Title: [Plugin: Mark Unread Comments] Header Conflict
Last modified: August 20, 2016

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# [Plugin: Mark Unread Comments] Header Conflict

 *  [Don Elliott](https://wordpress.org/support/users/donisflying/)
 * (@donisflying)
 * [14 years, 7 months ago](https://wordpress.org/support/topic/plugin-mark-unread-comments-header-conflict/)
 * The plugin installs fine, but then when a user logs in and goes to view a post,
   we get this:
 * Warning: unserialize() expects parameter 1 to be string, array given in /home/
   sitename/public_html/wp-content/plugins/mark-unread-comments/mark-unread-comments.
   php on line 25
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/sitename/public_html/wp-content/plugins/mark-unread-comments/mark-unread-
   comments.php:25) in /home/sitename/public_html/wp-content/plugins/mark-unread-
   comments/mark-unread-comments.php on line 32
 * [http://wordpress.org/extend/plugins/mark-unread-comments/](http://wordpress.org/extend/plugins/mark-unread-comments/)

The topic ‘[Plugin: Mark Unread Comments] Header Conflict’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/mark-unread-comments.svg)
 * [Mark Unread Comments](https://wordpress.org/plugins/mark-unread-comments/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mark-unread-comments/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/mark-unread-comments/)
 * [Active Topics](https://wordpress.org/support/plugin/mark-unread-comments/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/mark-unread-comments/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/mark-unread-comments/reviews/)

 * 0 replies
 * 1 participant
 * Last reply from: [Don Elliott](https://wordpress.org/support/users/donisflying/)
 * Last activity: [14 years, 7 months ago](https://wordpress.org/support/topic/plugin-mark-unread-comments-header-conflict/)
 * Status: not resolved