Page titles have question marks instead of letters. How to fix, friends?

Question

Character encoding

Please help fix the error. Now the value is "AddDefaultCharset utf-8"

Answer 1

This problem occurs when text is truncated using functions that do not work with multibyte encodings.
Now your text is cut off like this:
$title = substr($title, 0 ,15);
but you need
$title = mb_substr($title, 0 ,15);
more details here: https://secure.php.net/manual/en/ref.mbstring.php