Auto Update DB Question

[rradu]

HI

i'm new to this forum and a newbie in webdevelopment so, if my question is in wrong section mods, please move it!

my problem sounds like this:
a user send some data to server (trough php) actually a date & hour, at the respective hour i want some data in my DB to be updated (changed) even if user leaves the page (the date & hour may be 3 days ahead so he can't keep the browser open 3 days).
my question is: how can i do those changes. what program(preferably free)/language/technology should i use to make those changes.
as far as i know i can't do this with php.

ps: i know html, js, css, php.
pss: i use xampp.

THX!

[rradu]

please, nobody knows how to do this?