$url = 'http://oa.dnc.global/oauth/token.php';
        $options = array(
            'method' => 'POST',
            'datas' =>  array( 
                 'grant_type' => 'authorization_code',
                 'code' => $authcode,
                 'redirect_uri' => 'http://chemindeleau.com/callback_openid.php',
                 'client_id' => 'chemin_openid', 
                 'client_secret' => '01fc458',  
            )        
        );

        $res = recuperer_url($url, $options); 

        $page = json_decode($res['page'], true);

        $token = $page['access_token']; 
        $id_token = $page['id_token'];