[kh99]

Hmm...well, I guess I'd do a query to get all the records from the open_close table ordered by threadid, and probably join it with the thread table to get the open field. Then for each threadid, find the record with the day of week and time that is closest to the current time, but before the current time (if there aren't any before the current time, then use the last one). Then make sure the thread open state is the same as that record calls for. But I don't have time to work out the details.

I guess if you're allowing down to the minute then you need a cron job scheduled to run every minute.