Most of the {{Zend_Controller_Action_Helper_Json}} examples on this page are incorrect: http://framework.zend.com/manual/en/…

+Pass-through options into {{Zend_Json}}+

$this->_helper->json($data, array('enableJsonExprFinder' => true));

Looking at the implementation of {{Zend_Controller_Action_Helper_Json::direct}}, the second argument ({{$sendnow}}) does not accept array:

public function direct($data, $sendNow = true, $keepLayouts = false)
{
    if ($sendNow) {
        return $this->sendJson($data, $keepLayouts);
    }
    return $this->encodeJson($data, $keepLayouts);
}

The parameter {{$keepLayouts}} is the one which is passed through to {{Zend_Json}}, so the proper example would be:

$this->_helper->json($data, true, array('enableJsonExprFinder' => true));

+Shortcut array notation+

This usage (2nd argument as array of options) is completely unsupported:

$this->_helper->json($data, array('keepLayouts' => true));