Sometimes it's important to block some fields that can be accessed from outside the model class (for example, the user password).
To block the access to certain fields using the `->` operator, you can declare the `$hidden` array into the model class. This array holds column names that can't be accessed with the `->` operator.
For example:
```php
classUserextendsdbObject{
protected$dbFields=array(
'username'=>array('text','required'),
'password'=>array('text','required'),
'is_admin'=>array('bool'),
'token'=>array('text')
);
protected$hidden=array(
'password','token'
);
}
```
If you try to:
```php
echo$user->password;
echo$user->token;
```
Will return `null`, and also:
```php
$user->password="my-new-password";
```
Won't change the current `password` value.
###Examples
Please look for a use examples in <ahref='tests/dbObjectTests.php'>tests file</a> and test models inside the <ahref='tests/models/'>test models</a> directory