如何删除admin以下用户的admin菜单项和Disable访问？正确的方式。。。

// 1 - Remove Menu Items
function my_remove_menu_pages() {
    if ( !current_user_can( \'administrator\' ) ) {
        remove_menu_page(\'options-general.php\'); // Settings
        remove_menu_page(\'tools.php\'); // Tools
        remove_menu_page(\'upload.php\'); // Media
        remove_menu_page(\'plugins.php\');
        remove_menu_page(\'themes.php\');
        remove_menu_page(\'edit-comments.php\');
        remove_menu_page(\'edit.php?post_type=page\');
        remove_menu_page(\'link-manager.php\');
    }
}
add_action( \'admin_init\', \'my_remove_menu_pages\' );

// 2 - Redirect users if they visit links from non visible menu items
function no_permission_admin_redirect() {
    if ( !current_user_can( \'administrator\' ) ) {
        if (stripos($_SERVER[\'REQUEST_URI\'],\'tools.php\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'options-general.php\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'upload.php\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'media.php\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'edit-comments.php\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'post-new.php?post_type=page\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'post-new.php\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'media-new.php\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'edit.php?post_type=page\') !== false 
            || stripos($_SERVER[\'REQUEST_URI\'],\'link-manager.php\') !== false) { 
            wp_redirect(get_option(\'siteurl\') . \'/wp-admin/index.php?permissions_error=true\'); 
        }
    }
}
add_action(\'admin_menu\',\'no_permissions_admin_redirect\');


// 3 - Show error message to users if they visit links from non visible menu items
function no_permissions_admin_notice() { 
        echo "<div id=\'permissions-warning\' class=\'error fade\'><p><strong>".__(\'You do not have permission to access that page.\')."</strong></p></div>";
    }

function no_permissions_show_notice() {
        if($_GET[\'permissions_error\']) {
            add_action(\'admin_notices\', \'no_permissions_admin_notice\');
        }
    }
add_action(\'admin_init\',\'no_permissions_show_notice\');

这段代码可以工作，但不幸的是，用户可以通过在浏览器上键入url来访问某些页面，而不会出现任何错误或重定向。

如果用户在浏览器上键入url而不使用插件访问页面，是否有一种简单的方法可以删除菜单项并将用户重定向到仪表板？