WordPress File wp-includes/post-template.php

wp_list_pages()

Retrieves or displays a list of pages (or hierarchical post type items) in list (li) format.

wp_page_menu()

Displays or retrieves a list of pages with an optional home link.

body_class

Filters the list of CSS body class names for the current post or page.

get_the_guid

Filters the Global Unique Identifier (guid) of the post.