来自控制器的codeigniter form_validation

i would like to access the following variable

<?php echo validation_errors(); ?>

From my controller. I tried

$this->form_validation->validation_errors();

With no luck. Not sure if this is even possible

Since validation_errors() is a helper function, you can use it as it is in controller. i.e. in your controller:

<?php echo validation_errors(); ?>

You'll need to load the helper first, of course.