Create seperate documents:  one to display the form and another to process
the form.  

        add.php // displays new form
        add_handler.php  // process form input

On the form processing, check for the presence of HTTP_POST_VARS before

if (isset($HTTP_POST_VARS))
        ###  process form ###
        header("Location: add.php");

> -----Original Message-----
> From: [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, June 12, 2002 3:29 PM
> Subject: [PHP] F5 problem...
> Hello group,
> I need a good solution to prevent sending form data to server 
> after hiting
> refresh. How can PHP know  that user hit refresh and sent 
> data that already
> have been  stored in database (without querying database)?
> Remek
> -- 
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