REG_ESUBREG 514 ext/ereg/regex/regcomp.c SETERROR(REG_ESUBREG); REG_ESUBREG 45 ext/ereg/regex/regerror.c {REG_ESUBREG, "REG_ESUBREG", "invalid backreference number"}, REG_ESUBREG 100 ext/mbstring/oniguruma/regposix.c { ONIGERR_TOO_BIG_BACKREF_NUMBER, REG_ESUBREG }, REG_ESUBREG 101 ext/mbstring/oniguruma/regposix.c { ONIGERR_INVALID_BACKREF, REG_ESUBREG }, REG_ESUBREG 91 ext/pcre/pcrelib/pcreposix.c REG_ESUBREG, /* reference to non-existent subpattern */