From this tutorial you’ll learn how to cope with Call to undefined function mb_substr () error, which can appear after template installation
Solving “Call to undefined function mb_substr ()” Error
- This error can be caused by the missing mbstring PHP extension. You’ll need to install or enable it on your hosting server in order to fix this issue.
- Feel free to contact your hosting server provider to enable mbstring. It will allow you to deal with multibyte encodings in PHP.
- You can also install it yourself. Please, navigate to Multibyte String Installation article to learn in details about how to install mbstring.