Gennady Feldman has posted the second part of his install instructions for setting up the Oracle Instant Client (11g) and the Oracle OCI8 drivers in PHP.
This is part 2 of my installation instructions. This is my attempt to provide an updated and simplified reference. I am leaving Part 1 as is, because that part can also be useful.
This updated tutorial shows the steps to installing 11g (versus 10g in the previous example) including the packages you'll need, the commands to make it work and a PEAR version of the install if you choose to go that route.