How do I connect to Oracle using PDO::__construct().
What I have are the host, port, SID and INSTANCE_NAME.
Looking for information I have founded
CONNECT username@[//]host[:port][/service_name][:server][/instance_name]
at http://docs.oracle.com/cd/E18283_01/network.112/e10836/naming.htm#i498306, but I don't know how to "translate" it to PDO.