refresh

[Stijn Goris]

hi all,

Is there a way to prevent a refresh of a page?
When a user refreshen on a certain page, pictures he already uploaded, will
upload again...

regards
Stijn

[Chip]

Stijn Goris wrote:

hi all,

Is there a way to prevent a refresh of a page?
When a user refreshen on a certain page, pictures he already uploaded, will
upload again...

regards
Stijn

Do you mean downloaded or uploaded? Downloading is usually handled by
the browser cache settings and images aren't actually downloaded a
second time.

[Shawn Wilson]

Stijn Goris wrote:

Is there a way to prevent a refresh of a page?
When a user refreshen on a certain page, pictures he already uploaded, will
upload again...

You could do something like this in your form:

<input type="hidden" name="uniqueid" value="<?PHP echo uniqid(); ?>">

And in your handling code, put something like this:

$file = file("logfile.txt");

//if form has been sent, make the user obtain a new unique id
if (in_array($_POST['uniqueid'], $file)):
echo 'The form has already been sent. Click <a href="foo.php">here</a> to
send again.';

else:
//Process your file uploads as you do now.

//write unique id to logfile
if ($logfile = fopen("logfile.txt", "a")) {
fwrite($logfile, $_POST['uniqueid']);
fclose($logfile);
}

endif;

You'd have to periodically clean out the logfile. You could also use a database
table to do this.

Regards,
Shawn
--
Shawn Wilson
sh***@glassgiant.com
http://www.glassgiant.com

[Shawn Wilson]

Shawn Wilson wrote:

Stijn Goris wrote:

Is there a way to prevent a refresh of a page?
When a user refreshen on a certain page, pictures he already uploaded, will
upload again...

You could do something like this in your form:

<input type="hidden" name="uniqueid" value="<?PHP echo uniqid(); ?>">

And in your handling code, put something like this:

$file = file("logfile.txt");

//if form has been sent, make the user obtain a new unique id
if (in_array($_POST['uniqueid'], $file)):
echo 'The form has already been sent. Click <a href="foo.php">here</a> to
send again.';

else:
//Process your file uploads as you do now.

//write unique id to logfile
if ($logfile = fopen("logfile.txt", "a")) {
fwrite($logfile, $_POST['uniqueid']);
fclose($logfile);
}

endif;

You'd have to periodically clean out the logfile. You could also use a database
table to do this.

Or, if you prefer an example that has a chance of working, try this line
instead:

fwrite($logfile, $_POST['uniqueid']."\n");

Regards,
Shawn
--
Shawn Wilson
sh***@glassgiant.com
http://www.glassgiant.com

[CountScubula]

http://www.gzentools.com -- free online php tools
"Stijn Goris" <me*****@hotmail.com> wrote in message
news:bd********************@phobos.telenet-ops.be...

hi all,

Is there a way to prevent a refresh of a page?
When a user refreshen on a certain page, pictures he already uploaded, will upload again...

regards
Stijn

I take it at the moment you have 2 parts, 1-an upload form, 2-upload
script/page, change this to 3 parts,
1-upload form, 2-upload script, 3-page.
At the end of you upload script, redirtect to the destination page with this

<?php
// code to handle file upload

header("Location: http://www.yourdomain.com/nextpage.php");
?>

then if they refresh next page, it will not upload again.

--
Mike Bradley