<xml> <action_type>ADD</action_type> <appid>wx8xxxxx083e2a9c</appid> <customs>ZHENGZHOU_BS</customs> <mch_customs_no>311766xxxxx</mch_customs_no> <mch_id>16811xxxxx1</mch_id> <out_trade_no>202404251173904329002000</out_trade_no> <transaction_id>420000243xxxx159xxx801345</transaction_id> <sign>CB96CC42EE25160ECE6732002675CBF2</sign> </xml> 在线签名都是通过的，但就是报签名验证失败，我是用PHP CURL来调用接口的