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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 |
|---|---|
| 578 | |
| 579 | } else { |
| 580 | $menu_item->type_label = __('Custom'); |
| 581 | $menu_item->title = $menu_item->post_title; |
| 582 | $menu_item->url = empty( $menu_item->url ) ? get_post_meta( $menu_item->ID, '_menu_item_url', true ) : $menu_item->url; |
| 583 | } |
| 584 | |
| 585 | $menu_item->target = empty( $menu_item->target ) ? get_post_meta( $menu_item->ID, '_menu_item_target', true ) : $menu_item->target; |
| 586 | |
| 587 | $menu_item->attr_title = empty( $menu_item->attr_title ) ? apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ) : $menu_item->attr_title; |
| 588 | $menu_item->description = empty( $menu_item->description ) ? apply_filters( 'nav_menu_description', $menu_item->post_content ) : $menu_item->description; |
| 589 | |
| 590 | $menu_item->classes = empty( $menu_item->classes ) ? (array) get_post_meta( $menu_item->ID, '_menu_item_classes', true ) : $menu_item->classes; |
| 591 | $menu_item->xfn = empty( $menu_item->xfn ) ? get_post_meta( $menu_item->ID, '_menu_item_xfn', true ) : $menu_item->xfn; |
| 592 | } else { |
| 593 | $menu_item->db_id = 0; |
| 594 | $menu_item->menu_item_parent = 0; |
| 595 | $menu_item->object_id = (int) $menu_item->ID; |
| 596 | $menu_item->type = 'post_type'; |
| 597 | |
| 598 | $object = get_post_type_object( $menu_item->post_type ); |
| 599 | $menu_item->object = $object->name; |
| 600 | $menu_item->type_label = $object->labels->singular_name; |
| 601 | |
| 602 | $menu_item->title = $menu_item->post_title; |
| 603 | $menu_item->url = get_permalink( $menu_item->ID ); |
| 604 | $menu_item->target = ''; |
| 605 | |
| 606 | $menu_item->attr_title = apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ); |
| 607 | $menu_item->description = apply_filters( 'nav_menu_description', $menu_item->post_content ); |
| 608 | $menu_item->classes = array(); |
| 609 | $menu_item->xfn = ''; |
| 610 | } |
| 611 | } elseif ( isset( $menu_item->taxonomy ) ) { |
| 612 | $menu_item->ID = $menu_item->term_id; |
| 613 | $menu_item->db_id = 0; |
| 614 | $menu_item->menu_item_parent = 0; |
| 615 | $menu_item->object_id = (int) $menu_item->term_id; |