If page parent equals ID (number)?

Question

I have an if statement that is checking the ID of the page, using the following:

<?php if ( is_page(10) ) { ?>

How can I do something like if page parent is 10?

Answer 1

try something like this

global $post;

if ($post->post_parent == 10) {
   echo "parent's id is 10";
}

Answer 2

$id = wp_get_post_parent_id( get_the_id() );

Now $id has parent page id