Not compatible with wordpress 4.0

Fatal error: Call to undefined function mb_strtoupper() in /public_html/wp-content/plugins/azindex/az-index-cache.php on line 863 errors are on every single index page

a real pity, because i think this is the best index plugin that exists for wordpress

Not sure how i’m going to handle making an index of all my posts now

https://ww.wp.xz.cn/plugins/azindex/