Well lets say you have a table. In this table you have fields/Columns. You would need a auto incretment id column for keeping track to the info for each user. Then you need a field for username and then fields for the rest of information.
Basically You would use variables in the URL to the page to load the different pages for different usernames
like
http://mysite.com/loaduserinfo.php?user=batman
would load username batman by grabing the variable outa the URL using
$user = $_GET['user'];
then simply query the database Where userfield = '$user'
$query = "SELECT infofieldshere FROM tablename Where userfield = '$user'";
that query will grab only the user that was in the URL
hope that helps
[]Deace Out