extern script returns 500, wordpress

[konadave]

A while back I developed an extern script for a client running drupal/civicrm 4.1. After switching to wordpress, this script now returns error code 500. The following simple example demonstrates the problem.


// http://example.com/wp-content/plugins/civicrm/civicrm/extern/example.php

session_start();

require_once '../civicrm.config.php';
require_once 'CRM/Core/Config.php';
require_once 'api/api.php';

$config = CRM_Core_Config::singleton(); // this is where the 500 happens

echo 'Hello, World!'; // comment out the previous statement and this gets executed


All of the standard extern scripts initialize the same way, and they return 500 too when accessed directly. There is something different about how this works under wordpress, and I haven't been able to find the answer yet. Could somebody please clue me in to the issue here?

I appreciate any help you can offer. Thanks.

[konadave]

The extern scripts are terminating on a fatal PHP error for missing functions. Client is running wordpress 4.0 with civi 4.1, which after further investigation are not compatible. Advised the need to upgrade to 4.3 or higher.