getCapabilities (line 124)

Return an associative array of capabilities (booleans) of the backend

The array must include these keys :

• automatic_cleaning (is automating cleaning necessary)
• tags (are tags supported)
• expired_read (is it possible to read expired cache records (for doNotTestCacheValidity option for example))
• priority does the backend deal with priority when saving
• infinite_lifetime (is infinite lifetime can work with this backend)
• get_list (is it possible to get the list of cache ids and the complete list of tags)

• return: associative of with capabilities
• access: public

getIds (line 42)

Return an array of stored cache ids

• return: array of stored cache ids (string)
• access: public

getIdsMatchingTags (line 59)

Return an array of stored cache ids which match given tags

In case of multiple tags, a logical AND is made between tags

• return: array of matching cache ids (string)
• access: public

• array $tags: array of tags

getMetadatas (line 99)

Return an array of metadatas for the given cache id

The array must include these keys :

• expire : the expire timestamp
• tags : a string array of tags
• mtime : timestamp of last modification time

• return: array of metadatas (false if the cache id is not found)
• access: public

• string $id: cache id

touch (line 108)

Give (if possible) an extra lifetime to the given cache id

• return: true if ok
• access: public

• string $id: cache id
• int $extraLifetime