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From: Ashley Sheridan on 17 Jun 2010 11:09
On Thu, 2010-06-17 at 12:07 -0300, Juan Rodriguez Monti wrote:

>
>
>
> 2010/6/16 Ashley Sheridan <ash(a)ashleysheridan.co.uk>
>
>
> On Wed, 2010-06-16 at 20:36 +0200, David Cesal wrote:
>
> > Please, don't forget IP address can be same for many users. I see only way with cookies. When user deletes cookies, form pops up again. I don't know any better way.
> >
> > David
> >
> > Sent from my HTC
> >
> > -----Original Message-----
> > From: Juan Rodriguez Monti <juan(a)rodriguezmonti.com.ar>
> > Sent: 16. cervna 2010 20:26
> > To: php-general(a)lists.php.net
> > Subject: [PHP] User's IP Validation
> >
> > Hi people,
> > I would like to know the best way to perform some kind of validation
> > for an application that I've written.
> >
> > I have a system that ask through an HTML Form some questions to users.
> > I use some cookies to save some information from the user side.
> >
> > However, I would like to implement some code in PHP that would let me
> > limit to 1 the number of times that the page with the questions was
> > executed.
> >
> > I mean, the user fills the HTML's Form, then send it through an HTML
> > Button, then PHP receives this informations and send an Email
> > containing the replies to the questions. I would like to limit to one,
> > the times one single user is able to execute this form.
> >
> > I thought getting the IP Address, then doing some kind of validation
> > with it. However I don't know if using cookies is the best idea. I
> > don't have access to a DataBase for this. So I thought might be a good
> > idea write to a file in the server the IP, then perform some if to
> > know if the user already replied the form.
> >
> > As far as I don't know which is the best way to code this, I felt free
> > to ask you guys.
> >
> > Thanks a lot.
> >
> > Juan
> >
> > --
> > PHP General Mailing List (http://www.php.net/)
> > To unsubscribe, visit: http://www.php.net/unsub.php
> >
> >
> >
> >
>
>
>
>
> Like others have said, unless you have specific user logins,
> there's no way to prevent people from viewing the form more
> than once. As you are emailing them the answers, I assume
> there is some form of login system being used, so you could
> use that, with some sort of flag to indicate the email has
> been sent. If you want to future-proof the system, you could
> use some sort of binary bit flag to indicate what forms
> they've been sent answers to, for example:
>
> 0 - no answers have been sent
> 1 - only the first set of answers
> 4 - the 3rd set of answers only
> 5 - the 3rd and 1st set of answers
>
>
> Yes, tha't s true. However I'm not using a DB for this little job.
>
> There's no login system. There's a little script that runs the form,
> and then send an email to some directions, but not for the user's
> Email address.
>
> I thought I should use cookies, however is far from secure.
>
> Thanks a lot people!.
>
> Juan
>
>
>

What email address are you sending the instructions to then? I had
assumed it was to the person who filled in the form?

Thanks,
Ash
http://www.ashleysheridan.co.uk


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