(PECL apc >= 2.0.0) Clears the APC cache

(PECL apcu >= 5.0.0) Get total cache hits

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

(PECL weakref >= 0.1.0) Releases a previously acquired reference

(PECL wincache >= 1.1.0) Retrieves information about user cache memory usage

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

(PECL bcompiler >= 0.4) Writes the single character \x00 to indicate End of compiled data

(PHP 4, PHP 5, PHP 7) Returns an array with the names of all modules compiled and loaded

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

(PECL runkit >= 0.7.0) Runkit Sandbox Class -- PHP Virtual Machine