* Thus wrote J J ([EMAIL PROTECTED]):
> What is the simplest way to avoid duplicate order
> entry on a form? Some people aren't patient enough to
> wait for the SSL/credit card processing and will click
> the submit button two, three, or more times causing
> duplicate orders.
>
> Is there a quick way to disable the submit button at
> least in javascript? Better yet, something quick and
> easy that could be done server-side without a lot of
> programming like cookies, database flags, etc?
>
Here is a method to prevent user from hitting reload.
yourform.php:
<?php
$valid_form = uniqid(mtrand());
$_SESSION['valid_form'] = $valid_form;
?>
<input type="hidden" name="valid_form" value="<?php echo $valid_form?>">
Then the processing.php:
<?php
ingore_user_abort(1);
$valid_form = $_SESSION['valid_form']; // get the validation
$_SESSION['valid_form'] = ''; // clear validation
if(empty($_GET['valid_form']) ||
$valid_form != $_GET['valid_form']) {
echo "I told you not to reload the damn thing";
exit;
}
// confirm order isn't already being processed...
// ...
// process order
// ...
?>
> I've thought of a few things (like hidden variables
> with an order ID or cookies/flags) but this really
> should be a quick fix since it's not a big problem on
> the site.
>
> Thanks in advance for any tips or techniques!
>
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Curt
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