Wordpress Error Handling when no menu location assigned -

my menu code

<h6><?php      $theme_location = 'footer-customers';     $theme_locations = get_nav_menu_locations();     $menu_obj = get_term( $theme_locations[$theme_location], 'nav_menu' );                             echo $menu_obj->name; ?></h6>     <?php       $footer_02 = wp_nav_menu( array('theme_location' => 'footer-business' ,                                                         'container' => '',                                                         'echo' => false,                                                         'fallback_cb' => '__return_false')                                              );      if ( ! empty ( $footer_02) )     {          echo $footer_02;     }        ?> 

may know how check if there no menu assigned theme_location in backend setting(/wp-admin)?

the error msg follow:

how make title become empty or show nothing if menu not set or assign

judging error i'm guessing line 78 echoing of $menu_obj->name?

if can following:

<h6><?php      $theme_location = 'footer-customers';     $theme_locations = get_nav_menu_locations();     $menu_obj = get_term( $theme_locations[$theme_location], 'nav_menu' );      // check whether name property exists - return true if property      // defined empty     $bhavename = property_exists ( $menu_obj , 'name' );      // check both true , has length before accessing     if($bhavename == true && strlen($menu_obj->name) > 0) {         echo $menu_obj->name;     } ?></h6>   

reference: php manual