Class Phalcon\Cache\Backend\File

extends abstract class Phalcon\Cache\Backend

implements Phalcon\Cache\BackendInterface

Allows to cache output fragments using a file backend

//Cache the file for 2 days
$frontendOptions = array(
    'lifetime' => 172800
);

  //Create a output cache
  $frontCache = \Phalcon\Cache\Frontend\Output($frontOptions);

//Set the cache directory
$backendOptions = array(
    'cacheDir' => '../app/cache/'
);

  //Create the File backend
  $cache = new \Phalcon\Cache\Backend\File($frontCache, $backendOptions);

$content = $cache->start('my-cache');
if ($content === null) {
    echo '<h1>', time(), '</h1>';
    $cache->save();
} else {
    echo $content;
}

Methods

public __construct (Phalcon\Cache\FrontendInterface $frontend, [array $options])

Phalcon\Cache\Backend\File constructor

public mixed get (int|string $keyName, [long $lifetime])

Returns a cached content

public save ([int|string $keyName], [string $content], [long $lifetime], [boolean $stopBuffer])

Stores cached content into the file backend and stops the frontend

public boolean delete (int|string $keyName)

Deletes a value from the cache by its key

public array queryKeys ([string $prefix])

Query the existing cached keys

public boolean exists ([string $keyName], [long $lifetime])

Checks if cache exists and it isn’t expired

public mixed increment ([unknown $key_name], [long $value])

Increment of a given key, by number $value

public mixed decrement ([unknown $key_name], [long $value])

Decrement of a given key, by number $value

public boolean flush ()

Immediately invalidates all existing items.

public mixed start (int|string $keyName, [long $lifetime]) inherited from Phalcon\Cache\Backend

Starts a cache. The $keyname allows to identify the created fragment

public stop ([boolean $stopBuffer]) inherited from Phalcon\Cache\Backend

Stops the frontend without store any cached content

public mixed getFrontend () inherited from Phalcon\Cache\Backend

Returns front-end instance adapter related to the back-end

public array getOptions () inherited from Phalcon\Cache\Backend

Returns the backend options

public boolean isFresh () inherited from Phalcon\Cache\Backend

Checks whether the last cache is fresh or cached

public boolean isStarted () inherited from Phalcon\Cache\Backend

Checks whether the cache has starting buffering or not

public setLastKey (string $lastKey) inherited from Phalcon\Cache\Backend

Sets the last key used in the cache

public string getLastKey () inherited from Phalcon\Cache\Backend

Gets the last key stored by the cache

public int getLifetime () inherited from Phalcon\Cache\Backend

Gets the last lifetime set