SimpleXMLElement Object ( [method] => https://rest.reserve-online.net/availability/demo [http_method] => GET [http_code] => 400 [error_code] => INVALID_PARAM [error_msg] => Invalid checkin date specified. Please provide a future date. [params] => SimpleXMLElement Object ( [param] => Array ( [0] => SimpleXMLElement Object ( [type] => URL [name] => checkin [value] => 2017-05-20 ) [1] => SimpleXMLElement Object ( [type] => URL [name] => nights [value] => 2 ) ) ) [data] => SimpleXMLElement Object ( ) )