(PECL wincache >= 1.1.0) Deletes entire content of the user cache

(PHP 4, PHP 5, PHP 7) Gets the name of the owner of the current PHP script

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

(PHP 4, PHP 5, PHP 7) Sets the value of an environment variable

(PECL apd 0.2-0.4) Returns the current call stack as an array

(PHP 4, PHP 5, PHP 7) Outputs information about PHP's configuration

(PECL wincache >= 1.0.0) Retrieves information about files cached in the opcode cache

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

(PECL runkit >= 0.7.0) Check the PHP syntax of the specified php code

(PECL bcompiler >= 0.3) Writes the bcompiler header