Install Guides for PHP, APACHE and Oracle

Windows
http://www.oracle.com/technology/tech/php/htdocs/inst_php_apache_windows.html
Linux
http://www.oracle.com/technology/tech/php/htdocs/inst_php_apache_linux.html

Oracle Database 10g Express Edition
10.2
http://www.oracle.com/technology/products/database/xe/

Apache HTTP Server
2.0.58
http://httpd.apache.org/download.cgi

PHP Hypertext Processor
5.1.3
http://www.php.net/downloads.php

Underground Guide for PHP n Oracle
http://www.oracle.com/technology/tech/php/pdf/underground-php-oracle-manual.pdf

Other PHP - Oracle Install Guides
http://www.oracle.com/technology/tech/php/index.html