Display parent page only on sub-page wordpress

Question

I want to display parent page only on sub-pages. I am using this code but it display parent page on every page.

 <?php
$parent_title = get_the_title($post->post_parent);
echo $parent_title;
?>

Answer 1

you can try this

<?php 
if($post->post_parent>0)
{
$parent_title = get_the_title($post->post_parent);
echo $parent_title;
}
?>