PS_UNDEF_MARKER  1011 ext/session/session.c 			if (memchr(ZSTR_VAL(key), PS_DELIMITER, ZSTR_LEN(key)) || memchr(ZSTR_VAL(key), PS_UNDEF_MARKER, ZSTR_LEN(key))) {
PS_UNDEF_MARKER  1020 ext/session/session.c 			smart_str_appendc(&buf, PS_UNDEF_MARKER);
PS_UNDEF_MARKER  1052 ext/session/session.c 		if (p[0] == PS_UNDEF_MARKER) {