should i multi-byte overloading (mbstring.func_overload)?

i'm slight origination php site unicode-aware. i'm wondering anyone trust mbstring.func_overload setting, replaces normal twine functions (e.g. strlen) multi-byte equivalents (mb_strlen). there aren't any comments php authority page.

are there any appetite problems i should wakeful of? any cases where job multi-byte chronicle bad idea?

i suspect instance functions understanding encryption, given competence design understanding strings bytes, rather strings characters.

also, authority page includes note: "it permitted duty overloading choice per-directory context, since it's reliable nonetheless quick adequate prolongation sourroundings competence lead capricious behaviour."

does meant it's quick per-directory context, it's generally stable? articulation unclear.