我正在尝试为插件创建一个简单的菜单布局。这是我第一次尝试创建插件，很抱歉这里可能有一个明显的错误。这是我必须创建菜单的代码

    add_action( \'admin_menu\', \'register_menu_page\' );
    add_action( \'admin_menu\', \'register_submenu_page\' );

function register_menu_page()
    {
    add_menu_page( \'Broughton Admin\', \'Broughton Admin\', \'manage_options\', \'broughton-admin-page\', \'broughton_admin_page\' ); 
    }

function register_submenu_page() {
    add_submenu_page( \'broughton-admin-page\', \'Upload XML\', \'Upload XML\', \'manage_options\', \'upload-xml-page\', \'upload_xml_page\' ); 
    add_submenu_page( \'broughton-admin-page\', \'Archive XML\', \'Archive XML\', \'manage_options\', \'archive-xml-page\', \'archive_xml_page\' );

function broughton_admin_page()
    {
        echo \'<p>Menu Page</p>\';
    }

function upload_xml_page() 
    {
    echo \'<p>Upload submenu page</p>\';
    }

function archive_xml_page()
    {
    echo \'<p>Archive subment page</p>\';
    }

代码不起作用，我只是在尝试以管理员身份登录时出现了一个白色屏幕。错误日志含糊不清地报告：“语法错误，文件意外结束”。有人能看到这里的问题吗？

function register_submenu_page() {
  add_submenu_page( \'broughton-admin-page\', \'Upload XML\', \'Upload XML\',        \'manage_options\', \'upload-xml-page\', \'upload_xml_page\' ); 
  add_submenu_page( \'broughton-admin-page\', \'Archive XML\', \'Archive XML\', \'manage_options\', \'archive-xml-page\', \'archive_xml_page\' );
}