stop inserting data in the database when refreshing the page

Question

I am looking for a way to stop inserting or sending data in the database when refreshing the page.

here is my code:

user_details_page.php

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Answer 1

Once an insert or update is done in your code you always need to redirect to another page.

See here on how to do that: How to make a redirect in PHP?

(You want to use a PHP redirect, not a Javascript or HTML one, because you obviously really need this to work.)

The confirm page should be what you redirect to after the update, not what does the insert.