Problem with cakephp validation

I have field in my model whose validation rules is shown below.

        'message' => array(
                'rule' => '/^[a-z0-9#.,&; ]{2,255}$/i',
        'required' => true,
            'allowEmpty' => false,
            'mes开发者_开发知识库sage' => '(message field contains only a-z0-9#.,&; and is between 2 to 255 characters.).'
        ),

This works fine. When I add forwardslash(/) to the rule '/^[a-z0-9#.,&;/ ]{2,255}$/i' or '/^[a-z0-9#.,&;\/ ]{2,255}$/i'. then it does not work.

I appreciate any help.

Thanks.

---

That isn't a backslash, it is a forward slash.
So I don't know which slash you want to use, but one of these should work:

'/^[a-z0-9#.,&;\\ ]{2,255}$/i'

or

'/^[a-z0-9#.,&;\/ ]{2,255}$/i'