After one of the major database company (
SAP recently launched a new
PHP Development Forum),
Oracle launches new
PHP Developer section on the
OTN.
Among other things you can read this interesting guides:

Installing Apache, PHP, JDeveloper, and the PHP Extension on Linux

Installing PHP and the Oracle 10g Instant Client for Linux and Windows

Installing Oracle, PHP, and Apache on Linux

Installing Oracle, PHP, and Apache on Windows 2000/XP

Set Up Oracle Database 10g and PHP on Mac OS X
Is great to see that large companies are becoming aware that PHP has moved from a thriving open source project to an enterprise solution for web applications.