public function getSummaryLine()
{
$base = parent::getSummaryLine();
$base .= ": playing time - {$this->playLength}";
return $base;
}
}
class BookProduct extends ShopProduct
{
public $numPages;
public function __construct($title, $firstName, $mainName, $price, $numPages)
{
parent::__construct($title, $firstName, $mainName, $price);
$this->numPages = $numPages;
}
public function getNumberOfPages()
{
return $this->numPages;
}
public function getSummaryLine()
{
$base = parent::getSummaryLine();
$base .= ": page count - {$this->numPages}";
return $base;
}
}
$product1 = new CdProduct("Exile on Coldharbour Lane", "The", "Alabama 3", 10.99, null, 60.33);
print "artist: {$product1->getProducer()}\n";
echo "<hr>";
$product2 = new BookProduct("My Antonia", "Willa", "Cather", 5.75, null, 20.23);
print "artist: {$product2->getProducer()}\n";