php load/refresh question

[mikedaruke]

I have a php page that reads content from a CSV file and comes up with all these caluations, etc.

The CSV file is updated like every 30 mintues.

When I got to the php page, I get stale data unless I hit refresh. People of course forget to refresh then come calling why is the data wrong.

How can I force the browser to refresh the page once they go to it? So I dont ever want to use a cached version.

I am not looking to have it refresh by itself every 5 seconds. I only want it to refresh when its called. It has to come from the server not the browser.

 

[jpadie]

set the no-cache and content-expire headers.

 

[mikedaruke]

how?

 

[jpadie]

that's more an http question.

in php you set http headers using the header() function.

header("Cache-Control: no-cache, must-revalidate");
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");