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<?php |
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namespace Anax\Cache; |
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/** |
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* File based cache in line with PSR-3. |
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* |
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*/ |
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class FileCache |
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{ |
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/** |
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* Create a key to use for the cache. |
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* |
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* @param string $class name of the class, including |
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* namespace. |
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* @param string $id unique id for item in each class. |
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* |
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* @return string the filename. |
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*/ |
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public function createKey($class, $id) |
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{ |
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return str_replace('\\', '-', $class) . '#' . $id; |
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} |
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/** |
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* Generate a filename for the cached object. |
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* |
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* @param string $key to the cached object. |
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* |
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* @return string the filename. |
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*/ |
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public function filename($key) |
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{ |
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return $this->config['basepath'] . '/' . $key; |
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} |
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/** |
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* Get an item from the cache if available. |
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* |
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* @param string $key to the cached object. |
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* @param boolean $age check the age or not, defaults to |
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* false. |
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* |
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* @return mixed the cached object or false if it has aged |
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* or null if it does not exists. |
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*/ |
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public function get($key, $age = false) |
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{ |
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$file = $this->filename($key); |
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if (is_file($file)) { |
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if ($age) { |
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$age = filemtime($file) + $this->config['age'] > time(); |
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} |
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if (!$age) { |
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// json |
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// text |
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return unserialize(file_get_contents($file)); |
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} |
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return false; |
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} |
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return null; |
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} |
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/** |
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* Put an item to the cache. |
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* |
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* @param string $key to the cached object. |
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* @param mixed $item the object to be cached. |
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* |
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* @throws Exception if failing to write to cache. |
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* |
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* @return void |
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*/ |
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public function put($key, $item) |
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{ |
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$file = $this->filename($key); |
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// json |
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// text |
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if (!file_put_contents($file, serialize($item))) { |
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throw new \Exception( |
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t("Failed writing cache object '!key'.", [ |
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'!key' => $key |
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]) |
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); |
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} |
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} |
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/** |
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* Prune a item from cache. |
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* |
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* @param string $key to the cached object. |
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* |
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* @return void |
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*/ |
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public function prune($key) |
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{ |
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@unlink($this->filename($key)); |
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} |
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/** |
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* Prune all items from cache. |
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* |
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* @return int number of items removed. |
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*/ |
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public function pruneAll() |
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{ |
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$files = glob($this->config['basepath'] . '/*'); |
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$items = count($files); |
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array_map('unlink', $files); |
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return $items; |
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} |
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} |
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canax /
cache
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