php - Back button giving error message on login page -


so made login page our users manage accounts, , once logged in takes them user control panel type page. once they're on page can see other pages available them. if click on page 2 example, , press button(which bring them user control panel) error message saying:

firefox - document expired document no longer available. chrome - confirm form resubmission

ie - document expired

if go page 2 , page 2 page 3 , hit button, bring them page 2 without issue. hope makes sense, , thank in advance.


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