Title: Undefined Array Key Warnings
Last modified: March 15, 2022

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# Undefined Array Key Warnings

 *  Resolved [Derek Padula](https://wordpress.org/support/users/derekpadula/)
 * (@derekpadula)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/undefined-array-key-warnings/)
 * Whenever I submit a message through my form or update the settings in the admin,
   I receive multiple messages that state, “Warning: Undefined array key ‘___’ on/
   var/….php on line ___”
 * I’ve shared screenshots here:
 * > [Quick Contact Form Undefined Array Key Warning](https://imgur.com/a/1VQUhk8)
 * Is this due to a problem with PHP8? I saw in a support post from a year ago that
   you said you weren’t going to support PHP8. Is that still the case?

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

 *  [Alan Fuller](https://wordpress.org/support/users/alanfuller/)
 * (@alanfuller)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/undefined-array-key-warnings/#post-15459934)
 * Hi,
 * Warnings and Notices are not functional issues.
 * They exist to advise developers and should NEVER be enabled to display on a production
   website.
 * If you are seeing Warnings and Notices on a production site that is not in DEBUG
   mode then you have got some settings incorrect and you should change them so 
   Warning and Errors are not displayed.
 * See also [https://fullworks.net/docs/plugins-general/troubleshooting-plugins-general/php-notices-and-warnings/](https://fullworks.net/docs/plugins-general/troubleshooting-plugins-general/php-notices-and-warnings/)
 * In terms of PHP 8.0 I don’t have any issues using it on PHP 8.0 ( obviously errors
   and warnings logged but not impacting functionality )
 *  [Alan Fuller](https://wordpress.org/support/users/alanfuller/)
 * (@alanfuller)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/undefined-array-key-warnings/#post-15459945)
 * I wrote that long response and then realised it is spelt out on the plugin README
 * [https://ibb.co/NZQrqjF](https://ibb.co/NZQrqjF)
    -  This reply was modified 4 years, 2 months ago by [Alan Fuller](https://wordpress.org/support/users/alanfuller/).
    -  This reply was modified 4 years, 2 months ago by [Alan Fuller](https://wordpress.org/support/users/alanfuller/).
    -  This reply was modified 4 years, 2 months ago by [Alan Fuller](https://wordpress.org/support/users/alanfuller/).
 *  Thread Starter [Derek Padula](https://wordpress.org/support/users/derekpadula/)
 * (@derekpadula)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/undefined-array-key-warnings/#post-15462923)
 * Yes, I did have debug mode turned on. It was for other issues. Then I saw these
   warnings and thought I’d let you know.
 * Turning off debugging turned off the warnings.

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

The topic ‘Undefined Array Key Warnings’ is closed to new replies.

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## Tags

 * [array key](https://wordpress.org/support/topic-tag/array-key/)
 * [php](https://wordpress.org/support/topic-tag/php/)
 * [warning](https://wordpress.org/support/topic-tag/warning/)

 * 3 replies
 * 2 participants
 * Last reply from: [Derek Padula](https://wordpress.org/support/users/derekpadula/)
 * Last activity: [4 years, 2 months ago](https://wordpress.org/support/topic/undefined-array-key-warnings/#post-15462923)
 * Status: resolved