(PHP 4, PHP 5, PHP 7) Gets PHP script owner's UID

(PECL wincache >= 1.1.0) Deletes variables from the user cache

(PECL uopz >= 1.0.0) Creates a function at runtime

(PECL bcompiler >= 0.4) Reads and creates classes from a bz compressed file

(PECL weakref >= 0.2.0) Counts the number of live entries in the map

(PHP 5 >= 5.5.0, PHP 7, PECL ZendOpcache >= 7.0.0) Invalidates a cached script

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

(PECL apc >= 3.0.13) Stores a file in the bytecode cache, bypassing all filters.

(PHP 5 >= 5.3.0, PHP 7) Returns status of the circular reference collector

(PECL wincache >= 1.1.0) Releases an exclusive lock on a given key