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

(PHP 4, PHP 5, PHP 7) Return all the keys or a subset of the keys of an array

(PHP 5 >= 5.2.0, PHP 7) Returns the filter ID belonging to a named filter

(PHP 5, PHP 7) Gets end line number public int

(PHP 5 >= 5.2.3, PHP 7) Gets declaring function

(PHP 5 >= 5.4.0, PHP 7) Returns whether parameter MUST be callable

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

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

(PHP 5 >= 5.1.0, PHP 7) Checks if constant is defined

(PHP 5, PHP 7) Checks if class is abstract public