(PECL runkit >= 0.7.0) Remove/Delete an already defined constant

(PECL weakref >= 0.1.0) Acquires a strong reference on that object

(PHP 4, PHP 5, PHP 7) Gets PHP's process ID int

(PECL bcompiler >= 0.3) Writes the bcompiler header

(PECL runkit >= 0.7.0) Specify a function to capture and/or process output from a runkit sandbox

(PECL apcu >= 4.0.0) Retrieves APCu Shared Memory Allocation information

(PECL runkit >= 0.7.0) Dynamically changes the code of the given method

(PECL runkit >= 0.7.0) Dynamically adds a new method to a given class

(PHP 4, PHP 5, PHP 7) Gets the current resource usages

(PECL runkit >= 0.7.0) Change a function's name