(PHP 4, PHP 5, PHP 7) Register a function for execution on shutdown

(PHP 4 >= 4.0.3, PHP 5, PHP 7) Register a function for execution on each tick

(PHP 4, PHP 5, PHP 7) Returns an array comprising a function's argument list

(PHP 4, PHP 5, PHP 7) Return an item from the argument list

(PHP 4, PHP 5, PHP 7) Call the callback given by the first parameter

(PHP 4, PHP 5, PHP 7) Returns the number of arguments passed to the function

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Call a callback with an array of parameters

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Returns an array of all defined functions

(PHP 5 >= 5.3.0, PHP 7) Call a static method

(PHP 4 >= 4.0.3, PHP 5, PHP 7) De-register a function for execution on each tick