微信支付JSAPI php版本 在获取到openid或 postXmlCurl时返回了空
首先在一开始，是能获取到openid的，但到了到了curl发送xml数据到统一下单接口时，curl返回的data为空。然后报了 “签名错误”。求大神指教，V3版本，php。
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首先在一开始，是能获取到openid的，但到了到了curl发送xml数据到统一下单接口时，curl返回的data为空。然后报了 “签名错误”。求大神指教，V3版本，php。
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