Use mbstring functions instead of deprecated utf8 functions #9
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utf8 functions like utf8_strlen will be deprecated in MantisBT 2.13.0 [1]
The functions are still supported but will generate DEPRCECATED messages in PHP logs.
The functions are no longer needed as we made
mbstring
a mandatory PHP extension.[1] https://mantisbt.org/bugs/view.php?id=23214