(PECL apcu >= 5.0.0) Constructs an APCUIterator iterator object

(PECL apc >= 3.1.1) Get iterator key public

(PECL apc >= 3.1.4) Get a binary dump of the given files and user variables

(PECL apc >= 3.1.4) Load a binary dump from a file into the APC file/user cache

(PECL apc >= 3.1.4) Checks if APC key exists

(PECL apc >= 3.1.1) Deletes files from the opcode cache

(PECL apcu >= 5.0.0) Get total cache size

(PECL apc >= 3.1.1) Decrease a stored number

(PECL apcu >= 4.0.0) Fetch a stored variable from the cache

(PECL apc >= 2.0.0) Retrieves cached information from APC's data store