obExtras

<?php
$oneBooking = $modx->getService('onebooking','oneBooking',$modx->getOption('core_path').'components/onebooking/model/onebooking/', $scriptProperties);
if (!($oneBooking instanceof oneBooking)) return '';

$included = array();
if (!empty($scriptProperties['fields'])) {
    $included = explode(',',$scriptProperties['fields']);
    array_walk($included,'trim');
}
$fields = false;
foreach($oneBooking->extras as $name=>$data) {
    if ($included && !in_array($name,$included)) {
        $fields[$name] = '';
    } else {
        $fields[$name] = $data['field'];
    }
}

if ($fields) $modx->setPlaceholders($fields,'ob.');
return '';