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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 |
|---|---|
| 952 | $menu_item->target = ! isset( $menu_item->target ) ? get_post_meta( $menu_item->ID, '_menu_item_target', true ) : $menu_item->target; |
| 953 | |
| 954 | /** |
| 955 | * Filters a navigation menu item's title attribute. |
| 956 | * |
| 957 | * @since 3.0.0 |
| 958 | * |
| 959 | * @param string $item_title The menu item title attribute. |
| 960 | */ |
| 961 | $menu_item->attr_title = ! isset( $menu_item->attr_title ) ? apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ) : $menu_item->attr_title; |
| 962 | |
| 963 | if ( ! isset( $menu_item->description ) ) { |
| 964 | /** |
| 965 | * Filters a navigation menu item's description. |
| 966 | * |
| 967 | * @since 3.0.0 |
| 968 | * |
| 969 | * @param string $description The menu item description. |
| 970 | */ |
| Line | Code |
| 987 | /* translators: %d: ID of a post. */ |
| 988 | $menu_item->post_title = sprintf( __( '#%d (no title)' ), $menu_item->ID ); |
| 989 | } |
| 990 | |
| 991 | $menu_item->title = $menu_item->post_title; |
| 992 | $menu_item->url = get_permalink( $menu_item->ID ); |
| 993 | $menu_item->target = ''; |
| 994 | |
| 995 | /** This filter is documented in wp-includes/nav-menu.php */ |
| 996 | $menu_item->attr_title = apply_filters( 'nav_menu_attr_title', '' ); |
| 997 | |
| 998 | /** This filter is documented in wp-includes/nav-menu.php */ |
| 999 | $menu_item->description = apply_filters( 'nav_menu_description', '' ); |
| 1000 | $menu_item->classes = array(); |
| 1001 | $menu_item->xfn = ''; |
| 1002 | } |
| 1003 | } elseif ( isset( $menu_item->taxonomy ) ) { |
| 1004 | $menu_item->ID = $menu_item->term_id; |
| 1005 | $menu_item->db_id = 0; |