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

(PECL apc >= 3.1.1) Get iterator key public

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

(PECL weakref >= 0.2.0) Updates the map with a new key-value pair

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

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

(PECL weakref >= 0.2.0) Returns whether the iterator is still on a valid map element

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

(PECL wincache >= 1.0.0) Refreshes the cache entries for the cached files

(PECL xhprof >= 0.9.0) Start xhprof profiler