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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 |
|---|---|
| 836 | global $wp_query; |
| 837 | if ( is_page() || is_attachment() || $wp_query->is_posts_page ) |
| 838 | $current_page = $wp_query->get_queried_object_id(); |
| 839 | $output .= walk_page_tree($pages, $r['depth'], $current_page, $r); |
| 840 | |
| 841 | if ( $r['title_li'] ) |
| 842 | $output .= '</ul></li>'; |
| 843 | } |
| 844 | |
| 845 | $output = apply_filters('wp_list_pages', $output, $r); |
| 846 | |
| 847 | if ( $r['echo'] ) |
| 848 | echo $output; |
| 849 | else |
| 850 | return $output; |
| 851 | } |
| 852 | |
| 853 | /** |
| 854 | * Display or retrieve list of pages with optional home link. |