记CI2.0购物车类的3个坑

//log_message('error', 'An invalid name was submitted as the product name: '.$items['name'].' The name can only contain alpha-numeric characters, dashes, underscores, colons, and spaces');
//return FALSE;

if ($this->_cart_contents[$items['rowid']]['qty'] == $items['qty'])
{
    //return FALSE;
}

$this->_cart_contents[$items['rowid']]['qty'] = $items['qty'];
$this->_cart_contents[$items['rowid']]['options'] = $items['options'];//here new?