php code problem

Hello, I have this code to show something if it’s a Page or a Subpage, this works well

<?php
// Get $post if you're inside a function
global $post;

if ( is_page() && $post->post_parent ) {
// This is a subpage

echo ('subpage');

} else {
// This is not a subpage
echo 'page';
}
?>

The problem I got is that I can’t show this:
<a href="<?php echo $parent_permalink; ?>"><h2 class="titleh2" title="<?php echo $parent_title; ?>"><?php the_title(); ?></h2></a>
instead of this:
echo ('subpage');

Any Idea how to do that?

PS: of course, this is inside the loop