Airplane_Mode_Core::toggle_check PHP Method

        public function toggle_check()
        {
            // Bail if current user doesn't have cap.
            if (!current_user_can('manage_options')) {
                return;
            }
            // Set a sanitized variable of our potential nonce and request.
            $nonce = isset($_GET['airmde_nonce']) ? sanitize_key($_GET['airmde_nonce']) : '';
            $switch = isset($_REQUEST['airplane-mode']) ? sanitize_key($_REQUEST['airplane-mode']) : '';
            // Check for our nonce.
            if (empty($nonce) || !wp_verify_nonce($nonce, 'airmde_nonce')) {
                return;
            }
            // Now check for our query string.
            if (empty($switch) || !in_array($switch, array('on', 'off'))) {
                return;
            }
            // Delete old per-site option.
            delete_option('airplane-mode');
            // Update the setting.
            update_site_option('airplane-mode', sanitize_key($_REQUEST['airplane-mode']));
            // Fire action to allow for functions to run on status change.
            do_action('airplane_mode_status_change', $switch);
            // And go about our business.
            wp_redirect(self::get_redirect());
            exit;
        }