The main advantage of PHP is that you do not need OAS in order to connect with ORACLE DB.
Save your money!!!!!
DEVELOP CHEAP SOLUTIONS FOR YOUR CUSTOMERS!!!!
IF YOU ALREADY HAVE OAS, PHP IS USELESS BECAUSE YOU CAN WRITE PL/SQL (ISNTEAD OF PHP) WICH IS MORE STABLE, MORE SECURE, MORE FLEXIBLE AND MUCH MORE FAST!! FROM ANY SCRIPTING LANGUAGE SUCH AS "PHP" (EVEN JAVA)
BUT IF YOU NEED TO CONFIGURE OAS WITH PHP
YOU NEED TO CREATE AN APPLICATION AND A CARTRIDGE
(I THINK A "CWEB" BUT 'IM NOT SURE.. DEPENTING THE VERSION OF YOUR OAS)
I'LL TRY IT AND I'LL NOTICE YOU!!!
KEEP USING APACHE!!!!