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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 |
|---|---|
| 761 | global $wp_query; |
| 762 | if ( is_page() || is_attachment() || $wp_query->is_posts_page ) |
| 763 | $current_page = $wp_query->get_queried_object_id(); |
| 764 | $output .= walk_page_tree($pages, $r['depth'], $current_page, $r); |
| 765 | |
| 766 | if ( $r['title_li'] ) |
| 767 | $output .= '</ul></li>'; |
| 768 | } |
| 769 | |
| 770 | $output = apply_filters('wp_list_pages', $output, $r); |
| 771 | |
| 772 | if ( $r['echo'] ) |
| 773 | echo $output; |
| 774 | else |
| 775 | return $output; |
| 776 | } |
| 777 | |
| 778 | /** |
| 779 | * Display or retrieve list of pages with optional home link. |