Look i'm not an expert on this but i've done it a couple of times. First of all you have to edit your php.ini and uncomment the line in the extensions area where there is the oci.dll Then you have to copy this dll from the extensions folder of your php to your windows folder or to your system/system32 folder depending on your windows edition. Restart your apache and then create a simple php script which will talk with your oracle personal edition and run it through your apache.
* if when running the script you get a message saying that it cannot find the required dll then you should edit your php.ini again. Above the extensions area there is a line where the extension dir is defined. Change that according to where you placed your dll.
I hope i helped you a little.
Good Luck!
