在主题激活时，以下代码不会使用“新建页面”项创建我的菜单，创建菜单并将位置分配给“子菜单”，但没有我新建页面的菜单项？

我错过了什么？

<?php
if (isset($_GET[\'activated\']) && is_admin()){
    $new_page_title = \'New Page\';
    $new_page_slug = \'/new-page/\';
    $new_page_content = \'This is the page content\';
    $new_page_template = \'page-job-list.php\'; //ex. template-custom.php. Leave blank if you don\'t want a custom page template.
    //don\'t change the code bellow, unless you know what you\'re doing
    $page_check = get_page_by_title($new_page_title);
    $new_page = array(
            \'post_type\' => \'page\',
            \'post_title\' => $new_page_title,
            \'post_content\' => $new_page_content,
        \'post_status\' => \'publish\',
        \'post_author\' => 1,
);
if(!isset($page_check->ID)){
        $new_page_id = wp_insert_post($new_page);
        if(!empty($new_page_template)){
                update_post_meta($new_page_id, \'_wp_page_template\', $new_page_template);
        }
}

// Check if the menu exists
$menu_name = \'AnotherMenu\';
$menu_exists = wp_get_nav_menu_object( $menu_name );

// If it doesn\'t exist, let\'s create it.
if( !$menu_exists){
    $menu_id = wp_create_nav_menu($menu_name);

    wp_update_nav_menu_item($menu_id, $new_page_id, array(
        \'menu-item-title\' =>  __($new_page_title),
        \'menu-item-url\' => home_url( $new_page_slug ), 
        \'menu-item-status\' => \'publish\'));
}

$menulocation = \'submenu\';

if(!has_nav_menu($menulocation) ){
    $locations = get_theme_mod(\'nav_menu_locations\');
    $locations[$menulocation] = $menu_id;  //$foo is term_id of menu
    set_theme_mod(\'nav_menu_locations\', $locations);
}
}