The Oracle functions provide an alternative to the OCI8 functions, also available in PHP. Unlike OCI8, these functions can be used to access Oracle databases prior to version 8i. However, if you are accessing Oracle 8i databases, the OCI8 functions provide better functionality and a performance increase. To compile Oracle support into PHP, use the --with-oracle flag when calling the PHP configuration program. Don't forget to set the ORACLE_HOME and ORACLE_SID environment variables. Normally these variables are set already with an Oracle installation. If not, check with your database administrator, who should be able to provide you with the necessary values.
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.