Hi
hmm? (1.)
the form sends the data to this file (2.)
as you can see the data in the img
then index.php, which is not populated with data, is called (3.)
so there is something in your code that does not pull data (refresh state) or does not save it at all
otherwise the change works OK as long as you have it initially filled in by you
but when I have deleted everything then what I have already stated happens
it would help a lot more to copy / paste PHP codes here
(of course hide any sensitive information)
you should definitely work on security as well
because everything stated here also applies to you
(so read most of the topic)