<?php class Person { private $name; private $age; private $id; function __construct( $name, $age ) { $this->name = $name; $this->age = $age; } function setId( $id ) { $this->id = $id; } function getId(){ echo "get id method"; } function __clone() { $this->id = 0; } } var_dump( new Person("A",10) ); ?>