(PHP 5, PHP 7) Checks if iterateable public bool

(PHP 5, PHP 7) Checks if the class is an interface

(PHP >= 5.4.0) Creates a new class instance without invoking the constructor.

(PHP 5, PHP 7) Gets defined constant public mixed

(PHP 5, PHP 7) Gets static properties public

(PHP 5, PHP 7) Checks if class is defined internally by an extension, or the core

(PHP >= 5.4.0) Returns whether this is a trait

(PHP 5, PHP 7) Gets default properties public

(PHP 5, PHP 7) Gets the filename of the file in which the class has been defined

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