Posted by Bret Hughes on 02/24/05 16:19

On Thu, 2005-02-24 at 04:02, Jacques wrote:
> How can I ensure that a user is prevented from creating a second profile
> after he has registered a second time with different registration details?
>
> I thought of capturing his IP Address and checking this value against my
> users table in my database where I have captured IP Addresses of users who
> have previously registered.
>

Not a good way for several reasons:

Dynamic IP addresing:
NAT based firewalls.

I suspect your best bet is to place a cookie.

Bret

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