Re: Preventing multiple submits

hey Manuel any manual or readme for that class thing sorry I am totally new bie but this thing is what I need :) ----- Original Message ----- From: "Zak Greant" <zak@php.net> To: "Manuel Lemos" <mlemos@acm.org> Cc: "Pablo Vera" <pvz@vercan.com>; <jd@jamesduncan.co.uk>; <php-windows@lists.php.net> Sent: Friday, August 25, 2000 6:40 PM Subject: Re: [PHP-WIN] Preventing multiple submits > At 02:45 AM 8/25/00 -0300, Manuel Lemos wrote: > >[snip] > >The best solution for really preventing more that one submission of the > >same form on the server side is to use create a unique key and pass it in > >the form as hidden field. Store the key in a database (session data area > >is ideal for this). When the first form submission is received, check if > >the key exists in the database, delete it, accept the form. On further > >submissions, check that the key does no longer exist and warn the user > >that the form was already submitted. > > The user's session id will serve very nicely as the unique key. That is > why I say that only a counter is needed. > > > >I know that JavaScript (or any other Client-Side tool) has its > > >limitations as noted by you before, but with it you will stop the > > >second submission before it is actually sent. The first script will > > >run normally and return its output to the browser, without knowing > > >that the user tried to send the form for a second time. The browser > > >will no cancel that first connection, because it is not posting a > > >second form. > > > >Right, you may want to check this PHP form generation and validation class. > >It has an option to let you specify a text that is used to pop up a > >confirmation box with Javascript that asks the user if he really means to > >submit the form again. The user may confirm or cancel the form submission. > > > >This really works great since most of the times you just want to prevent > >nervous users to submit forms more than once creating inadverted duplicate > >database entries. > > > >http://phpclasses.UpperDesign.com/browse.html/package/1 > > The class is more mature and feature-rich than any other form > generation/validation script that I have run across (or written for that > matter :) - however, it might be a bit intimidating for a new user! > > I suppose that one thing to consider is that javascript is a nice clean way > to stop most re-submissions. PHP can be used along with the js to ensure > robust behavior. > > - zak > > > -- > PHP Windows Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-windows-unsubscribe@lists.php.net > For additional commands, e-mail: php-windows-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > >