REG_EESCAPE        50 ext/ereg/regex/regex.h #define	REG_EESCAPE	 5
REG_EESCAPE        50 ext/mbstring/oniguruma/onigposix.h #define REG_EESCAPE          5
REG_EESCAPE        83 ext/pcre/pcrelib/pcreposix.h REG_EESCAPE,     /* bad escape sequence */