本文介绍如何获得微信公众平台关注用户的基本信息，包括昵称、头像、性别、国家、省份、城市、语言。
在本文中，特别要注意的是有两个不同的Access Token，他们产生的方式不一样，一种是使用AppID和AppSecret获取的access_token，一种是OAuth2.0授权中产生的access_token，分别称为全局Access Token和授权Access Token。
一、通过全局Access Token获取用户基本信息
1. 用户关注以及回复消息的时候，均可以获得用户的OpenID
<xml><ToUserName><![CDATA[gh_b629c48b653e]]></ToUserName><FromUserName><![CDATA[ollB4jv7LA3tydjviJp5V9qTU_kA]]></FromUserName><CreateTime>1372307736</CreateTime><MsgType><![CDATA[event]]></MsgType><Event><![CDATA[subscribe]]></Event><EventKey><![CDATA[]]></EventKey>
</xml>2. 然后使用access_token接口，请求获得全局Access Token
https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET
https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESS_TOKEN&openid=OPENID
{"subscribe": 1,"openid": "ol9-ExGGSKSSLZ8zhtCkCmRXNdYg","nickname": "drt9527","sex": 1,"language": "zh_CN","city": "郑州","province": "河南","country": "中国","headimgurl": "http://wx.qlogo.cn/mmopen/JcDicrZBlREhnNXZRudod9PmibRkIs5K2f1tUQ7lFjC63pYHaXGxNDgMzjGDEuvzYZbFOqtUXaxSdoZG6iane5ko9H30krIbzGv/0","subscribe_time": 1489960805
}二、通过OAuth2.0方式弹出授权页面获得用户基本信息
1. 首先配置回调域名
2. 构造请求url如下：
https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx8888888888888888&redirect_uri=http://credit.zzpmi.cn/oauth2.php&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirectscope=snsapi_userinfo 表示应用授权作用域为请求用户信息★ 如果使用别人的AppID和AppSecret，那么获得的OpenID是那个有高级接口权限的服务号的，这里可以通过消息回复，获取本公众账号下的OpenID，带入回调中，与另一个OpenID进行关联也可以使用开放平台的UnionID功能来得到用户在自己账号下的OpenID
https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx8888888888888888&redirect_uri=http://credit.zzpmi.cn/oauth2.php?userid=oc7tbuPA9BgUCLADib5nB3k2KWWg&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect
http://credit.zzpmi.cn/oauth2.php?code=00b788e3b42043c8459a57a8d8ab5d9f&state=1
或者 http://credit.zzpmi.cn/oauth2.php?userid=oc7tbuPA9BgUCLADib5nB3k2KWWg&code=00b788e3b42043c8459a57a8d8ab5d9f&state=14. 再使用code换取oauth2的授权access_token
url如下：
https://api.weixin.qq.com/sns/oauth2/access_token?appid=wx8888888888888888&secret=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa&code=00b788e3b42043c8459a57a8d8ab5d9f&grant_type=authorization_code
{"access_token": "OezXcEiiBSKSxW0eoylIeAsR0GmYd1awCffdHgb4fhS_KKf2CotGj2cBNUKQQvj-G0ZWEE5-uBjBz941EOPqDQy5sS_GCs2z40dnvU99Y5AI1bw2uqN--2jXoBLIM5d6L9RImvm8Vg8cBAiLpWA8Vw","expires_in": 7200,"refresh_token": "OezXcEiiBSKSxW0eoylIeAsR0GmYd1awCffdHgb4fhS_KKf2CotGj2cBNUKQQvj-G0ZWEE5-uBjBz941EOPqDQy5sS_GCs2z40dnvU99Y5CZPAwZksiuz_6x_TfkLoXLU7kdKM2232WDXB3Msuzq1A","openid": "oLVPpjqs9BhvzwPj5A-vTYAX3GLc","scope": "snsapi_userinfo,"
}5. 再使用授权Access Token获取用户信息
url如下：
https://api.weixin.qq.com/sns/userinfo?access_token=OezXcEiiBSKSxW0eoylIeAsR0GmYd1awCffdHgb4fhS_KKf2CotGj2cBNUKQQvj-G0ZWEE5-uBjBz941EOPqDQy5sS_GCs2z40dnvU99Y5AI1bw2uqN--2jXoBLIM5d6L9RImvm8Vg8cBAiLpWA8Vw&openid=oLVPpjqs9BhvzwPj5A-vTYAX3GLc{"openid": "oLVPpjqs9BhvzwPj5A-vTYAX3GLc","nickname": "drt9527","sex": 1,"language": "zh_CN","city": "郑州","province": "河南","country": "中国","headimgurl": "http://wx.qlogo.cn/mmopen/utpKYf69VAbCRDRlbUsPsdQN38DoibCkrU6SAMCSNx558eTaLVM8PyM6jlEGzOrH67hyZibIZPXu4BK1XNWzSXB3Cs4qpBBg18/0","privilege": []
}三、通过OAuth2.0方式不弹出授权页面获得用户基本信息
1. 配置回调域名
2. 构造请求url如下：
https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx8888888888888888&redirect_uri=http://credit.zzpmi.cn/oauth2.php&response_type=code&scope=snsapi_base&state=1#wechat_redirect
scope=snsapi_base 表示应用授权作用域为 不弹出授权页面，直接跳转，只获取用户openid3. 返回回调页面如下
http://credit.zzpmi.cn?code=02a9bed29b2185a9f0ed3a48fe56e700&state=1这里获得到了code
4. 再使用code获取OpenID
url如下：
https://api.weixin.qq.com/sns/oauth2/access_token?appid=wx8888888888888888&secret=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa&code=02a9bed29b2185a9f0ed3a48fe56e700&grant_type=authorization_code{"access_token": "OezXcEiiBSKSxW0eoylIeAsR0GmYd1awCffdHgb4fhS_KKf2CotGj2cBNUKQQvj-oJ9VmO-0Z-_izfnSAX_s0aqDsYkW4s8W5dLZ4iyNj5Y6vey3dgDtFki5C8r6D0E6mSVxxtb8BjLMhb-mCyT_Yg","expires_in": 7200,"refresh_token": "OezXcEiiBSKSxW0eoylIeAsR0GmYd1awCffdHgb4fhS_KKf2CotGj2cBNUKQQvj-oJ9VmO-0Z-_izfnSAX_s0aqDsYkW4s8W5dLZ4iyNj5YBkF0ZUH1Ew8Iqea6x_itq13sYDqP1D7ieaDy9u2AHHw","openid": "oLVPpjqs9BhvzwPj5A-vTYAX3GLc","scope": "snsapi_base"
}
https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret
{"access_token": "NU7Kr6v9L9TQaqm5NE3OTPctTZx797Wxw4Snd2WL2HHBqLCiXlDVOw2l-Se0I-WmOLLniAYLAwzhbYhXNjbLc_KAA092cxkmpj5FpuqNO0IL7bB0Exz5s5qC9Umypy-rz2y441W9qgfnmNtIZWSjSQ","expires_in": 7200
}
https://api.weixin.qq.com/cgi-bin/user/info?access_token=".$ACCESS_TOKEN."&openid=".$openid."&lang=zh_CN
{"subscribe": 1,"openid": "oLVPpjqs2BhvzwPj5A-vTYAX4GLc","nickname": "drt9527","sex": 1,"language": "zh_CN","city": "郑州","province": "河南","country": "中国","headimgurl": "http://wx.qlogo.cn/mmopen/JcDicrZBlREhnNXZRudod9PmibRkIs5K2f1tUQ7lFjC63pYHaXGxNDgMzjGDEuvzYZbFOqtUXaxSdoZG6iane5ko9H30krIbzGv/0","subscribe_time": 1386160805
}成功获得用户基本信息。
这种适合已经有OAuth2.0网页授权的服务号在网页中使用，且不会弹出“微信登录”页面。减少给用户的打扰。
注：本文内容参考方倍工作室相关信息。
