// Format for output
$sOutputFormat = $oParams->getSet('format', array('html', 'xml', 'json', 'jsonv2', 'geojson', 'geocodejson'), 'xml');
// Format for output
$sOutputFormat = $oParams->getSet('format', array('html', 'xml', 'json', 'jsonv2', 'geojson', 'geocodejson'), 'xml');