Question on refresh

Here is a problem I have come across a few times and wonder if there is a
simple solution.

On my form I have a submit button called, say, addEntry. I do a test for it
as

if (isset($_POST[addEntry'])) { code to insert stuff into the database }

The problem is that after clicking the button, and the code returns it to
the same screen, if the user clicks the refresh button on the browser it
will add another entry. Is there a simple way to unset an html field test?
I know that unset can be unset a variable in php, but this is testing an
action on the form.

--
Shelly

On Tue, 21 Aug 2007 16:11:35 +0200, Shelly
<sheldonlg.news@asap-consult.comwrote:
One of the most common ways to achieve this is to do the thing on a post,
without any output (unless possibly when there are errors), and then do a
header redirect to a page (the same or another, whichever is more
appropriate). POST values will be lost on a redirect, so this snippet will
not 're-enter' the information:

<?php
if(isset($_POST['submit'])){
//do your thing here
header('Location: http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
exit;
}
//displaying of page here
?>
--
Rik Wasmus

"Rik" <luiheidsgoeroe@hotmail.comwrote in message
news:op.txexy4dsqnv3q9@metallium...Wow! It is as simple as that? Simply redirect the page to itself after the
insertion into the database? Thanks.

Shelly

On Aug 21, 10:17 am, Rik <luiheidsgoe...@hotmail.comwrote:It's also worth noting that this question has been asked so many times
that it shouldn't be too difficult to find some resources on it.

..oO(Shelly)
After processing the form, send a Location header (with absolute URL)
back to the browser to redirect him to the same page. Now when a user
hits refresh, the browser will just send a normal GET request, not a
POST again.

http://www.php.net/header

Micha