Class **Phalcon\\Cache\\Frontend\\Output**
==========================================

*implements* :doc:`Phalcon\\Cache\\FrontendInterface <Phalcon_Cache_FrontendInterface>`

.. role:: raw-html(raw)
   :format: html

:raw-html:`<a href="https://github.com/phalcon/cphalcon/blob/master/phalcon/cache/frontend/output.zep" class="btn btn-default btn-sm">Source on GitHub</a>`

Allows to cache output fragments captured with ob_* functions

.. code-block:: php

    <?php

    *
    * use Phalcon\Tag;
    * use Phalcon\Cache\Backend\File;
    * use Phalcon\Cache\Frontend\Output;
    *
    * // Create an Output frontend. Cache the files for 2 days
    * $frontCache = new Output(
    *     [
    *         "lifetime" => 172800,
    *     ]
    * );
    *
    * // Create the component that will cache from the "Output" to a "File" backend
    * // Set the cache file directory - it's important to keep the "/" at the end of
    * // the value for the folder
    * $cache = new File(
    *     $frontCache,
    *     [
    *         "cacheDir" => "../app/cache/",
    *     ]
    * );
    *
    * // Get/Set the cache file to ../app/cache/my-cache.html
    * $content = $cache->start("my-cache.html");
    *
    * // If $content is null then the content will be generated for the cache
    * if (null === $content) {
    *     // Print date and time
    *     echo date("r");
    *
    *     // Generate a link to the sign-up action
    *     echo Tag::linkTo(
    *         [
    *             "user/signup",
    *             "Sign Up",
    *             "class" => "signup-button",
    *         ]
    *     );
    *
    *     // Store the output into the cache file
    *     $cache->save();
    * } else {
    *     // Echo the cached output
    *     echo $content;
    * }

*


Methods
-------

public  **__construct** ([*array* $frontendOptions])

Phalcon\\Cache\\Frontend\\Output constructor



public  **getLifetime** ()

Returns the cache lifetime



public  **isBuffering** ()

Check whether if frontend is buffering output



public  **start** ()

Starts output frontend. Currently, does nothing



public *string* **getContent** ()

Returns output cached content



public  **stop** ()

Stops output frontend



public  **beforeStore** (*mixed* $data)

Serializes data before storing them



public  **afterRetrieve** (*mixed* $data)

Unserializes data after retrieval