This application has the following requirements:
Your Oracle Database must be up and running.
The SCOTT account is unlocked with password tiger, and has CREATE, RESOURCE, and CTXAPP privileges. See Oracle Database SQLJ Developer's Guide for a connection example.
You have the Oracle PL/SQL gateway running. See Oracle Database Development Guide for complete information about setting up the PL/SQL gateway and developing PL/SQL web applications.
You have a Web server such as Apache up and running and correctly configured to send requests to Oracle Database. See Oracle Database 2 Day + PHP Developer's Guide for information about installing Apache HTTP Server.