utf_8 not working

[eluser]anpmtp[/eluser]
in my codeigniter utf-8 is not working.

i have to add $config['charset'] = "UTF-8"; in my config file.

and then i use one variable in view and add an arabic string to it. then i echo that variable gives result as ????? ???? ??

plz help me.........

[eluser]Georgi Budinov[/eluser]
Check encoding of the file you are editing.