(PHP 4, PHP 5, PHP 7) Get the default properties of the class

(PHP 4, PHP 5, PHP 7) Gets the class methods' names

(PHP 4, PHP 5, PHP 7) Checks if the class has been defined

(PHP 5 >= 5.4.0, PHP 7) Checks if the trait exists

(PHP 4, PHP 5, PHP 7) Returns an array with the name of the defined classes

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Checks if the object is of this class or has this class as one of its parents

(PHP 5 >= 5.3.0, PHP 7) the "Late Static Binding" class name

(PHP 4 >= 4.0.5, PHP 5) Call a user method given with an array of parameters

(PHP 4, PHP 5) Call a user method on an specific object

(PHP 5 >= 5.4.0, PHP 7) Returns an array of all declared traits