After updating username how do set that as session

I have an update form and whenever the username gets开发者_开发问答 updated, it messes up the session obviously since thier is a new username. how can i make it so that the user won't ahve to logout and the session will continue with the new info..

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This should work. Post this after your update or insert script.

$username = $_post["username"];

$_post["username"] = $username;