微信页面授权登陆

[lovecn]

from http://everyding.github.io/2016/04/08/weixin-auth/
首先登陆微信公众平台，点击左侧菜单 开发 -> 接口权限，找到‘网页授权获取用户基本信息 点击修改，然后填上需要授权的域名
1.获取code

只需要访问：https://open.weixin.qq.com/connect/oauth2/authorize?appid=您的appid&redirect_uri=授权地址成功后跳转URL&response_type=code&scope=snsapi_userinfo&state=1&connect_redirect=1#wechat_redirect

2.通过code获取access_token，再根据access_token获取userinfo

//通过code获取access_token
$code = $_GET['code'];
$appid = "您的appid";
$appsecret = "您的appsecret";
$url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$appid&secret=$appsecret&code=$code&grant_type=authorization_code";
$result = https_request($url);
$jsoninfo = json_decode($result, true);

//根据access_token获取userinfo
$openid = $jsoninfo["openid"];
$access_token = $jsoninfo["access_token"];
$url1 = "https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=$openid&lang=zh_CN";
$result1 = https_request($url1);
$jsoninfo1 = json_decode($result1, true);

function https_request($url, $data = null)
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
if (!empty($data)) {
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
}
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($curl);
curl_close($curl);
return $output;
}

//结果返回userinfo
echo json_encode($jsoninfo1);