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

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

        return null;
    }
public function get ( $ key ) { if ( isset ( $ this -> settings [ $ key ] ) ) { return $ this -> settings [ $ key ] ; } return null ; }
Get configuration parameter by key if exists else return null

@return mixed
Get configuration parameter by key if exists else return null