How to consume a php webservice in Unity ?

Hi,

I'm actually maling a sample to test the web service consumption into Unity. In my localhost I've created a little php webservice : index.php :

     class Donne
     {
       function donne($i)
       {
         return $i;
       }
       function hello()
       {
         return "hello world";
       }
 
       function add($a, $b)
       {
           $c = $a + $b;
           return $c;
       }
     }
 
     try
     {
       $server = new SoapServer(null, array('uri' => 'http://127.0.0.1/webservices/index.php'));
 
       $server->setClass("Donne");
       $server->handle();
     }
     catch(Exception $e)
     {
       echo "Exception: " . $e;
     }
 ?>

And I created an other page to use it : test.php

 <?php
 try
 {
   $clientSOAP = new SoapClient( null,
     array (
       'uri' => 'http://127.0.0.1/webservices/index.php',
       'location' => 'http://127.0.0.1/webservices/index.php',
       'trace' => 1,
       'exceptions' => 0
   ));
 
   $ret = $clientSOAP->__call('hello', array());
   echo $ret;
 
   echo '<br />';
 
   if (isset($_GET['a']) && isset($_GET['b']))
   {
       $ret = $clientSOAP->__call('add', array('a'=>$_GET['a'], 'b'=>$_GET['b']));
       echo $ret;
   }
   else
   {
       echo 'no';
   }
 }
 catch(SoapFault $f)
 {
   echo $f;
 }
 ?>

When I acces if from the following URL : (http://127.0.0.1/webservices/test.php?a=5&b=8), I've got the correct answer : Hello World
13

But when I try to access it from the Unity execution :

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class WebService : MonoBehaviour {
 
     public GameObject text;
     public string url = "http://127.0.0.1/webservices/test.php";
 
     private WWWForm wwwForm;
     private Text m_text;
 
     // Use this for initialization
     IEnumerator Start () {
         wwwForm = new WWWForm ();
         wwwForm.AddField ("a", 5);
         wwwForm.AddField ("b", 8);
 
         m_text = text.GetComponent<Text> ();
         WWW www = new WWW(url, wwwForm);
         yield return www;
         m_text.text = www.text;
 
     }
 }

I've got "Hello World
no". I've read that all WWWForms are GET by default but the $_GET in php is not valid.

What did I miss ?

Thx for the help.