PayPal \ Types \ AP \ PayResponse对象 （ [responseEnvelope] => PayPal \ Types \ Common \ ResponseEnvelope对象 （ [时间戳记] => 2018-10-05T01：26：51.806-07：00 [ack] =>失败 [correlationId] => 60e374f3a7daa [内部版本] => 48631621 ）
[payKey] =>
[paymentExecStatus] =>
[payErrorList] =>
[paymentInfoList] =>
[sender] =>
[defaultFundingPlan] =>
[warningDataList] =>
[error] => Array
(
[0] => PayPal\Types\Common\ErrorData Object
(
[errorId] => 580022
[domain] => PLATFORM
[subdomain] => Application
[severity] => Error
[category] => Application
[message] => Invalid request parameter: requestEnvelope cannot be null
[exceptionId] =>
[parameter] => Array
(
[0] => PayPal\Types\Common\ErrorParameter Object
(
[name] =>
[value] => requestEnvelope
)
[1] => PayPal\Types\Common\ErrorParameter Object
(
[name] =>
[value] => null
)
)
)
)
）