https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/Wechat_webpage_authorization.html

网页通过重定向获取用户openid, 第一次重定向scope = snsapi_base, 随后第二次 scope = snsapi_userinfo

两次重定向得到的 openid 不一样：

[06-03 18:33:59][info] Oauth Uri: https://gold4y.com/trade_show.php?stck_id=100&user_id=2001 db_wchatUtils.php 134

[06-03 18:33:59][info] WXSESSION: redirect header B: https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxbeda9f9bed3ecefc&redirect_uri=https%3A%2F%2Fgold4y.com%2Ftrade_show.php%3Fstck_id%3D100%26user_id%3D2001&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect wxqry_common.php 382

[06-03 18:34:00][info] WXSESSION: 0 code state get web actken result: {"access_token":"92_XkCeOUCE7bpkVGe8ipus8kJyA04JBEg0bwp8c49Ee0qcBsNGIH8M-QWRVKSFjd0Os-I3tQS1ugEDG9TDTIilElF8d_ROWIiRkgjapnCZxxw","expires_in":7200,"refresh_token":"92_Gt5cioU2etMnTBUhR__D1_3JMwi6t-8bWhtj8WAKYg7zvxpTNFThJbixiHmQQYUZmLfjxDJ-2kNwERLfLGFC7c1JHcCnpsf3K5ym-jsiugs","openid":"oAhyMxHtb6NXMHmdmHDLH2wPuWRQ","scope":"snsapi_base"} wxqry_common.php 238

[06-03 18:34:15][info] WXSESSION: redirect header B: https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxbeda9f9bed3ecefc&redirect_uri=https%3A%2F%2Fgold4y.com%2Ftrade_show.php%3Fstck_id%3D100%26user_id%3D2001&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect wxqry_common.php 382

[06-03 18:34:16][info] WXSESSION: 0 code state get web actken result: {"access_token":"92_lSfqOwjLgymCmxshx1q40FwGHm6j2vZ0TGQV6kVNubVOZaU9IhreSRVz_XHnvpLothwWJqjp3HLXcKrZ_YiObUGRVvNuVFQPIJxKx9fLb9g","expires_in":7200,"refresh_token":"92_Tr0mAVbeLaItug0gyFgsCru6oeq_mDEeregybvfmEv-JOiCxjnWCquL6EdYi8csJR1IlOIsE5LaPnGNvsjJr4gxd38NpTp5FZvlQ4YOKSWM","openid":"oAhyMxLgY8uqI9D8CLNs8JCd-D4g","scope":"snsapi_userinfo","unionid":"oUC5mwsz5awQuohODrcj69xwCBqs","is_snapshotuser":1} wxqry_common.php 238