Title: PHP 8.0 – Fatal Error
Last modified: August 11, 2022

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# PHP 8.0 – Fatal Error

 *  Resolved [hustlefish](https://wordpress.org/support/users/hustlefish/)
 * (@hustlefish)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/php-8-0-error-7/)
 * Just upgraded our website to PHP 8.0 and getting the following error
 * Fatal error: Uncaught Error: in_array(): Argument #2 ($haystack) must be of type
   array, bool given
    in /srv/htdocs/wp-content/plugins/eventON/includes/calendar/
   class-calendar-event-structure.php on line 61
    -  This topic was modified 3 years, 10 months ago by [hustlefish](https://wordpress.org/support/users/hustlefish/).

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

 *  Plugin Support [ArtemSupport](https://wordpress.org/support/users/artemsupport/)
 * (@artemsupport)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/php-8-0-error-7/#post-15910763)
 * Hello,
    Please try going to EventON > EventTop > EventTop Main Day block fields
   > enable Event Day Name or any other you like.
 *  Thread Starter [hustlefish](https://wordpress.org/support/users/hustlefish/)
 * (@hustlefish)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/php-8-0-error-7/#post-15911012)
 * This fixed the issue. Thanks so much!
 *  Plugin Support [ArtemSupport](https://wordpress.org/support/users/artemsupport/)
 * (@artemsupport)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/php-8-0-error-7/#post-15915173)
 * If you have any other questions kindly let us know 🙂 – if you also have a moment
   we would greatly appreciate a kind review as it helps us spread the word and 
   continue to support EventON platform for more people.
 * Many Thanks!!

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

The topic ‘PHP 8.0 – Fatal Error’ is closed to new replies.

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 * [EventON - Events Calendar](https://wordpress.org/plugins/eventon-lite/)
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 * 3 replies
 * 2 participants
 * Last reply from: [ArtemSupport](https://wordpress.org/support/users/artemsupport/)
 * Last activity: [3 years, 10 months ago](https://wordpress.org/support/topic/php-8-0-error-7/#post-15915173)
 * Status: resolved