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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 623 | global $wp_query; |
| 624 | if ( is_page() || $wp_query->is_posts_page ) |
| 625 | $current_page = $wp_query->get_queried_object_id(); |
| 626 | $output .= walk_page_tree($pages, $r['depth'], $current_page, $r); |
| 627 | |
| 628 | if ( $r['title_li'] ) |
| 629 | $output .= '</ul></li>'; |
| 630 | } |
| 631 | |
| 632 | $output = apply_filters('wp_list_pages', $output); |
| 633 | |
| 634 | if ( $r['echo'] ) |
| 635 | echo $output; |
| 636 | else |
| 637 | return $output; |
| 638 | } |
| 639 | |
| 640 | /** |
| 641 | * Display or retrieve list of pages with optional home link. |