array (
  'rules' => 
  array (
    'rules_1' => 
    array (
      '#type' => 'rule',
      '#set' => 'event_cron',
      '#label' => 'Unpublish past events',
      '#active' => 1,
      '#weight' => '0',
      '#status' => 'custom',
      '#conditions' => 
      array (
      ),
      '#actions' => 
      array (
        0 => 
        array (
          '#weight' => 0,
          '#type' => 'action',
          '#settings' => 
          array (
            'code' => '$field_dates_info = content_database_info(content_fields(\'field_dates\'));
$results = db_query("SELECT n.nid FROM {node} n INNER JOIN {". $field_dates_info[\'table\'] ."} c ON n.vid = c.vid WHERE type=\'event\' AND status=1 AND ". $field_dates_info[\'columns\'][\'value\'][\'column\'] ." < now()"); 
while ($result = db_fetch_object($results)) {
  $node = node_load($result->nid);
  $node->status = 0;
  node_save($node);
}
',
            'vars' => 
            array (
            ),
          ),
          '#name' => 'rules_action_custom_php',
          '#info' => 
          array (
            'label' => 'Unpublish past events',
            'label callback' => false,
            'module' => 'PHP',
            'eval input' => 
            array (
              0 => 'code',
            ),
          ),
        ),
      ),
    ),
  ),
)