The DB::connect() function in file pear/DB/oci8.php in php-4.1.2 and php-4.2.0RC2 cannot connect to an Oracle database if one follows the order for the arguments for this function.  In this function, $dsninfo['hostspec'] is passed into OCILogon().  The correct parameter should be $dsninfo['database'].

The following output of diff shows a fix:

94c94
<     $database = $dsninfo['database'];
---
>     $hostspec = $dsninfo['hostspec'];
98,99c98,99
<     if ($database) {
<         $conn = @$connect_function($user,$pw,$database);
---
      if ($hostspec) {
>         $conn = @$connect_function($user,$pw,$hostspec);