Refresh data in the webpage

[Anon]

Dear all,

After I update the data in the php webpage, I open other webpage to show whether the data have been update or not. However, the data have not been update yet. Anyway, if I refresh the webpage again using the internet explorer's menu, the data have in fact been update already. I think that, the old webpage browsed previously in my computer is now downloaded instead of from the website if without refresh from IE menu. Is it related to the RAM or cache in the computer? Please give me method on how to open the update webpage with refresh, thanks.

Sincerely yours,
Simon

[fleymingmasc]

This has to do with the browser's cache. Put the following at the top of your script to force a refresh. This must appear before any text gets sent to the browser:

header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");

This will work with most browsers (a few apparently ignore these headers).

Another tack: if you have access to your php.ini file, find the setting for session.cache_limiter and set it to the following:

session.cache_limiter = ;

Setting it to 'blank' (no value) gives control of the cache to the browser instead of the web server; the browser will generally choose to request the page each time instead of drawing it from the cache.