"Page has Expired" on <-Back

[Anon]

Developing an entertainment guide. Have forms for entering all data on each event. Using PHP/MySQL and developing on Windows/PWS platform.

1. Enter all data on a form
2. Error trap to check all appropriate data been entered
3. If not, then display error message stating problem and 'Hit Back to make the change'

But when hit 'Back' states that 'Page has Expired' and have to reload the page. All previous data is then lost. This is REALLY frustrating!

What am I doing wrong?

Thanks

David

[brandonschnell]

don't have the user hit the back button.

the back button is bad, bad, bad.

instead, display the error message and have a button the page to go back to the previous page. have the button submit using hidden fields the data back to the previous page. on the orginal page using php to set the values of the inputs on the form like so:
<INPUT TYPE=TEXT NAME=type_here VALUE="<? echo $type_here; ?>">

this way if another page POSTs the data back to the page the fields will be filled in.

[jeremy_brooks]

...and that is why javascript is more valuable for field checking than PHP in these cases. If you are concerned users will disable javascript in their browsers and sneak by, use the same PHP checks as a backup, and have the PHP-drawn error page written like Brandon suggested: with the posted variables in the URL string, and then echo'd in the form fields.

[Anon]

I'll guess you might be using sessions. If you go into the php.ini file, scroll down to the area for sessions, and change session.cache_limiter=nocache to:

session.cache_limiter=;

In other words, leave that session value blank. Don't even put in empty quotes.

Now you won't get page Page Expired warnings (or at least, not nearly as much).