<!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
for($x = 20; $x >= 2; $x-=2){
echo "Het kwadraat van $x is " . ($x * $x) . "<br>";
}
?>
</body>
</html>
Made by Thijs Aarnoudse