支付宝 扫码支付 集成

https://docs.open.alipay.com/194/106078/

创建应用并签约当面付

https://docs.open.alipay.com/194/105170#s3

https://docs.open.alipay.com/194/105203 当面付API列表

https://docs.open.alipay.com/api_1/alipay.trade.precreate/

sdk

https://docs.open.alipay.com/54/103419

不是条码支付！

alipay.trade.precreate

[code] => 40004 [msg] => Business Failed [sub_code] => ACQ.INVALID_PARAMETER [sub_msg] => 参数无效 )

看下你的变量是不是掉了$

正常返回

[alipay_trade_precreate_response] => stdClass Object ( [code] => 10000 [msg] => Success [out_trade_no] => 20171231660466374 [qr_code] => https://qr.alipay.com/baxonitjwda2075 ) [sign] => HrC2IwWPQIJ2fKp8JYLCo13jY8dV9yCW

异步通知

https://docs.open.alipay.com/194/103296/

程序执行完后必须打印输出“success”（不包含引号）。如果商户反馈给支付宝的字符不是success这7个字符，支付宝服务器会不断重发通知