Example (ripped from working code)
<?
$result = mysql_db_query($db,"select * from $prattle_users where uid='$uid' ");
$user = mysql_fetch_object($result);
?>
<h1>Edit profile: <? echo $user->username; ?> </h1>
<P>Real name: <? echo "$user->firstname $user->lastname"; ?>
<FORM method="POST">
<INPUT type="hidden" name="returnto" value="<? echo $HTTP_REFERER ?>">
<P>Email: <BR>
<INPUT type="text" name="email" size="65" value="<? echo $user->email ?>"><BR>
<INPUT type="radio" name="email_public" value=1
<? if ($user->email_public) echo "CHECKED" ?> >Address is public<BR>
<INPUT type="radio" name="email_public" value=0 <? if (!$user->email_public) echo "CHECKED" ?>>Address is private<BR>
<P>Personal homepage: <BR><INPUT name="homepage" type="text" size="65" value="<? echo $user->homepage
?>"><BR>
Et cetera.