php return username of currently viewed author profile
On an author archive page (assuming the plugin uses the core archives) get_queried_object() will return the WP_User object for the author. Something like: $author = get_queried_object(); if (is_a($author, ‘WP_User’)) { var_dump($author->data); } You should see the login, nicename, and display name in there. Use what you need.