CRSF

When $config['csrf_protection'] = TRUE,
if I search the site via a search form, click on a search result and then clicks on the browser back button,
the browser says: "Webpage has expired"

$config['csrf_regenerate'] = FALSE !

if I set $config['csrf_protection'] to TRUE it solves the problem, but obviously this is not a good idea...

how did you create the form? with form_open()?

Website: http://avenir.ro

how solve it still show on page view source.....

how did you create the form? with form_open()?

Yes

Set csrf_regenerate to false otherwise the token stored in your page will be invalid when they click back. http://security.stackexchange.com/questi...rm-request see first reply.