public function config($config = null)
    {
        if ($this->_config) {
            return $this->_config;
        }
        $this->_config = $config;
        return $this->_config;
    }
public function config($config = null)
    {
        if ($this->_config) {
            return $this->_config;
        }
        $this->_config = $config;
        return $this->_config;
    }
public function config ( $ config = null ) { if ( $ this -> _config ) { return $ this -> _config ; } $ this -> _config = $ config ; return $ this -> _config ; }
Gets and Sets our configuration array for our connection class.

@param null $config
@return null
Gets and Sets our configuration array for our connection class .