php 各种数据库通用类

php各种数据库通用类.方便操作。require_once("db_msql.inc");require_once("db_mssql.inc");require_once("db_mysql.inc");require_once("db_oci8.inc");require_once("db_odbc.inc");require_once("db_oracle.inc");require_once("db_pgsql.inc");require_once("db_sybase.inc"