How to include a plugin’s php file to another plugin functions file [duplicate]
The first error message means that there is restrictions in place on where you can include files from, set by the server. You could try with require_once ABSPATH . ‘/wp-content/plugins/pluginname/pluginfunctions.php’; but I’m not sure if it would work. With the second include you’re trying to include an URL which is disabled by the server for … Read more