(PECL apc >= 3.0.0) Removes a stored variable from the cache

(PECL apc >= 3.1.1) Increase a stored number

(PECL apc >= 3.0.0) Cache a variable in the data store

(PHP 5, PHP 7 >= 5.5.0, PHP 7) Sets the process title

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Gets the current include_path configuration option

(PECL apcu >= 4.0.0) Cache a variable in the data store

(PHP 4, PHP 5, PHP 7) Gets the version of the current Zend engine

(PECL apc >= 3.1.1) Get current item public

(PHP 4, PHP 5, PHP 7) Sets the value of a configuration option

(PECL weakref >= 0.1.0) Checks whether the object referenced still exists