best practice with form,validation,error,success,action order

[eluser]BravoAlpha[/eluser]
I do something like this:

Code:

function whatever()
{
    // whatever

    if ($this->validation->run())
    {
        // process the validated input (e.g. database stuff)
        // redirect
    }

    // load view
}

However, you could also follow the example in the user guide:

Code:

function index()
{
    $this->load->library('validation');

    if ($this->validation->run() == FALSE)
    {
        $this->load->view('myform');
    }
    else
    {
        $this->load->view('formsuccess');
    }
}