Title: Undefined index: delete
Last modified: August 31, 2016

---

# Undefined index: delete

 *  [Mick Levin](https://wordpress.org/support/users/mick-levin/)
 * (@mick-levin)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/undefined-index-delete/)
 * Hello,
 * After activating some other plugin on my DEV server the Query Monitor displayed
   this warning:
 * PHP Error Count Location Call Stack Component
 * Notice Undefined index: delete 1 wp-content/object-cache.php:186
 * WP_Object_Cache->delete()
    wp-content/object-cache.php:45 wp_cache_delete() wp-
   includes/meta.php:107 add_metadata() wp-includes/meta.php:201 update_metadata()
   wp-includes/user.php:725 update_user_meta() wp-content/plugins/ithemes-sync/client-
   dashboard.php:275 Ithemes_Sync_Client_Dashboard->admin_bar_menu() Unknown location
   do_action(‘wp_before_admin_bar_render’) wp-includes/admin-bar.php:88 wp_admin_bar_render()
   Unknown location do_action(‘in_admin_header’) wp-admin/admin-header.php:214
 * Plugin: ithemes-sync
 * Thanks.
 * [https://wordpress.org/plugins/memcached/](https://wordpress.org/plugins/memcached/)

Viewing 1 replies (of 1 total)

 *  [mihdan](https://wordpress.org/support/users/mihdan/)
 * (@mihdan)
 * [9 years, 9 months ago](https://wordpress.org/support/topic/undefined-index-delete/#post-7240604)
 *     ```
       // Constructor
       function WP_Object_Cache() {
       	$this->stats = [
       		'add' => 0,
       		'delete' => 0,
       		'get' => 0,
       		'get_multi' => 0,
       	];
       }
       ```
   

Viewing 1 replies (of 1 total)

The topic ‘Undefined index: delete’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/memcached.svg)
 * [Memcached Object Cache](https://wordpress.org/plugins/memcached/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/memcached/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/memcached/)
 * [Active Topics](https://wordpress.org/support/plugin/memcached/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/memcached/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/memcached/reviews/)

## Tags

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

 * 1 reply
 * 2 participants
 * Last reply from: [mihdan](https://wordpress.org/support/users/mihdan/)
 * Last activity: [9 years, 9 months ago](https://wordpress.org/support/topic/undefined-index-delete/#post-7240604)
 * Status: not resolved