post v get

When you POST a form to the server the server replies with a new
page. if you click the Back button in the browser the server wants to
re-POST the form. Short of using GET is there a way to prevent
re-submitting the previous form?

--
Regards, Andu Novac

no

Jim Lucas
----- Original Message -----
From: "andu" <php@archeopterix.com>
To: <php-general@lists.php.net>
Sent: Thursday, August 28, 2003 1:49 PM
Subject: [php] post v get


> When you POST a form to the server the server replies with a new
> page. if you click the Back button in the browser the server wants to
> re-POST the form. Short of using GET is there a way to prevent
> re-submitting the previous form?
>
> --
> Regards, Andu Novac
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>

andu wrote:

> When you POST a form to the server the server replies with a new
> page. if you click the Back button in the browser the server wants to
> re-POST the form. Short of using GET is there a way to prevent
> re-submitting the previous form?

Of course. :)

One technique is to use a "middle-man" page that processes your POST
data and inserts it into the database or file or whatever. Then you use
header() to send the user to another page.

So the page that was "posted" to is never really seen by the user and
the back button just goes back directly to the form. You can also go
back to the redirected page without the browser asking to "re-post" the
data...

--
---John Holmes...

Amazon Wishlist: www.amazon.com/o/registry/3BEXC84AB3A5E/

php|architect: The Magazine for PHP Professionals – www.phparch.com

On Thu, 28 Aug 2003 18:50:55 -0400, you wrote:

>> When you POST a form to the server the server replies with a new
>> page. if you click the Back button in the browser the server wants to
>> re-POST the form. Short of using GET is there a way to prevent
>> re-submitting the previous form?

>One technique is to use a "middle-man" page that processes your POST
>data and inserts it into the database or file or whatever. Then you use
>header() to send the user to another page.

Here's a quick fragment to illustrate the technique. It requires a file
called "list.txt" to exist.

<?
if (isset ($item)) {
$fp = fopen("list.txt", "a");
fputs ($fp, "<tr><td>$item</td></tr>\r\n");
header ("Location: $PHP_SELF");
exit();
}
?>
<table border="1" cellspacing="2">
<?
readfile("list.txt");
?>
</table>
<br><br>
<form method="post" action="<? echo ($PHP_SELF); ?>">
<p>Add Item: <input type="text" name="item"></p>
<p><input type="submit" name="Add" value="Add"></p>
</form>

On Fri, 29 Aug 2003 02:06:55 +0100
David Otton <phpmail@jawbone.freeserve.co.uk> wrote:

> On Thu, 28 Aug 2003 18:50:55 -0400, you wrote:
>
> >> When you POST a form to the server the server replies with a new
> >> page. if you click the Back button in the browser the server wants
> >to> re-POST the form. Short of using GET is there a way to prevent
> >> re-submitting the previous form?
>
> >One technique is to use a "middle-man" page that processes your POST
> >data and inserts it into the database or file or whatever. Then you
> >use header() to send the user to another page.
>
> Here's a quick fragment to illustrate the technique. It requires a
> file called "list.txt" to exist.
>
> <?
> if (isset ($item)) {
> $fp = fopen("list.txt", "a");
> fputs ($fp, "<tr><td>$item</td></tr>\r\n");
> header ("Location: $PHP_SELF");
> exit();
> }
> ?>
> <table border="1" cellspacing="2">
> <?
> readfile("list.txt");
> ?>
> </table>
> <br><br>
> <form method="post" action="<? echo ($PHP_SELF); ?>">
> <p>Add Item: <input type="text" name="item"></p>
> <p><input type="submit" name="Add" value="Add"></p>
> </form>
>

Thanks David.


--
Regards, Andu Novac