Title: PHP Warnings
Last modified: May 18, 2022

---

# PHP Warnings

 *  [Silas_229](https://wordpress.org/support/users/silas2209/)
 * (@silas2209)
 * [4 years ago](https://wordpress.org/support/topic/php-warnings-134/)
 * Hi, I get these warnings in my WordPress Backend:
 * Warning: Trying to access array offset on value of type null in ../wp-content/
   plugins/multisite-toolbar-additions/includes/ddwlib-plir/ddwlib-plugin-installer-
   recommendations.php on line 346
 * Warning: Cannot modify header information – headers already sent by (output started
   at ../wp-content/plugins/multisite-toolbar-additions/includes/ddwlib-plir/ddwlib-
   plugin-installer-recommendations.php:346) in ../wp-admin/admin-header.php on 
   line 9
 * I use PHP 8.0

The topic ‘PHP Warnings’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/multisite-toolbar-additions_9a6fd0.
   svg)
 * [Multisite Toolbar Additions](https://wordpress.org/plugins/multisite-toolbar-additions/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/multisite-toolbar-additions/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/multisite-toolbar-additions/)
 * [Active Topics](https://wordpress.org/support/plugin/multisite-toolbar-additions/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/multisite-toolbar-additions/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/multisite-toolbar-additions/reviews/)

## Tags

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

 * 0 replies
 * 1 participant
 * Last reply from: [Silas_229](https://wordpress.org/support/users/silas2209/)
 * Last activity: [4 years ago](https://wordpress.org/support/topic/php-warnings-134/)
 * Status: not resolved