{ $this->price = $par; } function getPrice() { echo $this->price . "<br/>"; } function setTitle($par) { $this->title = $par; } function getTitle() { echo $this->title . " <br/>"; } } $physics = new Books(); $maths = new Books(); $chemistry = new Books(); $physics->setTitle("Physics for High School"); $chemistry->setTitle("Advanced Chemistry"); $maths->setTitle("Algebra"); $physics->setPrice(10); $chemistry->setPrice(15); $maths->setPrice(7); $physics->getTitle(); $chemistry->getTitle(); $maths->getTitle(); $physics->getPrice(); $chemistry->getPrice(); $maths->getPrice();