Untitled

function redirect_on_plugin_activation($plugin) {
    if($plugin == plugin_basename(__FILE__)) {
        if(is_plugin_active_for_network('bt-bb-ab/bt-bb-ab.php')) {
            wp_redirect(network_admin_url('admin.php?page=bt_bb_ab_test&wizard=1'));
        } else {
            wp_redirect(admin_url('options-general.php?page=bt_bb_ab_test&wizard=1'));
        }
        exit;
    }
}