Title: “Cannot modify header information”
Last modified: November 3, 2020

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# “Cannot modify header information”

 *  [Amanda](https://wordpress.org/support/users/goldmare/)
 * (@goldmare)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-167/)
 * Unfortunately, the most recent update of WordPress seems to have a conflict with
   MK Simple Backups. the “Notice: undefined variable” was already reported, but
   mine has, in addition to a couple of these, a number of other errors.
 * There are three “Warning: Cannot modify header information” errors, one “Notice:
   add_submenu_page was called incorrectly” and one “Deprecated: get_bloginfo was
   called with an argument that is deprecated”.
 * Concerning the “Deprecated” error, it states that “siteurl” should be replaced
   with “url”. It also says that “siteurl” has been deprecated for a long time, 
   so I don’t think changing it will adversely effect websites that are not completely
   up-to-date. Also, the two “Notice: undefined variable” errors are on line 49 
   of mk-simple-backups.php.
 * I have disabled the plugin for now, as I do not need it on a daily basis anyway,
   but once the errors are fixed, I will definitely reactivate. The website I used
   this plugin on is a very small and simple website, so I consider this backup 
   plugin to be the most suitable. Thank you for your time. 🙂

The topic ‘“Cannot modify header information”’ is closed to new replies.

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## Tags

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

 * 0 replies
 * 1 participant
 * Last reply from: [Amanda](https://wordpress.org/support/users/goldmare/)
 * Last activity: [5 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-167/)
 * Status: not resolved