Falcon_Admin::handle_save_on_network PHP Method

    public static function handle_save_on_network()
    {
        if (!Falcon::is_network_mode()) {
            return;
        }
        if (empty($_POST) || empty($_REQUEST['action']) || $_REQUEST['action'] !== 'update') {
            return;
        }
        $option_page = 'bbsub_options';
        $capability = apply_filters("option_page_capability_{$option_page}", 'manage_network_options');
        if (!current_user_can($capability)) {
            wp_die(__('Cheatin’ uh?'), 403);
        }
        check_admin_referer($option_page . '-options');
        $whitelist_options = apply_filters('whitelist_options', array());
        if (!isset($whitelist_options[$option_page])) {
            wp_die(__('<strong>ERROR</strong>: options page not found.'));
        }
        $options = $whitelist_options[$option_page];
        foreach ($options as $option) {
            if ($unregistered) {
                _deprecated_argument('options.php', '2.7', sprintf(__('The <code>%1$s</code> setting is unregistered. Unregistered settings are deprecated. See http://codex.wordpress.org/Settings_API'), $option, $option_page));
            }
            $option = trim($option);
            $value = null;
            if (isset($_POST[$option])) {
                $value = $_POST[$option];
                if (!is_array($value)) {
                    $value = trim($value);
                }
                $value = wp_unslash($value);
            }
            update_site_option($option, $value);
        }
        /**
         * Handle settings errors and return to options page
         */
        // If no settings errors were registered add a general 'updated' message.
        if (!count(get_settings_errors())) {
            add_settings_error('general', 'settings_updated', __('Settings saved.'), 'updated');
        }
        set_transient('settings_errors', get_settings_errors(), 30);
        /**
         * Redirect back to the settings page that was submitted
         */
        $goback = add_query_arg('settings-updated', 'true', wp_get_referer());
        wp_redirect($goback);
        exit;
    }