Refresh web page?

Hi, Can someone help me out here? I've got a web page with embedded php scripts which read and update a MySQL database. Default values in a form are taken from the db, and altered values are written back. How do I refresh the page so that the form entries reflect the changes made? Currently when I submit the changed values the database is correctly updated but the page is redisplayed with the old defaults back in place, making users think the update has failed. I'm sure I'm missing something obvious, but I've spent hours browsing through the docs without finding anything useful. TIA, Andy