I am using an eclass platform on Xampp. When you go directly to a file like www.domain.com/eclass/document.php and not follow the through-the-site navigation you get this.

What info can be extracted by a user, how to avoid it and how much is this harmful to the system ?

```
1146: Table 'eclass.accueil' doesn't exist
                    select `id` from accueil
                    where visible=1 AND lien NOT LIKE '%/user.php'
                    ORDER BY rubrique

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in C:\xampp\htdocs\eclass\include\init.php on line 310

Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\eclass\include\lib\main.lib.php:61) in C:\xampp\htdocs\eclass\include\baseTheme.php on line 60

```