Performs a character set conversion on the string
The input charset.
The output charset.
If you append the string //TRANSLIT to
out_charset transliteration is activated. This
means that when a character can't be represented in the target charset,
it can be approximated through one or several similarly looking
characters. If you append the string //IGNORE,
characters that cannot be represented in the target charset are silently
str is cut from the first
The string to be converted.