Title: Undefined $extra_url
Last modified: August 30, 2016

---

# Undefined $extra_url

 *  Resolved [alexherrera](https://wordpress.org/support/users/alexherrera/)
 * (@alexherrera)
 * [10 years, 8 months ago](https://wordpress.org/support/topic/undefined-extra_url/)
 * Hi I’m testing the plugin to see if is going to work for my project and buy the
   pro version, so far it’s been perfect, I just have one problem.
    Im testing the
   paypal functionality with a sandbox but after the payment is done, and try to
   redirect I got this error: Undefined index: extra_url …. on booking-system/addons/
   paypal/dopbsp-paypal.php on line 198
 * I’ve been checking the code, but I’m not able to find where do you get that variable,
   what is extra_url for ? Will i have problems if I set some ifs to check if the
   parameter exists ?
 * [https://wordpress.org/plugins/booking-system/](https://wordpress.org/plugins/booking-system/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/)
 * (@dotonpaper)
 * [10 years, 8 months ago](https://wordpress.org/support/topic/undefined-extra_url/#post-6561436)
 * Hello,
 * You can send an email at [support@dotonpaper.zendesk.com](https://wordpress.org/support/topic/undefined-extra_url/support@dotonpaper.zendesk.com?output_format=md)
   to check this.
 * Thank you.

Viewing 1 replies (of 1 total)

The topic ‘Undefined $extra_url’ is closed to new replies.

 * ![](https://ps.w.org/booking-system/assets/icon-256x256.png?rev=2192807)
 * [Pinpoint Booking System - Version 2](https://wordpress.org/plugins/booking-system/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/booking-system/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/booking-system/)
 * [Active Topics](https://wordpress.org/support/plugin/booking-system/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/booking-system/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/booking-system/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/)
 * Last activity: [10 years, 8 months ago](https://wordpress.org/support/topic/undefined-extra_url/#post-6561436)
 * Status: resolved