EUC-CN, CP936, HZ, EUC-TW, CP950, BIG-5, EUC-KR, UHC (CP949), ISO-2022-KR, Windows-1251 (CP1251), Windows-1252 (CP1252), CP866, KOI8-R.
php.ini entry, which accepts encoding name, accepts "auto" and "pass" also. mbstring functions, which accepts encoding name, and accepts "auto ".