I am installing mediawiki on a windows machine using 1.27, php5.6.25, and abyss server 2.11.1.
In the php.ini I have the zend.multibyte = On and the two related DLLs, php_mbstring.dll and php_exif.dll, set.
But I always get the message that I am missing mbstring.
There is no documentation anywhere about what settings mediawiki needs in PHP for mbstring to function.