gistfile1.txt

<?php
// module.config.php
return array(
    'view_manager' => array(
        'strategies' => array(
            'ViewJsonStrategy', // register JSON renderer strategy
        ),
    ),
);

// SomeController.php

public function indexAction()
    {
        return new JsonModel(array('some'=>'data'));
    }


// or, you can do IF your browser requests json? (jquery), otherwise it will render with the normal php strategy, which can be handy... 

public function indexAction()
    {
        return new ViewModel(array('some'=>'data'));
    }