// action function for above hook
function mt_add_pages() {
add_options_page('php_speedy_wp.php', 'PHP Speedy', 0, $this->home_url, array(&$this, 'menu_system'));
}
add_options_page()
, which is responsible for adding the menu item "PHP Speedy" in the list of plug-ins to configure it. The 3rd parameter of this function indicates the user level (from 0 to 10) to which the plug-in settings will be available. And for some reason, this parameter is 0, instead of 10. This means that any registered user of your blog will see this item in the console in the menu, and, of course, will be able to configure the plugin as it pleases or even deactivate it.
Source: https://habr.com/ru/post/118369/