class Auto
{
private $aantalDeuren;
public function setAantalDeuren($aantal)
{
$this->aantalDeuren = $aantal;
}
public function getAantalDeuren()
{
return $this->aantalDeuren;
}
}
$kleineAuto = new Auto();
$groteAuto = new Auto();
$kleineAuto->setAantalDeuren(3);
$groteAuto->setAantalDeuren(5);
$groteAuto->setAantalDeuren($kleineAuto->getAantalDeuren() + 2);
?>
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<head>
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<title>Klassen in de praktijk</title>
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