The OCI8 Extension ------------------ Use the OCI8 extension to access Oracle Database. Documentation is at http://php.net/oci8 The extension can be built with PHP versions 4.3.9 to 5.x using Oracle 9.2, 10, or 11 client libraries. Oracle's standard cross-version connectivity applies. For example PHP linked with Oracle 11.2 client libraries can connect to Oracle Database 9.2 onwards. See Oracle's note "Oracle Client / Server Interoperability Support" (ID 207303.1) for details.