At first glance it works and I cannot see any implications but maybe you are aware of some? You say that you are not getting errors, which I would have expected but it looks as though WordPress uses require_once() so you are probably safe: 39 /** WordPress Plugin Administration API */ 40 require_once(ABSPATH . ‘wp-admin/includes/plugin.php’); … Read more
plugins_loaded fires once activated plugins have loaded. This fires on both admin and public screens. admin_init fires as an admin screen or script is being initialized. This fires only on admin screens. The typical order for firing of hooks on the admin screen is: muplugins_loaded – this is the first hook available to must-use plugins … Read more
In general: Yes, wait for a dedicated hook to start your own code. Never just throw an object instance into the global namespace. But init is rarely necessary. You hook in as late as possible. If your first code runs on wp_head do not use an earlier hook. You can even cascade hooks: add_action( ‘wp_head’, … Read more
add_menu_page and add_submenu_page both return the page’s “hook suffix”, which can be used to identify the page with certain hooks. As such, you can use that suffix in combination with the variable hooks admin_print_styles-{$hook_suffix} and admin_print_scripts-{$hook_suffix} to specifically target these pages. function my_menu() { $menu = add_menu_page( ‘Page 1’, ‘bar’, ‘something’, ‘else’, ‘foo’ ); $submenu … Read more