和前面的问题一样，如果你调用了任何类方法来引用该类，请回答。所以你需要更换这条线

$theme_options = $mafongroup_menu_page_creation_method( $page_title, $menu_title, $capability, $menu_slug, $function,\'dashicons-image-filter\', \'2.111111\');

$theme_options = $mafongroup_menu_page_creation_method( $page_title, $menu_title, $capability, $menu_slug, array( $this, $function ),\'dashicons-image-filter\', \'2.111111\');

class mafongroup_admin {

    public function __construct() {
        add_action( \'admin_menu\', array( $this, \'mafongroup_admin_menu\' ) );
        add_action( \'admin_init\', array( $this, \'mafongroup_admin_menu_function\' ));
    }

    public function mafongroup_admin_menu(){
        if ( current_user_can( \'edit_theme_options\' ) ){
            $page_title="MAFON GROUP";
            $menu_title="MAFON GROUP";
            $capability="administrator";
            $menu_slug="mafongroup_admin_settings";
            $function="mafongroup_admin_menu_function";

            $mafongroup_menu_page_creation_method    = \'add_menu_page\';
            $mafongroup_submenu_page_creation_method = \'add_submenu_page\';

            $theme_options = $mafongroup_menu_page_creation_method( $page_title, $menu_title, $capability, $menu_slug, array( $this, $function ),\'dashicons-image-filter\', \'2.111111\');
        }
    }

    public function mafongroup_admin_menu_function(){
        echo \'do something\';
    }
}

new mafongroup_admin();