RE: [PHP] Re: [Repost] Getting rid of "Web page has expired" (POSTDATA Error)

Robert Samuel White wrote: > You might want to modify your coding. The way I prevent this problem > from ever happening is this: > > > > 1. The user completes information on the form. > > 2. The form is validated by PHP. > > 3. If there are errors, then the form is reshown with their values > populated. > > 4. Once all errors are corrected, I process the form and then use a > Header("Location: ") to redirect the user to the same page (or > another page). > > > > This has the advantage of allowing a user to click the back button > and seeing their form with their values still intact. > > > > This prevents a method post page from being in the user's browser > history. Now one thing bothers me: how do you redirect in step 4 if you have shown the form in step 3? How do you avoid a "Cannot modify header information - headers already sent by ..." error message? Nicolas Verhaeghe E-mail: nicolas@whiteecho.com Phone: 602-490-8000