What should I do if a WordPress custom theme has a fatal error? Add code to solve it

Test replacement on local computerWordPresstheme, when trying to customize the theme, I get the following fatal error ▼

Fatal error with WordPress custom theme?

If you encounter a fatal error similar to the following when opening a WordPress custom theme and background menu:

Fatal error: Uncaught exception 'Exception' with message 'Supplied nav_menu_item value missing property: description' in D:\xampp\htdocs\wp\ceshimuban\wp-includes\customize\class-wp-customize-nav-menu-item-setting.php:183 Stack trace: #0 D:\xampp\htdocs\wp\ceshimuban\wp-includes\class-wp-customize-nav-menus.php(820): WP_Customize_Nav_Menu_Item_Setting->__construct(Object(WP_Customize_Manager), 'nav_menu_item[1...', Array) #1 [internal function]: WP_Customize_Nav_Menus->customize_register(Object(WP_Customize_Manager)) #2 D:\xampp\htdocs\wp\ceshimuban\wp-includes\class-wp-hook.php(303): call_user_func_array(Array, Array) #3 D:\xampp\htdocs\wp\ceshimuban\wp-includes\class-wp-hook.php(327): WP_Hook->apply_filters('', Array) #4 D:\xampp\htdocs\wp\ceshimuban\wp-includes\plugin.php(470): WP_Hook->do_action(Array) #5 D:\xampp\htdocs\wp\ceshimuban\wp-includes\class-wp-customize-manager.php(933): do_action('customize_regis...', Object(WP_Customize_Manager)) #6 [internal function]: WP_Customize_Manager->wp_loaded('') #7 D:\xampp\htd in D:\xampp\htdocs\wp\ceshimuban\wp-includes\customize\class-wp-customize-nav-menu-item-setting.php on line 183
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How to fix Supply nav_menu_item value missing property: description'?

We can do this in WordPress themesfunction.phpfile, add the following code to fix it:

/**
* 解决WordPress自定义主题时出现致命错误 By 陈沩亮博客
* https://www.chenweiliang.com/cwl-19302.html
**/
add_filter('wp_get_nav_menu_items', 'my_wp_get_nav_menu_items', 10, 3);
function my_wp_get_nav_menu_items($items, $menu, $args) {
foreach($items as $key => $item)
$items[$key]->description = '';

return $items;
}

Chen WeiliangTested, WordPress themesfunction.phpIn the file, after adding the above code, it can solve the problem of WordPress Fatal error: Uncaught exception 'Exception' with message 'Supplied nav_menu_item value missing property: description'.