Title: Undefined array key “” in …
Last modified: October 12, 2021

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# Undefined array key “” in …

 *  Resolved [fwkart](https://wordpress.org/support/users/fwkart/)
 * (@fwkart)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-in/)
 * Hello. I currently have a problem
 * `Warning: Undefined array key "" in /....../wp-content/plugins/wp-html-mail-woocommerce/
   includes/class-wphtmlmail-woocommerce.php on line 796`
 * What could be the reason for this? This error message is displayed in the template
   editor as well as in the order email. See screenshot
 * [https://i.imgur.com/ECpS3og.jpg](https://i.imgur.com/ECpS3og.jpg)
 * Greetings

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Thread Starter [fwkart](https://wordpress.org/support/users/fwkart/)
 * (@fwkart)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-in/#post-14964132)
 * Edit:
 * I have noticed that since the error occurred, I also get an error when I update
   a plugin. Could the original error be related to this one?
 * `Warning: set_time_limit(): Cannot set max execution time limit due to system
   policy in /........./wp-admin/includes/class-wp-upgrader.php on line 471`
 * [https://i.imgur.com/JquOyMV.jpg](https://i.imgur.com/JquOyMV.jpg)
 *  Thread Starter [fwkart](https://wordpress.org/support/users/fwkart/)
 * (@fwkart)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-in/#post-14964297)
 * Ok. I have the error. PHP 8 is apparently not supported. At least the error messages
   disappear when I downgrade to 7.4.
 * What’s strange is that I’ve been using PHP 8.0 for a few weeks now.
 * Are there any known problems in this regard? I am at a loss.
 * Best regards
 *  Plugin Support [Julian](https://wordpress.org/support/users/juliangk/)
 * (@juliangk)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-in/#post-14965168)
 * Hello [@fwkart](https://wordpress.org/support/users/fwkart/),
 * our plugin has not yet been thoroughly tested for PHP 8. The error message concerning“
   set_time_limit()” seems very much to be a server issue (or server configuration).
   In this regard there is not much we can do as it relates to WooCommerce, not 
   our plugin.
 * We will test our plugins and extend compatibility in the near future.
 * Is there anything else we can help you with?
 * Best regards
    Julian
 *  Thread Starter [fwkart](https://wordpress.org/support/users/fwkart/)
 * (@fwkart)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-in/#post-14965457)
 * Hi Julian.
 * No thanks. The problem is fixed for now. Sorry for this spam here ^^ Would be
   nice if you would upgrade to PHP 8
 * Best regards
    René
 *  Plugin Support [Julian](https://wordpress.org/support/users/juliangk/)
 * (@juliangk)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-in/#post-14965558)
 * Hello Rene,
 * we will chek compatibility at some point.
 * Please let us know if there is anything else we can do for you.
 * Best regards
    Julian

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Undefined array key “” in …’ is closed to new replies.

 * ![](https://ps.w.org/wp-html-mail/assets/icon-256x256.png?rev=1730334)
 * [Email Template Designer - WP HTML Mail](https://wordpress.org/plugins/wp-html-mail/)
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 * 5 replies
 * 2 participants
 * Last reply from: [Julian](https://wordpress.org/support/users/juliangk/)
 * Last activity: [4 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-in/#post-14965558)
 * Status: resolved