Simpler Unicode solution for PHP6

Hi, As a simpler to implement approach to Unicode, could we perhaps support it just by adding an “is UTF-8” flag to strings internally? Then unmodified functions would just see a normal string and handle it like they do any other, and modified and new Unicode-aware functions would test for the presence of the flag and handle the string appropriately in that case. Thoughts? — Andrea Faulds http://ajf.me/