Can anyone help I need to run a php file or function on a specific time (atmost predifined). So i can not find any way to do this , i think about server variable. This has to be done without browser i mean there is no chance that browser run at that time it may be or may not. I hope you understand the problem pls give solution Thanks.
You need to use cron (on *nix) or scheduled tasks (windows)
http://en.wikipedia.org/wiki/Cron
Most web host software (such as cPanel) allows you to edit the crontab (the list of scheduled tasks) via the web interface
they are called cron jobs