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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. |