Book-page-126

<?php

class User {

    function __construct(){
        print "In User constructor<br>";
    }

}

class Employee extends User {

    function __construct(){
        parent::__construct();
        print "<br>--In Employee constructor<br>";
    }

}

class Manager extends Employee{
    function __construct(){
        parent::__construct();
        print "--In Manager constructor<br>";
    }
}

$user = new User();

$employee = new Employee();

$manager = new Manager();

?>