UTF8ToLower is available since version 2.0.
Prototype:
string UTF8ToLower(string szStr[, boolean bTurk=false])
Parameters
szStr
the UTF-8 string to be converted to lowercase
bTurk
true if string is in a turkish language
Description:
Converts a UTF-8 string to lowercase.
Return value:
The UTF-8 string in lowercase.