Help form validation

[eluser]Unknown[/eluser]
Thanks for your answer!

In Code Igniter Guide - Form Validation write:

"You can also process the form data that is passed to your callback and return it. If your callback returns anything other than a boolean TRUE/FALSE it is assumed that the data is your newly processed form data."

In my case, check() function return an array (not boolean). Well, What is the variable that check() function returns value to? If i don't define property info inside class, i access it over what variable.