(PECL apc >= 3.0.0) Fetch a stored variable from the cache
(PECL apc >= 3.1.4) Load a binary dump from a file into the APC file/user cache
(PECL apc >= 3.1.1) Deletes files from the opcode cache
(PECL apc >= 3.1.4) Checks if APC key exists
(PECL apc >= 3.1.1) Decrease a stored number
(PECL apcu >= 4.0.0) Fetch a stored variable from the cache
(PECL apcu >= 4.0.0) Checks if entry exists
(PECL apcu >= 4.0.0) Decrease a stored number
(PECL apc >= 2.0.0) Retrieves cached information from APC's data store
(PECL apcu >= 4.0.0) Increase a stored number
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