["out_trade_no"]=> string(20) "20200723113725481492"

["out_refund_no"]=> string(20) "20200723113725481492"

["total_fee"]=> int(1)

["refund_fee"]=> int(1)

["appId"]=> string(18) "wxee45d391d2beb973"

["mch_id"]=> string(10) "1574568351"

["nonce_str"]=> string(32) "a2xhj8mu8033igkupyeybz05t36aha6n"

["notify_url"]=> string(48) "http://cww.veelan.cn/block_applet/refundCallback"

["sign"]=> string(32) "15215D36AF455C58FE4324777C804A78"