The implementation itself is quite trivial, requiring only one (or two) integer counter(s) in both the user and the post/reply record.
… except if you want to exclude duplicate votes. Try this link (will work only for logged-in users, and you should replace the number with the ID of your user page)

In reply to Re^2: RFC: Emulating the monastery voting system by soonix
in thread RFC: Emulating the monastery voting system by biohisham

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