Chris Jones has pointed out a new wiki page that's been set up as a more centralized resource for frequently asked questions about PHP and Oracle.
I've updated the old Oracle PHP FAQ and the Oracle PHP Troubleshooting FAQs that were hosted by Oracle Technology Network (OTN). We've redirected the old FAQ pages to a new wiki page: http://wiki.oracle.com/page/PHP+Oracle+FAQ with the updated content. Feel free to create an account and make updates. Hosting the FAQ on a wiki seems appropriate because PHP is open source and grows by the value of everyone's contributions.
Questions so far include some of the basics (connecting, querying, etc) and a few more complicated issues like pre-fetching, LOBS and new information for using the Zend Server to connect to your Oracle databases.