<?php
putenv("ORACLE_SID=XXXX");
putenv("ORACLE_HOME=/oracle/ora92");
putenv("TNS_ADMIN=/oracle/ora92/network/admin");
$username = "test";
$passwd = "test";
$db="(DESCRIPTION=
           (ADDRESS_LIST=
             (ADDRESS=(PROTOCOL=TCP)
               (HOST=BASE)(PORT=1521)
             )
           )
             (CONNECT_DATA=(SERVICE_NAME=xxxx))
     )";
$conn = OCILogon($username,$passwd,$db);
if (!$conn)
{
   echo "Connection failed";
   echo "Error Message: [" . OCIError($conn) . "]";
   exit;
}
else
{
   echo "Connected!";
}
?>