$viewRenderer = new Zend_Controller_Action_Helper_ViewRenderer();
$viewRenderer->setView($view)
       ->setViewSuffix('php');
Zend_Controller_Action_HelperBroker::addHelper($viewRenderer);

$viewRenderer = Zend_Controller_Action_HelperBroker::getStaticHelper('viewRenderer');
$viewRenderer->setView($view)
       ->setViewSuffix('php');

// A controller class, foo module:
class Foo_BarController extends Zend_Controller_Action
{
  // Render bar/index.phtml by default; no action required
  public function indexAction()
  {
  }
  // Render bar/populate.phtml with variable 'foo' set to 'bar'.
  // Since view object defined at preDispatch(), it's already available.
  public function populateAction()
  {
    $this->view->foo = 'bar';
  }
}
...
// in one of your view scripts:
$this->foo(); // call Foo_View_Helper_Foo::foo()

// Render 'foo' instead of current action script
$this->_helper->viewRenderer('foo');
// render form.phtml to the 'html' response segment, without using a
// controller view script subdirectory:
$this->_helper->viewRenderer('form', 'html', true);

$view  = new Zend_View(array('encoding' => 'UTF-8'));
$options = array('noController' => true, 'neverRender' => true);
$viewRenderer =
  new Zend_Controller_Action_Helper_ViewRenderer($view, $options);

// In your bootstrap:
Zend_Controller_Action_HelperBroker::getStaticHelper('viewRenderer');
...
// 'foo' module, 'bar' controller:
class Foo_BarController extends Zend_Controller_Action
{
  // Render bar/index.phtml by default; no action required
  public function indexAction()
  {
  }
  // Render bar/populate.phtml with variable 'foo' set to 'bar'.
  // Since view object defined at preDispatch(), it's already available.
  public function populateAction()
  {
    $this->view->foo = 'bar';
  }
  // Renders nothing as it forwards to another action; the new action
  // will perform any rendering
  public function bazAction()
  {
    $this->_forward('index');
  }
  // Renders nothing as it redirects to another location
  public function batAction()
  {
    $this->_redirect('/index');
  }
}

// Baz controller class, bar module:
class Bar_BazController extends Zend_Controller_Action
{
  public function fooAction()
  {
    // Don't auto render this action
    <strong>$this->_helper->viewRenderer->setNoRender();</strong>
  }
}
// Bat controller class, bar module:
class Bar_BatController extends Zend_Controller_Action
{
  public function preDispatch()
  {
    // Never auto render this controller's actions
    $this->_helper->viewRenderer->setNoRender();
  }
}

// Bar controller class, foo module:
class Foo_BarController extends Zend_Controller_Action
{
  public function addAction()
  {
    // Render 'bar/form.phtml' instead of 'bar/add.phtml'
    $this->_helper->viewRenderer('form');
  }
  public function editAction()
  {
    // Render 'bar/form.phtml' instead of 'bar/edit.phtml'
    $this->_helper->viewRenderer->setScriptAction('form');
  }
  public function processAction()
  {
    // do some validation...
    if (!$valid) {
      // Render 'bar/form.phtml' instead of 'bar/process.phtml'
      $this->_helper->viewRenderer->setRender('form');
      return;
    }
    // otherwise continue processing...
  }
}

// Bar controller class, foo module:
class Foo_BarController extends Zend_Controller_Action
{
  public function preDispatch()
  {
    // change view encoding
    $this->view->setEncoding('UTF-8');
  }
  public function bazAction()
  {
    // Get view object and set escape callback to 'htmlspecialchars'
    $view = $this->_helper->viewRenderer->view;
    $view->setEscape('htmlspecialchars');
  }
}

/**
 * In your bootstrap:
 */
// Different view implementation
$view = new ZF_Smarty();
$viewRenderer = new Zend_Controller_Action_Helper_ViewRenderer($view);
$viewRenderer->setViewBasePathSpec('/opt/vendor/templates')
       ->setViewScriptPathSpec(':module/:controller/:action.:suffix')
       ->setViewScriptPathNoControllerSpec(':action.:suffix')
       ->setViewSuffix('tpl');
Zend_Controller_Action_HelperBroker::addHelper($viewRenderer);

class SearchController extends Zend_Controller_Action
{
  public function resultsAction()
  {
    // Assume $this->model is the current model
    $this->view->results =
      $this->model->find($this->_getParam('query', '');
    // render() by default proxies to the ViewRenderer
    // Render first the search form and then the results
    $this->render('form');
    $this->render('results');
  }
  public function formAction()
  {
    // do nothing; ViewRenderer autorenders the view script
  }
}

<?php
/**
 * @see Zend_Controller_Action_Helper_Abstract
 */
require_once 'Zend/Controller/Action/Helper/Abstract.php';
/**
 * @see Zend_View
 */
require_once 'Zend/View.php';
/**
 * View script integration
 *
 * Zend_Controller_Action_Helper_ViewRenderer provides transparent view
 * integration for action controllers. It allows you to create a view object
 * once, and populate it throughout all actions. Several global options may be
 * set:
 *
 * - noController: if set true, render() will not look for view scripts in
 *  subdirectories named after the controller
 * - viewSuffix: what view script filename suffix to use
 *
 * The helper autoinitializes the action controller view preDispatch(). It
 * determines the path to the class file, and then determines the view base
 * directory from there. It also uses the module name as a class prefix for
 * helpers and views such that if your module name is 'Search', it will set the
 * helper class prefix to 'Search_View_Helper' and the filter class prefix to ;
 * 'Search_View_Filter'.
 *
 * Usage:
 * <code>
 * // In your bootstrap:
 * Zend_Controller_Action_HelperBroker::addHelper(new Zend_Controller_Action_Helper_ViewRenderer());
 *
 * // In your action controller methods:
 * $viewHelper = $this->_helper->getHelper('view');
 *
 * // Don't use controller subdirectories
 * $viewHelper->setNoController(true);
 *
 * // Specify a different script to render:
 * $this->_helper->viewRenderer('form');
 *
 * </code>
 *
 * @uses    Zend_Controller_Action_Helper_Abstract
 * @package  Zend_Controller
 * @subpackage Zend_Controller_Action_Helper
 * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license  http://framework.zend.com/license/new-bsd   New BSD License
 */
class Zend_Controller_Action_Helper_ViewRenderer extends Zend_Controller_Action_Helper_Abstract
{
  /**
   * @var Zend_View_Interface
   */
  public $view;
  /**
   * Word delimiters
   * @var array
   */
  protected $_delimiters;
  /**
   * @var Zend_Filter_Inflector
   */
  protected $_inflector;
  /**
   * Inflector target
   * @var string
   */
  protected $_inflectorTarget = '';
  /**
   * Current module directory
   * @var string
   */
  protected $_moduleDir = '';
  /**
   * Whether or not to autorender using controller name as subdirectory;
   * global setting (not reset at next invocation)
   * @var boolean
   */
  protected $_neverController = false;
  /**
   * Whether or not to autorender postDispatch; global setting (not reset at
   * next invocation)
   * @var boolean
   */
  protected $_neverRender   = false;
  /**
   * Whether or not to use a controller name as a subdirectory when rendering
   * @var boolean
   */
  protected $_noController  = false;
  /**
   * Whether or not to autorender postDispatch; per controller/action setting (reset
   * at next invocation)
   * @var boolean
   */
  protected $_noRender    = false;
  /**
   * Characters representing path delimiters in the controller
   * @var string|array
   */
  protected $_pathDelimiters;
  /**
   * Which named segment of the response to utilize
   * @var string
   */
  protected $_responseSegment = null;
  /**
   * Which action view script to render
   * @var string
   */
  protected $_scriptAction  = null;
  /**
   * View object basePath
   * @var string
   */
  protected $_viewBasePathSpec = ':moduleDir/views';
  /**
   * View script path specification string
   * @var string
   */
  protected $_viewScriptPathSpec = ':controller/:action.:suffix';
  /**
   * View script path specification string, minus controller segment
   * @var string
   */
  protected $_viewScriptPathNoControllerSpec = ':action.:suffix';
  /**
   * View script suffix
   * @var string
   */
  protected $_viewSuffix   = 'phtml';
  /**
   * Constructor
   *
   * Optionally set view object and options.
   *
   * @param Zend_View_Interface $view
   * @param array        $options
   * @return void
   */
  public function __construct(Zend_View_Interface $view = null, array $options = array())
  {
    if (null !== $view) {
      $this->setView($view);
    }
    if (!empty($options)) {
      $this->_setOptions($options);
    }
  }
  /**
   * Clone - also make sure the view is cloned.
   *
   * @return void
   */
  public function __clone()
  {
    if (isset($this->view) && $this->view instanceof Zend_View_Interface) {
      $this->view = clone $this->view;
    }
  }
  /**
   * Set the view object
   *
   * @param Zend_View_Interface $view
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setView(Zend_View_Interface $view)
  {
    $this->view = $view;
    return $this;
  }
  /**
   * Get current module name
   *
   * @return string
   */
  public function getModule()
  {
    $request = $this->getRequest();
    $module = $request->getModuleName();
    if (null === $module) {
      $module = $this->getFrontController()->getDispatcher()->getDefaultModule();
    }
    return $module;
  }
  /**
   * Get module directory
   *
   * @throws Zend_Controller_Action_Exception
   * @return string
   */
  public function getModuleDirectory()
  {
    $module  = $this->getModule();
    $moduleDir = $this->getFrontController()->getControllerDirectory($module);
    if ((null === $moduleDir) || is_array($moduleDir)) {
      /**
       * @see Zend_Controller_Action_Exception
       */
      require_once 'Zend/Controller/Action/Exception.php';
      throw new Zend_Controller_Action_Exception('ViewRenderer cannot locate module directory for module "' . $module . '"');
    }
    $this->_moduleDir = dirname($moduleDir);
    return $this->_moduleDir;
  }
  /**
   * Get inflector
   *
   * @return Zend_Filter_Inflector
   */
  public function getInflector()
  {
    if (null === $this->_inflector) {
      /**
       * @see Zend_Filter_Inflector
       */
      require_once 'Zend/Filter/Inflector.php';
      /**
       * @see Zend_Filter_PregReplace
       */
      require_once 'Zend/Filter/PregReplace.php';
      /**
       * @see Zend_Filter_Word_UnderscoreToSeparator
       */
      require_once 'Zend/Filter/Word/UnderscoreToSeparator.php';
      $this->_inflector = new Zend_Filter_Inflector();
      $this->_inflector->setStaticRuleReference('moduleDir', $this->_moduleDir) // moduleDir must be specified before the less specific 'module'
         ->addRules(array(
           ':module'   => array('Word_CamelCaseToDash', 'StringToLower'),
           ':controller' => array('Word_CamelCaseToDash', new Zend_Filter_Word_UnderscoreToSeparator('/'), 'StringToLower', new Zend_Filter_PregReplace('/\./', '-')),
           ':action'   => array('Word_CamelCaseToDash', new Zend_Filter_PregReplace('#[^a-z0-9' . preg_quote('/', '#') . ']+#i', '-'), 'StringToLower'),
         ))
         ->setStaticRuleReference('suffix', $this->_viewSuffix)
         ->setTargetReference($this->_inflectorTarget);
    }
    // Ensure that module directory is current
    $this->getModuleDirectory();
    return $this->_inflector;
  }
  /**
   * Set inflector
   *
   * @param Zend_Filter_Inflector $inflector
   * @param boolean        $reference Whether the moduleDir, target, and suffix should be set as references to ViewRenderer properties
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setInflector(Zend_Filter_Inflector $inflector, $reference = false)
  {
    $this->_inflector = $inflector;
    if ($reference) {
      $this->_inflector->setStaticRuleReference('suffix', $this->_viewSuffix)
         ->setStaticRuleReference('moduleDir', $this->_moduleDir)
         ->setTargetReference($this->_inflectorTarget);
    }
    return $this;
  }
  /**
   * Set inflector target
   *
   * @param string $target
   * @return void
   */
  protected function _setInflectorTarget($target)
  {
    $this->_inflectorTarget = (string) $target;
  }
  /**
   * Set internal module directory representation
   *
   * @param string $dir
   * @return void
   */
  protected function _setModuleDir($dir)
  {
    $this->_moduleDir = (string) $dir;
  }
  /**
   * Get internal module directory representation
   *
   * @return string
   */
  protected function _getModuleDir()
  {
    return $this->_moduleDir;
  }
  /**
   * Generate a class prefix for helper and filter classes
   *
   * @return string
   */
  protected function _generateDefaultPrefix()
  {
    $default = 'Zend_View';
    if (null === $this->_actionController) {
      return $default;
    }
    $class = get_class($this->_actionController);
    if (!strstr($class, '_')) {
      return $default;
    }
    $module = $this->getModule();
    if ('default' == $module) {
      return $default;
    }
    $prefix = substr($class, 0, strpos($class, '_')) . '_View';
    return $prefix;
  }
  /**
   * Retrieve base path based on location of current action controller
   *
   * @return string
   */
  protected function _getBasePath()
  {
    if (null === $this->_actionController) {
      return './views';
    }
    $inflector = $this->getInflector();
    $this->_setInflectorTarget($this->getViewBasePathSpec());
    $dispatcher = $this->getFrontController()->getDispatcher();
    $request = $this->getRequest();
    $parts = array(
      'module'   => (($moduleName = $request->getModuleName()) != '') ? $dispatcher->formatModuleName($moduleName) : $moduleName,
      'controller' => $request->getControllerName(),
      'action'   => $dispatcher->formatActionName($request->getActionName())
      );
    $path = $inflector->filter($parts);
    return $path;
  }
  /**
   * Set options
   *
   * @param array $options
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  protected function _setOptions(array $options)
  {
    foreach ($options as $key => $value)
    {
      switch ($key) {
        case 'neverRender':
        case 'neverController':
        case 'noController':
        case 'noRender':
          $property = '_' . $key;
          $this->{$property} = ($value) ? true : false;
          break;
        case 'responseSegment':
        case 'scriptAction':
        case 'viewBasePathSpec':
        case 'viewScriptPathSpec':
        case 'viewScriptPathNoControllerSpec':
        case 'viewSuffix':
          $property = '_' . $key;
          $this->{$property} = (string) $value;
          break;
        default:
          break;
      }
    }
    return $this;
  }
  /**
   * Initialize the view object
   *
   * $options may contain the following keys:
   * - neverRender - flag dis/enabling postDispatch() autorender (affects all subsequent calls)
   * - noController - flag indicating whether or not to look for view scripts in subdirectories named after the controller
   * - noRender - flag indicating whether or not to autorender postDispatch()
   * - responseSegment - which named response segment to render a view script to
   * - scriptAction - what action script to render
   * - viewBasePathSpec - specification to use for determining view base path
   * - viewScriptPathSpec - specification to use for determining view script paths
   * - viewScriptPathNoControllerSpec - specification to use for determining view script paths when noController flag is set
   * - viewSuffix - what view script filename suffix to use
   *
   * @param string $path
   * @param string $prefix
   * @param array $options
   * @throws Zend_Controller_Action_Exception
   * @return void
   */
  public function initView($path = null, $prefix = null, array $options = array())
  {
    if (null === $this->view) {
      $this->setView(new Zend_View());
    }
    // Reset some flags every time
    $options['noController'] = (isset($options['noController'])) ? $options['noController'] : false;
    $options['noRender']   = (isset($options['noRender'])) ? $options['noRender'] : false;
    $this->_scriptAction   = null;
    $this->_responseSegment = null;
    // Set options first; may be used to determine other initializations
    $this->_setOptions($options);
    // Get base view path
    if (empty($path)) {
      $path = $this->_getBasePath();
      if (empty($path)) {
        /**
         * @see Zend_Controller_Action_Exception
         */
        require_once 'Zend/Controller/Action/Exception.php';
        throw new Zend_Controller_Action_Exception('ViewRenderer initialization failed: retrieved view base path is empty');
      }
    }
    if (null === $prefix) {
      $prefix = $this->_generateDefaultPrefix();
    }
    // Determine if this path has already been registered
    $currentPaths = $this->view->getScriptPaths();
    $path     = str_replace(array('/', '\\'), '/', $path);
    $pathExists  = false;
    foreach ($currentPaths as $tmpPath) {
      $tmpPath = str_replace(array('/', '\\'), '/', $tmpPath);
      if (strstr($tmpPath, $path)) {
        $pathExists = true;
        break;
      }
    }
    if (!$pathExists) {
      $this->view->addBasePath($path, $prefix);
    }
    // Register view with action controller (unless already registered)
    if ((null !== $this->_actionController) && (null === $this->_actionController->view)) {
      $this->_actionController->view    = $this->view;
      $this->_actionController->viewSuffix = $this->_viewSuffix;
    }
  }
  /**
   * init - initialize view
   *
   * @return void
   */
  public function init()
  {
    if ($this->getFrontController()->getParam('noViewRenderer')) {
      return;
    }
    $this->initView();
  }
  /**
   * Set view basePath specification
   *
   * Specification can contain one or more of the following:
   * - :moduleDir - current module directory
   * - :controller - name of current controller in the request
   * - :action - name of current action in the request
   * - :module - name of current module in the request
   *
   * @param string $path
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setViewBasePathSpec($path)
  {
    $this->_viewBasePathSpec = (string) $path;
    return $this;
  }
  /**
   * Retrieve the current view basePath specification string
   *
   * @return string
   */
  public function getViewBasePathSpec()
  {
    return $this->_viewBasePathSpec;
  }
  /**
   * Set view script path specification
   *
   * Specification can contain one or more of the following:
   * - :moduleDir - current module directory
   * - :controller - name of current controller in the request
   * - :action - name of current action in the request
   * - :module - name of current module in the request
   *
   * @param string $path
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setViewScriptPathSpec($path)
  {
    $this->_viewScriptPathSpec = (string) $path;
    return $this;
  }
  /**
   * Retrieve the current view script path specification string
   *
   * @return string
   */
  public function getViewScriptPathSpec()
  {
    return $this->_viewScriptPathSpec;
  }
  /**
   * Set view script path specification (no controller variant)
   *
   * Specification can contain one or more of the following:
   * - :moduleDir - current module directory
   * - :controller - name of current controller in the request
   * - :action - name of current action in the request
   * - :module - name of current module in the request
   *
   * :controller will likely be ignored in this variant.
   *
   * @param string $path
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setViewScriptPathNoControllerSpec($path)
  {
    $this->_viewScriptPathNoControllerSpec = (string) $path;
    return $this;
  }
  /**
   * Retrieve the current view script path specification string (no controller variant)
   *
   * @return string
   */
  public function getViewScriptPathNoControllerSpec()
  {
    return $this->_viewScriptPathNoControllerSpec;
  }
  /**
   * Get a view script based on an action and/or other variables
   *
   * Uses values found in current request if no values passed in $vars.
   *
   * If {@link $_noController} is set, uses {@link $_viewScriptPathNoControllerSpec};
   * otherwise, uses {@link $_viewScriptPathSpec}.
   *
   * @param string $action
   * @param array $vars
   * @return string
   */
  public function getViewScript($action = null, array $vars = array())
  {
    $request = $this->getRequest();
    if ((null === $action) && (!isset($vars['action']))) {
      $action = $this->getScriptAction();
      if (null === $action) {
        $action = $request->getActionName();
      }
      $vars['action'] = $action;
    } elseif (null !== $action) {
      $vars['action'] = $action;
    }
    $replacePattern = array('/[^a-z0-9]+$/i', '/^[^a-z0-9]+/i');
    $vars['action'] = preg_replace($replacePattern, '', $vars['action']);
    $inflector = $this->getInflector();
    if ($this->getNoController() || $this->getNeverController()) {
      $this->_setInflectorTarget($this->getViewScriptPathNoControllerSpec());
    } else {
      $this->_setInflectorTarget($this->getViewScriptPathSpec());
    }
    return $this->_translateSpec($vars);
  }
  /**
   * Set the neverRender flag (i.e., globally dis/enable autorendering)
   *
   * @param boolean $flag
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setNeverRender($flag = true)
  {
    $this->_neverRender = ($flag) ? true : false;
    return $this;
  }
  /**
   * Retrieve neverRender flag value
   *
   * @return boolean
   */
  public function getNeverRender()
  {
    return $this->_neverRender;
  }
  /**
   * Set the noRender flag (i.e., whether or not to autorender)
   *
   * @param boolean $flag
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setNoRender($flag = true)
  {
    $this->_noRender = ($flag) ? true : false;
    return $this;
  }
  /**
   * Retrieve noRender flag value
   *
   * @return boolean
   */
  public function getNoRender()
  {
    return $this->_noRender;
  }
  /**
   * Set the view script to use
   *
   * @param string $name
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setScriptAction($name)
  {
    $this->_scriptAction = (string) $name;
    return $this;
  }
  /**
   * Retrieve view script name
   *
   * @return string
   */
  public function getScriptAction()
  {
    return $this->_scriptAction;
  }
  /**
   * Set the response segment name
   *
   * @param string $name
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setResponseSegment($name)
  {
    if (null === $name) {
      $this->_responseSegment = null;
    } else {
      $this->_responseSegment = (string) $name;
    }
    return $this;
  }
  /**
   * Retrieve named response segment name
   *
   * @return string
   */
  public function getResponseSegment()
  {
    return $this->_responseSegment;
  }
  /**
   * Set the noController flag (i.e., whether or not to render into controller subdirectories)
   *
   * @param boolean $flag
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setNoController($flag = true)
  {
    $this->_noController = ($flag) ? true : false;
    return $this;
  }
  /**
   * Retrieve noController flag value
   *
   * @return boolean
   */
  public function getNoController()
  {
    return $this->_noController;
  }
  /**
   * Set the neverController flag (i.e., whether or not to render into controller subdirectories)
   *
   * @param boolean $flag
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setNeverController($flag = true)
  {
    $this->_neverController = ($flag) ? true : false;
    return $this;
  }
  /**
   * Retrieve neverController flag value
   *
   * @return boolean
   */
  public function getNeverController()
  {
    return $this->_neverController;
  }
  /**
   * Set view script suffix
   *
   * @param string $suffix
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setViewSuffix($suffix)
  {
    $this->_viewSuffix = (string) $suffix;
    return $this;
  }
  /**
   * Get view script suffix
   *
   * @return string
   */
  public function getViewSuffix()
  {
    return $this->_viewSuffix;
  }
  /**
   * Set options for rendering a view script
   *
   * @param string $action    View script to render
   * @param string $name     Response named segment to render to
   * @param boolean $noController Whether or not to render within a subdirectory named after the controller
   * @return Zend_Controller_Action_Helper_ViewRenderer Provides a fluent interface
   */
  public function setRender($action = null, $name = null, $noController = null)
  {
    if (null !== $action) {
      $this->setScriptAction($action);
    }
    if (null !== $name) {
      $this->setResponseSegment($name);
    }
    if (null !== $noController) {
      $this->setNoController($noController);
    }
    return $this;
  }
  /**
   * Inflect based on provided vars
   *
   * Allowed variables are:
   * - :moduleDir - current module directory
   * - :module - current module name
   * - :controller - current controller name
   * - :action - current action name
   * - :suffix - view script file suffix
   *
   * @param array $vars
   * @return string
   */
  protected function _translateSpec(array $vars = array())
  {
    $inflector = $this->getInflector();
    $request  = $this->getRequest();
    $dispatcher = $this->getFrontController()->getDispatcher();
    $module   = $dispatcher->formatModuleName($request->getModuleName());
    $controller = $request->getControllerName();
    $action   = $dispatcher->formatActionName($request->getActionName());
    $params   = compact('module', 'controller', 'action');
    foreach ($vars as $key => $value) {
      switch ($key) {
        case 'module':
        case 'controller':
        case 'action':
        case 'moduleDir':
        case 'suffix':
          $params[$key] = (string) $value;
          break;
        default:
          break;
      }
    }
    if (isset($params['suffix'])) {
      $origSuffix = $this->getViewSuffix();
      $this->setViewSuffix($params['suffix']);
    }
    if (isset($params['moduleDir'])) {
      $origModuleDir = $this->_getModuleDir();
      $this->_setModuleDir($params['moduleDir']);
    }
    $filtered = $inflector->filter($params);
    if (isset($params['suffix'])) {
      $this->setViewSuffix($origSuffix);
    }
    if (isset($params['moduleDir'])) {
      $this->_setModuleDir($origModuleDir);
    }
    return $filtered;
  }
  /**
   * Render a view script (optionally to a named response segment)
   *
   * Sets the noRender flag to true when called.
   *
   * @param string $script
   * @param string $name
   * @return void
   */
  public function renderScript($script, $name = null)
  {
    if (null === $name) {
      $name = $this->getResponseSegment();
    }
    $this->getResponse()->appendBody(
      $this->view->render($script),
      $name
    );
    $this->setNoRender();
  }
  /**
   * Render a view based on path specifications
   *
   * Renders a view based on the view script path specifications.
   *
   * @param string $action
   * @param string $name
   * @param boolean $noController
   * @return void
   */
  public function render($action = null, $name = null, $noController = null)
  {
    $this->setRender($action, $name, $noController);
    $path = $this->getViewScript();
    $this->renderScript($path, $name);
  }
  /**
   * Render a script based on specification variables
   *
   * Pass an action, and one or more specification variables (view script suffix)
   * to determine the view script path, and render that script.
   *
   * @param string $action
   * @param array $vars
   * @param string $name
   * @return void
   */
  public function renderBySpec($action = null, array $vars = array(), $name = null)
  {
    if (null !== $name) {
      $this->setResponseSegment($name);
    }
    $path = $this->getViewScript($action, $vars);
    $this->renderScript($path);
  }
  /**
   * postDispatch - auto render a view
   *
   * Only autorenders if:
   * - _noRender is false
   * - action controller is present
   * - request has not been re-dispatched (i.e., _forward() has not been called)
   * - response is not a redirect
   *
   * @return void
   */
  public function postDispatch()
  {
    if ($this->_shouldRender()) {
      $this->render();
    }
  }
  /**
   * Should the ViewRenderer render a view script?
   *
   * @return boolean
   */
  protected function _shouldRender()
  {
    return (!$this->getFrontController()->getParam('noViewRenderer')
      && !$this->_neverRender
      && !$this->_noRender
      && (null !== $this->_actionController)
      && $this->getRequest()->isDispatched()
      && !$this->getResponse()->isRedirect()
    );
  }
  /**
   * Use this helper as a method; proxies to setRender()
   *
   * @param string $action
   * @param string $name
   * @param boolean $noController
   * @return void
   */
  public function direct($action = null, $name = null, $noController = null)
  {
    $this->setRender($action, $name, $noController);
  }
}