Hi @tyggis,
Thank you for using Paid Memberships Pro. I hope you had a great weekend 🙂
You are able to use the Register Helper Add-on to add additional fields to the PMPro checkout page – https://www.paidmembershipspro.com/add-ons/free-add-ons/pmpro-register-helper-add-checkout-and-profile-fields/
It is a free add-on.
I hope this helps 🙂 – please let me know if you have any further questions regarding this.
Thread Starter
tyggis
(@tyggis)
Thanks. I activated the plugin and inserted the code here: https://gist.github.com/strangerstudios/5826655 at mu functions.php. But there are no new fields displayed.
Thank you for the feedback @tyggis, I have just tested this and it works as expected on my end.
Would you mind sending a screenshot of your functions.php where the Register Helper Code is added.
Could you also please check to see if your site is throwing any errors. You may do so by following this documentation – https://codex.ww.wp.xz.cn/Debugging_in_WordPress
I hope this helps. Please let me know.
Thread Starter
tyggis
(@tyggis)
It worked now. Hmmm, could have been a cache problem? In all three browsers I tested it…

It is possible that it could have been a caching issue.
Glad to hear it is now working as intended 🙂