(PHP 5, PHP 7) Invokes function public mixed

(PHP 5 >= 5.1.0, PHP 7) Invokes function args

(PHP 5, PHP 7) Checks if function is disabled

(PHP 5, PHP 7) Exports function public static

(PHP 5, PHP 7) Constructs a ReflectionFunction object

(PHP >= 5.4.0) Returns a dynamically created closure for the function

(PHP 5, PHP 7) To string public string Refle