<?php
session_start();
?>
<!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 style="background-color: <?php echo $_COOKIE["color"]?>;">
<form action="index.php" method="POST">
<input type="hidden" name="logout" value="1">
<button type="submit">
Kijelentkezés
</button>
</form>
</body>
</html>