hedera-web/rest/misc/production.php

<?php

class Production extends Vn\Web\JsonRequest
{
	const PARAMS = ['deviceId'];

	function run ($db)
	{
        $row = $db->getObject (
            'SELECT displayText FROM vn.routeGate WHERE deviceId = #',
            [$_REQUEST['deviceId']]
        );

        if (!isset($row))
            throw new Vn\Lib\UserException ('Device not found');

        return $row->displayText;
    }
}