REG_EXTENDED       35 ext/ereg/regex/regex.h #define	REG_EXTENDED	0001
REG_EXTENDED       42 ext/mbstring/oniguruma/onigposix.h #define REG_EXTENDED       (1<<4) /* if not setted, Basic Onigular Expression */
REG_EXTENDED       70 ext/pcre/pcrelib/pcreposix.h #define REG_EXTENDED  0