Yes, in addition to oci, pdo_oci is also enabled.

Below, is a sample connection you can use with pdo_oci:

<?php
$db = "//hostname/service";
$user = "username";
$pass = "password";
try{
    $conn = new PDO("oci:dbname=".$db,$user,$pass);
}catch(PDOException $e){
    echo ($e->getMessage());
}
?>

For oci connections, please see our oci FAQ:

http://faq.enciva.com/content/6/3/en/php-oracle-connections-oci.html