/** * $_currentKeyと$_currentValueを取得する * * @param void * @return void */ private function _fetchCurrent() { if ($this->_currentId === false || ($pair = $this->_kvs->findById($this->_currentId)) === null) { $this->_currentKey = $this->_currentValue = null; } else { $this->_currentKey = $pair['key']; $this->_currentValue = $pair['value']; } }