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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 609 | |
| 610 | } else { |
| 611 | $menu_item->type_label = __('Custom'); |
| 612 | $menu_item->title = $menu_item->post_title; |
| 613 | $menu_item->url = empty( $menu_item->url ) ? get_post_meta( $menu_item->ID, '_menu_item_url', true ) : $menu_item->url; |
| 614 | } |
| 615 | |
| 616 | $menu_item->target = empty( $menu_item->target ) ? get_post_meta( $menu_item->ID, '_menu_item_target', true ) : $menu_item->target; |
| 617 | |
| 618 | $menu_item->attr_title = empty( $menu_item->attr_title ) ? apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ) : $menu_item->attr_title; |
| 619 | $menu_item->description = empty( $menu_item->description ) ? apply_filters( 'nav_menu_description', $menu_item->post_content ) : $menu_item->description; |
| 620 | |
| 621 | $menu_item->classes = empty( $menu_item->classes ) ? (array) get_post_meta( $menu_item->ID, '_menu_item_classes', true ) : $menu_item->classes; |
| 622 | $menu_item->xfn = empty( $menu_item->xfn ) ? get_post_meta( $menu_item->ID, '_menu_item_xfn', true ) : $menu_item->xfn; |
| 623 | } else { |
| 624 | $menu_item->db_id = 0; |
| 625 | $menu_item->menu_item_parent = 0; |
| 626 | $menu_item->object_id = (int) $menu_item->ID; |
| 627 | $menu_item->type = 'post_type'; |
| 628 | |
| 629 | $object = get_post_type_object( $menu_item->post_type ); |
| 630 | $menu_item->object = $object->name; |
| 631 | $menu_item->type_label = $object->labels->singular_name; |
| 632 | |
| 633 | $menu_item->title = $menu_item->post_title; |
| 634 | $menu_item->url = get_permalink( $menu_item->ID ); |
| 635 | $menu_item->target = ''; |
| 636 | |
| 637 | $menu_item->attr_title = apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ); |
| 638 | $menu_item->description = apply_filters( 'nav_menu_description', $menu_item->post_content ); |
| 639 | $menu_item->classes = array(); |
| 640 | $menu_item->xfn = ''; |
| 641 | } |
| 642 | } elseif ( isset( $menu_item->taxonomy ) ) { |
| 643 | $menu_item->ID = $menu_item->term_id; |
| 644 | $menu_item->db_id = 0; |
| 645 | $menu_item->menu_item_parent = 0; |
| 646 | $menu_item->object_id = (int) $menu_item->term_id; |