set_rules used multiple times

[eluser]rajend3[/eluser]
I have two methods that use the same validation but 1 of them uses a subset of the inputs and rules.

So I have a $config variable in my user_controller class so if the validation changes I don't have to change them in two places.

Code:

private $userInputConfig = array(
  array(
     "field"   => "fullName",
     "label"   => "Full Name",
     "rules"   => "required"
   ),
  array(
     "field"   => "address",
     "label"   => "Address",
     "rules"   => "required"
   ),
  array(
     "field"   => "email",
     "label"   => "Email",
     "rules"   => "required|valid_email"
   ),  
  array(
     "field"   => "password",
     "label"   => "Password",
     "rules"   => "required|min_length[8]"
   )
  );

My first method calls

Code:

$this->form_validation->set_rules(array_slice($userInputConfig,0,2));

and my second one calls

Code:

$this->form_validation->set_rules($userInputConfig);

I get an error saying

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: userInputConfig

Filename: controllers/user_controller.php

Line Number: 42

Any ideas of how I can fix this?