I needed to convert some Unicode UTF16-BE strings (as used in Java) to UTF-8 (which is “byte-orientated” and so doesn’t need to worry about endianness) – however, there didn’t seem to many examples online. I’m not going to say these methods are robust, 100% accurate for every use case or even the best way to do it – but just ways to do it.
It’s worth noting that Java uses the escape sequence \uXXXX (where X is a hexadecimal code), and PHP uses the nearly similar escape sequence \u{XXXX} . Both seem to use \xXX for a single character.