URL地址：https://api.mch.weixin.qq.com/cgi-bin/mch/customs/customdeclareorder

参数

'appid'=>$data["appid"],

            'mch_id'=>$sec["wxapp"]["mchid"],

            'out_trade_no'=>$order['ordersn'],

            'transaction_id'=>$order['transid'],

            'customs'=>'NINGBO',

            'mch_customs_no'=>'331866003H',