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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 |
---|---|
842 | global $wp_query; |
843 | if ( is_page() || is_attachment() || $wp_query->is_posts_page ) |
844 | $current_page = $wp_query->get_queried_object_id(); |
845 | $output .= walk_page_tree($pages, $r['depth'], $current_page, $r); |
846 |
|
847 | if ( $r['title_li'] ) |
848 | $output .= '</ul></li>'; |
849 | } |
850 |
|
851 | $output = apply_filters('wp_list_pages', $output, $r); |
852 |
|
853 | if ( $r['echo'] ) |
854 | echo $output; |
855 | else |
856 | return $output; |
857 | } |
858 |
|
859 | /** |
860 | * Display or retrieve list of pages with optional home link. |