thorsten / phpMyFAQ

			if ($countbytes == 0) { // get starting octect

				if ($char <= 0x7F) {

					return $char; // use the character "as is" because is ASCII

				} elseif (($char >> 0x05) == 0x06) { // 2 bytes character (0x06 = 110 BIN)

					$bytes[] = ($char - 0xC0) << 0x06;

					++$countbytes;

					$numbytes = 2;

				} elseif (($char >> 0x04) == 0x0E) { // 3 bytes character (0x0E = 1110 BIN)

					$bytes[] = ($char - 0xE0) << 0x0C;

					++$countbytes;

					$numbytes = 3;

					$bytes[] = ($char - 0xE0) << 0x0C;

					++$countbytes;

					$numbytes = 3;

				} elseif (($char >> 0x03) == 0x1E) { // 4 bytes character (0x1E = 11110 BIN)

					$bytes[] = ($char - 0xF0) << 0x12;

					++$countbytes;

					$numbytes = 4;

				} else {

					// use replacement character for other invalid sequences

					return 0xFFFD;

				}