Title: Undefined array key “deactivate”, php fatal error
Last modified: February 8, 2023

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# Undefined array key “deactivate”, php fatal error

 *  Resolved [artiomrudenco](https://wordpress.org/support/users/artiomrudenco/)
 * (@artiomrudenco)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-deactivate-php-fatal-error/)
 * Dear Support, 
   We got fatal error. Details:WordPress: 6.1PHP version: 8.1Error:
   Got error ‘PHP message: PHP Warning: Undefined array key “deactivate” in …./frontend/
   wp-content/plugins/nelio-ab-testing/admin/pages/class-nelio-ab-testing-plugin-
   list-page.php on line 60’, referer …./wp-admin/plugins.php
    1. wp-content/plugins/nelio-ab-testing/admin/pages/class-nelio-ab-testing-plugin-
       list-page.php:60
    2. `Nelio_AB_Testing_Plugin_List_Page->customize_plugin_actions()`
       wp-includes/
       class-wp-hook.php:310
    3. `apply_filters('plugin_action_links_nelio-ab-testing/nelio-ab-testing.php')`
       
       wp-admin/includes/class-wp-plugins-list-table.php:974
    4. `WP_Plugins_List_Table->single_row()`
       wp-admin/includes/class-wp-plugins-list-
       table.php:695
    5. `WP_Plugins_List_Table->display_rows()`
       wp-admin/includes/class-wp-list-table.
       php:1444
    6. `WP_List_Table->display_rows_or_placeholder()`
       wp-admin/includes/class-wp-list-
       table.php:1371
    7. `WP_List_Table->display()`
       wp-admin/plugins.php:773
 * Could you please check and fix it. 
   Thanks in advance !

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [David Aguilera](https://wordpress.org/support/users/davilera/)
 * (@davilera)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-deactivate-php-fatal-error/#post-16453446)
 * Hi! Thanks for the heads up. Right now, I’m AFK. Could you please try the following?
   
   In ` admin/pages/class-nelio-ab-testing-plugin-list-page.php` line 60, change
   this:
 *     ```wp-block-code
       $actions['deactivate']
       ```
   
 * into this:
 *     ```wp-block-code
       isset( $actions['deactivate'] ) ? $actions['deactivate'] : __( 'Deactivate' )
       ```
   
 * And let me know how it went. I think this should fix the issue. If it does, I’ll
   include it in the next release, which I’ll publish ASAP.
 *  Plugin Author [David Aguilera](https://wordpress.org/support/users/davilera/)
 * (@davilera)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-deactivate-php-fatal-error/#post-16454586)
 * Version 5.4.1 fixes this issue.
 *  Thread Starter [artiomrudenco](https://wordpress.org/support/users/artiomrudenco/)
 * (@artiomrudenco)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-deactivate-php-fatal-error/#post-16455700)
 * [@davilera](https://wordpress.org/support/users/davilera/) 
   ATM it works fine,
   In process of testing. Thank you !!
 *  Plugin Author [David Aguilera](https://wordpress.org/support/users/davilera/)
 * (@davilera)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-deactivate-php-fatal-error/#post-16455703)
 * I’m glad I could help 😀

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Undefined array key “deactivate”, php fatal error’ is closed to new replies.

 * ![](https://ps.w.org/nelio-ab-testing/assets/icon-256x256.png?rev=2514600)
 * [Nelio A/B Testing – AB Tests and Heatmaps for Better Conversion Optimization](https://wordpress.org/plugins/nelio-ab-testing/)
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 * 4 replies
 * 2 participants
 * Last reply from: [David Aguilera](https://wordpress.org/support/users/davilera/)
 * Last activity: [3 years, 3 months ago](https://wordpress.org/support/topic/undefined-array-key-deactivate-php-fatal-error/#post-16455703)
 * Status: resolved