Tests 1 to 11 are incorrect because they don't provide UTF-8. Replace 

is truncate_utf8($in, ...), "...";

[download]
with 
is truncate_utf8(encode_utf8($in), ...), encode_utf8("...");

[download]

In reply to Re^3: truncate string to byte count by ikegami
in thread truncate string to byte count by morgon

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