* @param string Something which identifies the data - depends on concrete cache
* @param mixed The data to cache - also depends on the concrete cache implementation
* @param array Tags to associate with this cache entry
- * @param integer The lifetime in seconds for this cache entry
+ * @param integer Lifetime of this cache entry in seconds. If NULL is specified, the default lifetime is used. "0" means unlimited liftime.
* @return void
*/
public function set($entryIdentifier, $data, $tags = array(), $lifetime = NULL);
*
* @param string An identifier specifying the cache entry
* @return boolean TRUE if such an entry exists, FALSE if not
+ * @internal
*/
public function remove($entryIdentifier);