ADOdb
ADOdb is a database abstraction library for PHP, originally based on the same concept as Microsoft's ActiveX Data Objects. It allows developers to write applications in a consistent way regardless of the underlying database system storing the information. The advantage is that the database system can be changed without re-writing every call to it in the application. Features. ADOdb supports the following databases: Legacy, unsupported or obsolete drivers may still be found in older releases of ADOdb. In addition to the Database Abstraction Layer, ADOdb includes the following features: