput->{'token_type'}.' '.$tokenOutput->{'access_token'};
}
try
{
    //WSDL Link
    $url = "https://urlToOurServer/services/webservice?wsdl";

    $authorizationToken = getAuthenticationHeader();
    $context = stream_context_create(array(
                'ssl'   => array(
                    'verify_peer'       =>  false, 
                    'verify_peer_name'  =>  false,
                    'allow_self_signed' =>  true
                ),
                'https' => array(
                    'curl_verify_ssl_peer'  => false,
                    'curl_verify_ssl_host'  => false
                    ),              
                'http'  => array(
                    'header'    =>'Authorization: '.$authorizationToken         
                    )
    )); 

    //Create array of Soap Options
    $arrOpt = array(
    "soap_version"      => SOAP_1_2,
    "cache_wsdl"        => WSDL_CACHE_NONE,
    "exceptions"        => true,
    'trace'             => true,
    'encoding'          => 'UTF-8',
    'stream_context'    => $context 
    );
}catch(Exception  $e)
{
    print_r($e);
}

I also found this in my wsdl

<sp:IssuedToken sp:IncludeToken="http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702/IncludeToken/AlwaysToRecipient">
<sp:RequestSecurityTokenTemplate>
<trust:TokenType xmlns:trust="http://docs.oasis-open.org/ws-sx/ws-trust/200512">
http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0
</trust:TokenType>
<trust:KeyType xmlns:trust="http://docs.oasis-open.org/ws-sx/ws-trust/200512">
http://docs.oasis-open.org/ws-sx/ws-trust/200512/Bearer
</trust:KeyType>
</sp:RequestSecurityTokenTemplate>
<wsp:Policy>
<sp:RequireInternalReference/>

How can I connect to SAML for Token ?