Unset post variables after form submission

Question

Is there a way to do the above? Basically, I don\'t want the form to be submitted again if someone presses refresh after already submitting the form once. In which case the

Answer 1

The problem you are facing above specifically can (and should) be solved with Post/Redirect/Get. Unsetting _POST on the php side would be ineffective since the problem is it is a separate request.

You also have to deal with double-clicking of submission buttons. You can solve this on the client side by disabling form submission after the button click, or by putting a random token in the form and storing that token in the session. The token will be accepted only once (session keeps track of whether the token has been posted).