Parent or child (wordpress)

Check if a page is parent or child.

<?php
/**
 * Check if a page is parent or child.
 */
function is_tree($pid) {
    global $post;
    if (is_page() && ($post->post_parent==$pid || is_page($pid))) {
        return true;
    } else {
        return false;
    }
};
?>

functions.php

< toolbox