Title: PHP error with the latest version.
Last modified: May 2, 2018

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# PHP error with the latest version.

 *  Resolved [dewfl](https://wordpress.org/support/users/dewfl/)
 * (@dewfl)
 * [8 years, 2 months ago](https://wordpress.org/support/topic/php-error-with-the-latest-version/)
 * After updating to the latest version 1.4.8 I’m getting this error:
 * Fatal error: Call to undefined function mb_strtoupper() in /home/pss/public_html/
   wp-content/plugins/wpforo/wpf-includes/functions.php on line 754
 * Any ideas how to fix this:
 * Any help would be greatly appreciated.

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

 *  Plugin Author [gVectors Team](https://wordpress.org/support/users/gvectors-team/)
 * (@gvectors-team)
 * [8 years, 2 months ago](https://wordpress.org/support/topic/php-error-with-the-latest-version/#post-10240682)
 * Hi [@dewfl](https://wordpress.org/support/users/dewfl/),
    This problem comes 
   from your server. The [multi-bit string functions](http://php.net/manual/en/book.mbstring.php)
   are not enabled in your PHP, please contact to the hosting services support and
   ask them to enable it. This functions are very popular and they must be enabled.
 * Installation details:
    [http://www.php.net/manual/en/mbstring.installation.php](http://www.php.net/manual/en/mbstring.installation.php)
    -  This reply was modified 8 years, 2 months ago by [gVectors Team](https://wordpress.org/support/users/gvectors-team/).
 *  Thread Starter [dewfl](https://wordpress.org/support/users/dewfl/)
 * (@dewfl)
 * [8 years, 2 months ago](https://wordpress.org/support/topic/php-error-with-the-latest-version/#post-10240789)
 * Thanks, fixed.

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

The topic ‘PHP error with the latest version.’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [dewfl](https://wordpress.org/support/users/dewfl/)
 * Last activity: [8 years, 2 months ago](https://wordpress.org/support/topic/php-error-with-the-latest-version/#post-10240789)
 * Status: resolved