RestClient::set_option PHP Method

    public function set_option($key, $value)
    {
        $this->options[$key] = $value;
    }

function registerRest($name, $address, $phone, $email, $username, $password, $confirm)
{
    echo "abc";
    $api = new RestClient(array('base_url' => "http://146.193.41.50:8080/trace"));
    $api->set_option('user_agent', "application/json");
    $api->set_option('format', "json");
    $result = $api->post("tracker/register", array('name' => $name, 'username' => $username, 'email' => $email, 'password' => $password, 'confirm' => phone, 'phone' => $phone, 'address' => $address));
    $loginSuccessful = json_decode($result->response)->success;
    //	var_dump($loginSuccessful);
    var_dump($result->response);
    //
    //	return $loginSuccessful;
}