Can str_replace be safely used on a UTF-8 encoded string if it's only given valid UTF-8 encoded strings as arguments?

Question

PHP\'s str_replace() was intended only for ANSI strings and as such can mangle UTF-8 strings. However, given that it\'s binary-safe would it work properly if it

Answer 1

Yes, I think this is correct, at least I couldn't find any counter-example.