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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 |
|---|---|
| 1215 | } |
| 1216 | } |
| 1217 | // Remove non-existent/deleted menus. |
| 1218 | $nav_menu_option['auto_add'] = array_intersect( $nav_menu_option['auto_add'], wp_get_nav_menus( array( 'fields' => 'ids' ) ) ); |
| 1219 | update_option( 'nav_menu_options', $nav_menu_option ); |
| 1220 | |
| 1221 | wp_defer_term_counting( false ); |
| 1222 | |
| 1223 | /** This action is documented in wp-includes/nav-menu.php */ |
| 1224 | do_action( 'wp_update_nav_menu', $nav_menu_selected_id ); |
| 1225 | |
| 1226 | $messages[] = '<div id="message" class="updated notice is-dismissible"><p>' . |
| 1227 | sprintf( |
| 1228 | /* translators: %s: Nav menu title. */ |
| 1229 | __( '%s has been updated.' ), |
| 1230 | '<strong>' . $nav_menu_selected_title . '</strong>' |
| 1231 | ) . '</p></div>'; |
| 1232 | |
| 1233 | unset( $menu_items, $unsorted_menu_items ); |