The OCI8 extension requires Oracle 9iR2, 10g or 11g Client libraries. If the Oracle Database is on the same machine as PHP, the database software already contains the necessary libraries. When PHP is on a different machine, use the free » Oracle Instant Client libraries.

To use Oracle Instant Client, install the basic or basiclite Oracle Instant Client ZIP file or RPM package. When building PHP from source code, also install the sdk ZIP file or devel RPM package.

On Windows, OCI8 needs client libraries from version 10gR2 or greater. With some versions of Instant Client you may additionally need mfc71.dll and msvcr71.dll libraries.

You should run PHP with the same, or more recent, version of the Oracle libraries that OCI8 was built with.


If OCI8 uses 9iR2 or 10g client libraries, then PHP can connect to Oracle Database 8i, 9iR2, 10g or 11g. If OCI8 uses 11g client libraries, the database can be 9iR2, 10g or 11g.


Full OCI8 feature support is only available when using the most recent versions of the client libraries and database.

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