Pass extra parameter to an anonymous validation function

hi,

I see in the documentation that, it is possible to pass a extra parameter to a callback function in the form validation system.
And it works.

But what about when you want to use an anonymous function instead of a callback one ? i've tried to do this way but it didn't worked

PHP Code:

$this->form_validation->set_rules('my_field[]', 'my_field',
        array(array('my_function['.$extra_parameter.']',
          function($value, $extra_parameter)
          {
            // My code
          }) )); 


thanks

finally it is possible to do the following with php >= 5.3 :

PHP Code:

$this->form_validation->set_rules('my_field[]', 'my_field',
       array(array('my_function',
         function($value) use ($extra_parameter)
         {
           // My code
         }) ));