(PECL runkit >= 0.7.0) Return numerically indexed array of registered superglobals

(PECL apcu >= 4.0.0) Checks if entry exists

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

(PECL uopz >= 1.0.0) Extend a class at runtime

(PECL apd >= 0.2) Stops the interpreter and waits on a CR from the socket

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

(PECL uopz >= 1.0.4) Copy a function Closure

(PHP 5 >= 5.3.0, PHP 7) Deactivates the circular reference collector

(PHP 5 >= 5.2.4, PHP 7) Retrieve a path to the loaded php.ini file

(PECL apcu >= 5.0.0) Checks if current position is valid