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Restricting Voting for user
Hi, I am creating a voting system using php and was wondering if anyone could come up with an idea as to how i could restrict a user from voting multiple times.
So far, all i could think of was to record their ip address and only allow one vote per day from that ip, however if the user votes through an internet cafe etc then it will not allow different users to vote.
Any ideas? I do not want to create accounts for each individual user either.