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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 |
|---|---|
| 1472 | $nav_menu_option['auto_add'], |
| 1473 | wp_get_nav_menus( array( 'fields' => 'ids' ) ) |
| 1474 | ); |
| 1475 | |
| 1476 | update_option( 'nav_menu_options', $nav_menu_option ); |
| 1477 | |
| 1478 | wp_defer_term_counting( false ); |
| 1479 | |
| 1480 | /** This action is documented in wp-includes/nav-menu.php */ |
| 1481 | do_action( 'wp_update_nav_menu', $nav_menu_selected_id ); |
| 1482 | |
| 1483 | $messages[] = '<div id="message" class="updated notice is-dismissible"><p>' . |
| 1484 | sprintf( |
| 1485 | /* translators: %s: Nav menu title. */ |
| 1486 | __( '%s has been updated.' ), |
| 1487 | '<strong>' . $nav_menu_selected_title . '</strong>' |
| 1488 | ) . '</p></div>'; |
| 1489 | |
| 1490 | unset( $menu_items, $unsorted_menu_items ); |