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Introduction

These functions allow you to obtain information about classes and instance objects. You can obtain the name of the class to which an object belongs, as well as its member properties and methods. Using these functions, you can find out not only the class membership of an object, but also its parentage (i.e. what class is the object class extending).

Please see the Objects section of the manual for a detailed explanation of how classes and objects are implemented and used in PHP.

PHP Manual