Title: PHP undefined index errors
Last modified: February 1, 2021

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# PHP undefined index errors

 *  [wwwolf](https://wordpress.org/support/users/wwwolf/)
 * (@wwwolf)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/php-undefined-index-errors/)
 * Anybody know what might be causing these (repeated) errors – hundreds of them
   in main site error log:
 * [01-Feb-2021 12:18:52 UTC] All-in-One Event Calendar: Undefined index: TZID @/
   home/XXXXXXXX/public_html/wp/wp-content/plugins/all-in-one-event-calendar/lib/
   iCal/iCalcreator-2.26.9/src/IcalXML.php:318 #8
    [01-Feb-2021 12:18:52 UTC] All-
   in-One Event Calendar: Undefined index: TZID @ /home/XXXXXXXX/public_html/wp/
   wp-content/plugins/all-in-one-event-calendar/lib/iCal/iCalcreator-2.26.9/src/
   IcalXML.php:318 #8 [01-Feb-2021 12:18:52 UTC] All-in-One Event Calendar: Trying
   to access array offset on value of type int @ /home/XXXXXXXX/public_html/wp/wp-
   content/plugins/all-in-one-event-calendar/lib/iCal/iCalcreator-2.26.9/src/IcalXML.
   php:718 #8 [01-Feb-2021 12:18:52 UTC] All-in-One Event Calendar: Trying to access
   array offset on value of type null @ /home/XXXXXXXX/public_html/wp/wp-content/
   plugins/all-in-one-event-calendar/lib/iCal/iCalcreator-2.26.9/src/IcalXML.php:
   318 #8
 * Thanks!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-undefined-index-errors%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Thread Starter [wwwolf](https://wordpress.org/support/users/wwwolf/)
 * (@wwwolf)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/php-undefined-index-errors/#post-14004038)
 * OK, instead, can anyone tell me how to disable the iCal creator, since that seems
   to be what’s causing the problem? I had a look in settings but can’t see an option
   for that (only a partial hide).
 * This site has quite a lot of plugins on it – are there any known incompatibilities?
 * If we can’t find a way to fix this, I’ll simply have to move to a different plugin…
   non-trivial, since it’s well integrated into the site, and has a significant 
   archive I’d rather not lose 🙁
 *  [Rhapsody348](https://wordpress.org/support/users/rhapsody348/)
 * (@rhapsody348)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/php-undefined-index-errors/#post-14028485)
 * check this solution I posted – [https://wordpress.org/support/topic/icalxml-php-error-300-lines-of-errors-and-growing/#post-13580890](https://wordpress.org/support/topic/icalxml-php-error-300-lines-of-errors-and-growing/#post-13580890)

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘PHP undefined index errors’ is closed to new replies.

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## Tags

 * [PHP errors](https://wordpress.org/support/topic-tag/php-errors/)
 * [undefined index](https://wordpress.org/support/topic-tag/undefined-index/)

 * 2 replies
 * 2 participants
 * Last reply from: [Rhapsody348](https://wordpress.org/support/users/rhapsody348/)
 * Last activity: [5 years, 3 months ago](https://wordpress.org/support/topic/php-undefined-index-errors/#post-14028485)
 * Status: not resolved