ADOdb is a database abstraction layer for PHP. Compatible with most supported databases, it provides an easy way to use the same code against all databases, Portable code can be written that runs unchanged. It also simplifies PHP database access, and includes an extended date/time library, database managed session control, XML database management, and an active record library
Easysoft ODBC, JDBC and XML drivers let you access Oracle, SQL Server, Salesforce.com, Access, InterBase, DB2, Derby, Sybase, Firebird, RMS, ISAM, Coda and Linc from Windows, Unix, Linux, Mac OS X and OpenVMS.