How do I detect non-ASCII characters in a string?

Question

If I have a PHP string, how can I determine if it contains at least one non-ASCII character or not, in an efficient way? And by non-ASCII character, I mean any character tha

Answer 1

If you do not want to deal with Regex in javascript you can do

detectUf8 : function(s) {
  var utf8=s.split('').filter(function(C) {
    return C.charCodeAt(0)>127;
  })
  return (utf8.join('').length>0);
},