redirect fn

redirect.php

<?php 

       /**
         * Creates a redirect response by calling `render()` and providing a `'location'` parameter.
         *
         * @see lithium\net\http\Router::match()
         * @see lithium\action\Controller::$response
         * @param mixed $url The location to redirect to, provided as a string relative to the root of
         *              the application, a fully-qualified URL, or an array of routing parameters to be
         *              resolved to a URL. Post-processed by `Router::match()`.
         * @param array $options Options when performing the redirect. Available options include:
         *              - `'status'` _integer_: The HTTP status code associated with the redirect.
         *                Defaults to `302`.
         *              - `'head'` _boolean_: Determines whether only headers are returned with the
         *                response. Defaults to `true`, in which case only headers and no body are
         *                returned. Set to `false` to render a body as well.
         *              - `'exit'` _boolean_: Exit immediately after rendering. Defaults to `false`.
         *                Because `redirect()` does not exit by default, you should always prefix calls
         *                with a `return` statement, so that the action is always immediately exited.
         * @return object Returns the instance of the `Response` object associated with this controller.
         * @filter This method can be filtered.
         */
        public function redirect($url, array $options = array()) {
                $router = $this->_classes['router'];
                $defaults = array('location' => null, 'status' => 302, 'head' => true, 'exit' => false);
                $options += $defaults;
                $params = compact('url', 'options');

                $this->_filter(__METHOD__, $params, function($self, $params) use ($router) {
                        $options = $params['options'];
                        $location = $options['location'] ?: $router::match($params['url'], $self->request);
                        $self->render(compact('location') + $options);
                });

                if ($options['exit']) {
                        $this->response->render();
                        $this->_stop();
                }
                return $this->response;
        }