From acbc109260a8055d15cc718052bd7122c0df1ded Mon Sep 17 00:00:00 2001
From: Andrew Nacin <nacin@git.wordpress.org>
Date: Thu, 10 Jun 2010 15:28:39 +0000
Subject: [PATCH] Server-side check for an empty menu name on save. props
 ocean90, fixes #13703.

git-svn-id: https://develop.svn.wordpress.org/trunk@15189 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-admin/nav-menus.php | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/wp-admin/nav-menus.php b/wp-admin/nav-menus.php
index 9eb00c5849..6e34070706 100644
--- a/wp-admin/nav-menus.php
+++ b/wp-admin/nav-menus.php
@@ -282,7 +282,7 @@ switch ( $action ) {
 
 		// Add Menu
 		if ( 0 == $nav_menu_selected_id ) {
-			$new_menu_title = esc_html( $_POST['menu-name'] );
+			$new_menu_title = trim( esc_html( $_POST['menu-name'] ) );
 
 			if ( $new_menu_title ) {
 				$_nav_menu_selected_id = wp_update_nav_menu_object( 0, array('menu-name' => $new_menu_title) );
@@ -307,8 +307,14 @@ switch ( $action ) {
 
 			$_menu_object = wp_get_nav_menu_object( $nav_menu_selected_id );
 
+			$menu_title = trim( esc_html( $_POST['menu-name'] ) );
+			if ( ! $menu_title ) {
+				$messages[] = '<div id="message" class="error"><p>' . __('Please enter a valid menu name.') . '</p></div>';
+				$menu_title = $_menu_object->name;
+			}
+
 			if ( ! is_wp_error( $_menu_object ) ) {
-				$_nav_menu_selected_id = wp_update_nav_menu_object( $nav_menu_selected_id, array( 'menu-name' => $_POST['menu-name'] ) );
+				$_nav_menu_selected_id = wp_update_nav_menu_object( $nav_menu_selected_id, array( 'menu-name' => $menu_title ) );
 				if ( is_wp_error( $_nav_menu_selected_id ) ) {
 					$_menu_object = $_nav_menu_selected_id;
 					$messages[] = '<div id="message" class="error"><p>' . $_nav_menu_selected_id->get_error_message() . '</p></div>';