Possible Duplicate:
PHP: running scheduled jobs (cron jobs)
I need to update a database every 20 mins lets say. (ie. add 50 to 'X' column, subtract 20 form 'y' column, preform an equation based on time on 'z' column, etc.) I have the necessary update in a update.php page but how would i go about calling that page every 20 minutes (short of scheduling a task on a computer)? or is there a better way to do this?
Thanks