ntwb / wordpress

                                $utf8 .= $chrs{$c};

                                break;

                            case ($ord_chrs_c & 0xE0) == 0xC0:

                                // characters U-00000080 - U-000007FF, mask 110XXXXX

                                //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

                                $utf8 .= $this->substr8($chrs, $c, 2);

                                ++$c;

                                break;

                            case ($ord_chrs_c & 0xF0) == 0xE0:

                                // characters U-00000800 - U-0000FFFF, mask 1110XXXX

                                ++$c;

                                break;

                            case ($ord_chrs_c & 0xF0) == 0xE0:

                                // characters U-00000800 - U-0000FFFF, mask 1110XXXX

                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

                                $utf8 .= $this->substr8($chrs, $c, 3);

                                $c += 2;

                                break;

                            case ($ord_chrs_c & 0xF8) == 0xF0:

                                // characters U-00010000 - U-001FFFFF, mask 11110XXX

                                $c += 2;

                                break;

                            case ($ord_chrs_c & 0xF8) == 0xF0:

                                // characters U-00010000 - U-001FFFFF, mask 11110XXX

                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

                                $utf8 .= $this->substr8($chrs, $c, 4);

                                $c += 3;

                                break;

                            case ($ord_chrs_c & 0xFC) == 0xF8:

                                // characters U-00200000 - U-03FFFFFF, mask 111110XX

                                $c += 3;

                                break;

                            case ($ord_chrs_c & 0xFC) == 0xF8:

                                // characters U-00200000 - U-03FFFFFF, mask 111110XX

                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

                                $utf8 .= $this->substr8($chrs, $c, 5);

                                $c += 4;

                                break;

                            case ($ord_chrs_c & 0xFE) == 0xFC:

                                // characters U-04000000 - U-7FFFFFFF, mask 1111110X

                                $c += 4;

                                break;

                            case ($ord_chrs_c & 0xFE) == 0xFC:

                                // characters U-04000000 - U-7FFFFFFF, mask 1111110X

                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

                                $utf8 .= $this->substr8($chrs, $c, 6);

                                $c += 5;

                                break;

                        }