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

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

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

(PHP 5, PHP 7) Attempt to load undefined class

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