Shoutbox

I tried both methods and came up with some conclusion:

code:

---

if( $_POST['ok_btn'] == '1' )
    header( 'refresh: 0; url=http://www.example.net' );

---

I need to click the button twice to get "the refresh effect."
Can you explain this to me?

code:

---

if( $_POST['ok_btn'] == '1' )
    header("Location: page.php");

---

This has the closest result I want.

However, both methods don't really do "refresh" instead they redirect users to the URL in the link.
So, I click "Back" button on my browser, it goes to the page before the change was made.

I hope you understand what I mean
Thanks again.