NuSOAP charset encoding issues

Once when I used NuSOAP, I faced problem in the display of chinese characters. They are displayed as question marks. Finally , I was able to crack it by setting the below varaible to false.
$soapClient->decode_utf8 = false;

Reference: 

http://stackoverflow.com/questions/5317858/nusoap-and-content-type

http://forum.nusphere.com/nusoap-with-utf-8-t4974.html