librenms-librenms/includes/services.inc.php

<?php

function discover_service($device, $service)
{
  if (! dbFetchCell("SELECT COUNT(service_id) FROM `services` WHERE `service_type`= ? AND `device_id` = ?", array($service, $device['device_id'])))
  {
    add_service($device, $service, "(Auto discovered) $service");
    log_event("Autodiscovered service: type " . mres($service), $device, 'service');
    echo("+");
  }

  echo("$service ");
}

?>