php// Autoload library...useAnhskohbo\UConvert\UConvert;$vni_string="Xin chaøo theá giôùi";// Khoi tao UConvert voi string va bang ma cua no.$convert=newUConvert($vni_string, UConvert::VNI);// Chuyen doi sang UNICODEecho$convert->transform(UConvert::UNICODE);// Output: Xin...