<?php class Products{ // Properties protected $_title; // Methods public function __construct($title){ $this->_title = $title; } public function getTitle(){ return $this->_title; } } class Order extends Products{ } class OrderDomestic extends Products{ } class OrderInternational extends Products{ public function __construct($title){ parent::__construct($title); } } $OI = new OrderInternational('DVD Blue'); echo $OI->getTitle(); // DVD Blue class OrderInternationalFunky extends OrderInternational{ public function __construct($title){ parent::__construct($title); } } $OI = new OrderInternationalFunky('DVD Red'); echo $OI->getTitle(); // DVD Red class OrderInternationalDoubleFunky extends OrderInternationalFunky{ public function __construct($title){ parent::__construct($title); } } $OI = new OrderInternationalDoubleFunky('DVD Green'); echo $OI->getTitle(); // DVD Green
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