<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<?php
function prijs($volwassene,$kinderen = 0){
$prijs = $volwassene * 25 + $kinderen * 10;
return $prijs;
}
echo (prijs(2))
?>
</body>
</html>
Made by Thijs Aarnoudse