PCRE_NEVER_UTF   9071 ext/pcre/pcrelib/pcre_compile.c if ((options & PCRE_NEVER_UTF) != 0) never_utf = TRUE;
PCRE_NEVER_UTF   1120 ext/pcre/pcrelib/pcre_internal.h    PCRE_JAVASCRIPT_COMPAT|PCRE_UCP|PCRE_NO_START_OPTIMIZE|PCRE_NEVER_UTF)