PDO_NULL_EMPTY_STRING 1409 ext/pdo/pdo_dbh.c 	REGISTER_PDO_CLASS_CONST_LONG("NULL_EMPTY_STRING",	(long)PDO_NULL_EMPTY_STRING);
PDO_NULL_EMPTY_STRING  609 ext/pdo/pdo_stmt.c 			if (value && !(value_len == 0 && stmt->dbh->oracle_nulls == PDO_NULL_EMPTY_STRING)) {