Title: PHP Warning: Undefined array key “enable_api”
Last modified: May 5, 2023

---

# PHP Warning: Undefined array key “enable_api”

 *  Resolved [kervadecg](https://wordpress.org/support/users/kervadecg/)
 * (@kervadecg)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-enable_api/)
 * Hello,
 * A warning message is poping up :
 * AH01071: Got error ‘PHP message: PHP Warning: Undefined array key “enable_api”
   in /htdocs/wp-content/plugins/participants-database/participants-database.php
   on line 390’
 * Is it an issue?
    -  This topic was modified 3 years ago by [kervadecg](https://wordpress.org/support/users/kervadecg/).

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [kervadecg](https://wordpress.org/support/users/kervadecg/)
 * (@kervadecg)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-enable_api/#post-16714073)
 * PDB 2.5.0 was creating a conflict and leading to a problem in Mailpoet: Editors
   were not able to update a “Text” block
 * I rolled back PDB from 2.5.0 to 2.4.8 and now everything is fine.
    -  This reply was modified 3 years ago by [kervadecg](https://wordpress.org/support/users/kervadecg/).
 *  Plugin Author [xnau webdesign](https://wordpress.org/support/users/xnau/)
 * (@xnau)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-enable_api/#post-16714597)
 * Please post new questions to a new topic, thanks!
 * The warning message will go away if you save the Participants Database settings.
 * [@thomaswesselplace](https://wordpress.org/support/users/thomaswesselplace/),
   make sure you have the free [xnau Plugin Updates plugin installed](https://xnau.com/work/wordpress-plugins/participants-database/the-xnau-plugin-updater/),
   it is necssary to get updates to our plugins.
 * [@kervadecg](https://wordpress.org/support/users/kervadecg/) if you can post 
   the details (such as exactly what happens, and any error messages you see) in
   a new thread, I’ll take a look…
 *  Thread Starter [kervadecg](https://wordpress.org/support/users/kervadecg/)
 * (@kervadecg)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-enable_api/#post-16715771)
 * OK, after saving the Participants Database settings, everything is fine.
 * Thanks a lot for your very quick answer

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘PHP Warning: Undefined array key “enable_api”’ is closed to new replies.

 * ![](https://ps.w.org/participants-database/assets/icon-256x256.jpg?rev=1389807)
 * [Participants Database](https://wordpress.org/plugins/participants-database/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/participants-database/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/participants-database/)
 * [Active Topics](https://wordpress.org/support/plugin/participants-database/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/participants-database/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/participants-database/reviews/)

 * 3 replies
 * 4 participants
 * Last reply from: [kervadecg](https://wordpress.org/support/users/kervadecg/)
 * Last activity: [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-enable_api/#post-16715771)
 * Status: resolved