php security problem!

intermediate

I am making an online survey, and i want the people that take this survey to only be able to view one of the pages once, meaning they cant refresh, enter the page again, or click their back button to get to it once they get to the page after it. I used a cookie and i logged their ip with mysql and if statements, but for some reason they have to click refresh on the page for it to actually recognize that the ip is in the database or the cookie is on their comp, because they can still click their back button to get to the page and they can access the page from the url, the only way my script works is if they click refresh.

someone help plz!

intermediate

please help

danville

Have you tried have the page auto refresh after loading with a meta tag or something like that.

Char

I'm a little unclear as to what is going on, but I'll try to help anyway. So the user is taking an online survey and they should not be allowed to go back to a page or refresh a page. You're doing this by logging their IP in a database? or by setting a cookie? With regards to this, it would probably be a better idea to log their IP in a database as not everyone will have cookies turned on.

So what should happen when they click their back button? Should it send them back to the page they should be on? Also, how do you have their IP logged in the database, do you have it log their IP each time they visit a page and have it store both the IP and page they are on?

Charlotte Genevier
Webligo Group
http://www.webligo.com