Codeigniter - cache - server?

Question

After a couple of years with no cache problems in Codeigniter, I discovered one. I have see the problem described other places, but with no solution that works for me.

If I for example change some plain html text in a view and upload a new file and press F5 the old cached file is shown. If I afterwards press ctrlF5 the new is shown, and F5 again gives me back the old cached file. I have tried to flush the browser cache manually, but we no effect. After a couple of minutes the old cached file gets replaced with the new one. This issue gives me problems with login and logout.

I have without luck placed the following code in both the login and logout controller;

$this->output->cache(0);            
$this->output->set_header('Last-Modified: ' . gmdate("D, d M Y H:i:s") . ' GMT');
$this->output->set_header('Cache-Control: no-store, no-cache, max-age=0, must-revalidate, post-check=0, pre-check=0');
$this->output->set_header('Pragma: no-cache');
$this->output->set_header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

I have not activated output cache in any controller ($this->output->cache(n)) or have a cache folder (application/cache or system/cache/(beore 2.0.0)) or use db cache (['cache_on'] = FALSE) in the config file.

I am using: Codeigniter 2.0.0 Firefox 21.0

I think that the cache files are stored somewhere on the Linux server, but where and how to flush, I don't know.

Any help or pointing in the right direction will be fine. Thx!

Best regards Martin

Answer 1

Cache files are not deleted before they expire. Cache files are saved in application/cache folder. you can manually delete it from there.

Additionally, you can better manage your cache(programatically), by either adding cache helper or extending your output class with clear page cache