我从temboo-fitbitapi获得这个对象数组作为响应。这是print_r($result)输出：
Fitbit_Statistics_GetTimeSeriesByDateRange_Results Object ( [outputArray:protected] => Array ( [Response] => {"activities-log-steps":[{"dateTime":"2015-12-30","value":"129"}]} ) [lowercaseKeyMap:protected] => Array ( [response] => Response ) )
如何访问此对象的value属性？
我发现temboo有访问结果的方法：
getTimeSeriesByDateRangeResults->getResponse()
https://github.com/temboo/php-examples/blob/master/FacebookMealsApp/php-sdk/src/library/temboo.fitbit.php#L3368
只做
$result->getResponse();