(PECL wincache >= 1.1.0) Adds a variable in user cache and overwrites a variable if it already exists in

(PECL weakref >= 0.2.0) Removes an entry from the map

(PECL apc >= 3.0.0) Defines a set of constants for retrieval and mass-definition

(PECL weakref >= 0.2.0) Returns the current key under iteration.

(PHP 4, PHP 5, PHP 7) Limits the maximum execution time

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

(PHP 4, PHP 5, PHP 7) Alias of

(PECL apcu >= 5.0.0) Get current item public

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

(PHP 5 >= 5.5.5, PHP 7, PECL ZendOpcache > 7.0.2) Compiles and caches a PHP script without executing it