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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 |
|---|---|
| 1039 | unset( $nav_menu_option['auto_add'][$key] ); |
| 1040 | } |
| 1041 | // Remove nonexistent/deleted menus |
| 1042 | $nav_menu_option['auto_add'] = array_intersect( $nav_menu_option['auto_add'], wp_get_nav_menus( array( 'fields' => 'ids' ) ) ); |
| 1043 | update_option( 'nav_menu_options', $nav_menu_option ); |
| 1044 | |
| 1045 | wp_defer_term_counting( false ); |
| 1046 | |
| 1047 | /** This action is documented in wp-includes/nav-menu.php */ |
| 1048 | do_action( 'wp_update_nav_menu', $nav_menu_selected_id ); |
| 1049 | |
| 1050 | $messages[] = '<div id="message" class="updated notice is-dismissible"><p>' . |
| 1051 | /* translators: %s: nav menu title */ |
| 1052 | sprintf( __( '%s has been updated.' ), |
| 1053 | '<strong>' . $nav_menu_selected_title . '</strong>' |
| 1054 | ) . '</p></div>'; |
| 1055 | |
| 1056 | unset( $menu_items, $unsorted_menu_items ); |
| 1057 | |