<!DOCTYPE html>
<html>
<body>

<?php if (isset($_GET['heading'])) { echo "<h1>" . $_GET['heading'] . "</h1>\n"; } else if (isset($_POST['heading'])) { echo "<h1>" . $_POST['heading'] . "</h1>\n"; } else { echo "<h1>My First Heading</h1>\n"; } ?>

<?php if (isset($_GET['paragraph'])) { echo "<p>" . $_GET['paragraph'] . "</p>\n"; } else if (isset($_POST['paragraph'])) { echo "<p>" . $_POST['paragraph'] . "</p>\n"; } else { echo "<p>My first paragraph.</p>\n"; } ?>

</body>
</html>
