public function getServerValue($key)
    {
        if (isset($this->server[$key])) {
            return $this->server[$key];
        }

        return null;
    }
public function getServerValue($key)
    {
        if (isset($this->server[$key])) {
            return $this->server[$key];
        }

        return null;
    }
public function getServerValue ( $ key ) { if ( isset ( $ this -> server [ $ key ] ) ) { return $ this -> server [ $ key ] ; } return null ; }
@param $key

@return mixed|null
@param $key