Title: Call to undefined function is_multi_author()
Last modified: August 21, 2016

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# Call to undefined function is_multi_author()

 *  [mrlithid](https://wordpress.org/support/users/mrlithid/)
 * (@mrlithid)
 * [12 years, 6 months ago](https://wordpress.org/support/topic/call-to-undefined-function-is_multi_author/)
 * I get this error when I try loading this. I can load the main page by commenting
   out the if statement on line 54.
 * PHP Fatal error: Call to undefined function is_multi_author() in /public/wp-content/
   themes/pieces/functions.php on line 54
 * Just leaving some feedback. Thanks.

Viewing 1 replies (of 1 total)

 *  Theme Author [csthemes](https://wordpress.org/support/users/csthemes/)
 * (@csthemes)
 * [12 years, 6 months ago](https://wordpress.org/support/topic/call-to-undefined-function-is_multi_author/#post-4401964)
 * What your WordPress version? is_multi_author() is a function introduced in WordPress
   3.2. There should be no problem if you have an updated WordPress install.

Viewing 1 replies (of 1 total)

The topic ‘Call to undefined function is_multi_author()’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [csthemes](https://wordpress.org/support/users/csthemes/)
 * Last activity: [12 years, 6 months ago](https://wordpress.org/support/topic/call-to-undefined-function-is_multi_author/#post-4401964)
 * Status: not resolved