URI change when calling controller functions

[eluser]Aken[/eluser]
You could use the controller set up as you have shown, and use a method parameter to flag whether or not information should be output, or a redirect to the function page should be used.

Code:

function handler()
{
    if ($action == 'a')
    {
        $this->functionA(true);
    }
}

function functionA($redirect = false)
{
    ...

    if ($redirect === true)
    {
        // Redirect to functionA page.
    } else {
        // Load view
    }
}

You could also use Javascript to change the form's action page based on the button that was called.