Title: Fatal error – undefined function
Last modified: August 31, 2016

---

# Fatal error – undefined function

 *  Resolved [mgreis](https://wordpress.org/support/users/mgreis/)
 * (@mgreis)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-7/)
 * I just installed the new RDP Wiki Embed plug to replace the old RDP Wiki Press
   Embed. That never quite worked for me, so I thought I would start fresh with 
   the newly-forked plugin. (I deactivated and uninstalled the old plugin and cleared
   the cache on the settings page of the new one.)
 * I get the following error message (on any page I try to embed):
    `Fatal error:
   Call to undefined function retrieve_url_contents() in /home/rba/public_html/blog/
   wp-content/plugins/rdp-wiki-embed/bl/simple_html_dom.php on line 78`
 * I appreciate any help you can provide – thanks!
 * Michael
 * [https://wordpress.org/plugins/rdp-wiki-embed/](https://wordpress.org/plugins/rdp-wiki-embed/)

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

 *  Plugin Author [Robert D Payne](https://wordpress.org/support/users/rpayne7264/)
 * (@rpayne7264)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-7/#post-7275037)
 * Michael,
 * See if this works:
    1) Open up rdp-wiki-embed/bl/simple_html_dom.php. 2) Uncomment
   line 76. 3) Comment out line 78.
 * –Robert
 *  Thread Starter [mgreis](https://wordpress.org/support/users/mgreis/)
 * (@mgreis)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-7/#post-7275040)
 * Robert,
 * Works like a champ!
 * Same goes for this new version of the plug-in. I can finally cleanly embed wiki
   pages.
 * Thanks!
 * Michael

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

The topic ‘Fatal error – undefined function’ is closed to new replies.

 * ![](https://ps.w.org/rdp-wiki-embed/assets/icon-128x128.png?rev=1616428)
 * [RDP Wiki Embed](https://wordpress.org/plugins/rdp-wiki-embed/)
 * [Support Threads](https://wordpress.org/support/plugin/rdp-wiki-embed/)
 * [Active Topics](https://wordpress.org/support/plugin/rdp-wiki-embed/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/rdp-wiki-embed/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/rdp-wiki-embed/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [mgreis](https://wordpress.org/support/users/mgreis/)
 * Last activity: [10 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-7/#post-7275040)
 * Status: resolved