Hi Alain, I should advertise patchwork/utf8<https://github.com/nicolas-grekas/Patchwork-UTF8>here :) I am trying to use this to validate input that is supposed to be UTF-8 and > to > replace any bad characters with something - '?' would do. > I'd personally take an other way: ill formed utf-8 sequences do not exist in non bugged applications. What is much more common is an application that sends something else than UTF-8. If you don't know what your input charset encoding is, then HTML5 tells us that CP1252 is a good default fall-back. Thus, I'd recommend using this snippet (preg_match is the quickest way to check for utf-8 in PHP): $input = "..."; if (!preg_match('//u', $input)) { $input = iconv('CP1252', 'UTF-8', $input); } // here, $input is always an utf-8 string Regards, Nicolas
