protected function setToCache($key, $value = null)
    {
        if (!isset($value)) {
            unset($this->_cache[$value]);
            return;
        }
        $this->_cache[$key] = $value;
    }
protected function setToCache($key, $value = null)
    {
        if (!isset($value)) {
            unset($this->_cache[$value]);
            return;
        }
        $this->_cache[$key] = $value;
    }
protected function setToCache ( $ key , $ value = null ) { if ( ! isset ( $ value ) ) { unset ( $ this -> _cache [ $ value ] ) ; return ; } $ this -> _cache [ $ key ] = $ value ; }
Set data to cache
@param string $key
@param mixed|null $value
Set data to cache