Question

I have a strange result with:

strlen("òàùè")

How can I count correctly the string with no-ASCII characters?

I also looked at mb_strlen(), but it does not solve the problem.

Answer 1

mb_strlen will

Return the number of characters in string $str having character encoding $encoding. A multi-byte character is counted as 1.

Your internal encoding is likely not set to UTF-8, so do

echo mb_strlen('òàùè', 'UTF-8');

Or set UTF-8 globally:

mb_internal_encoding('UTF-8');

And then do

echo mb_strlen("òàùè");

will give 4 (demo).