Question

Could you all give me an idea on how can i hide a specific value from an unregisted user? But once a user logins, that value should be visible?

Answer 1

Use sessions. Once user logs in, set a flag or user id in $_SESSION array. Later, you can check this flag and generate different output for registered/unregistered user. I.e.

if ($_SESSION['logged_id'])
{
    // print protected contents
}
else 
{
   // print public contents
}