php微信网页授权获取用户信息
配置回调域名：
1. 引导用户进入授权页面同意授权，获取code
2. 通过code换取网页授权access_token（与基础支持中的access_token不同）
3. 如果需要，开发者可以刷新网页授权access_token，避免过期
4. 通过网页授权access_token和openid获取用户基本信息
先自己建立两个文件: index.php 和 getUser.php
代码实例
index.php如下:
1 <?php 2 $appid = "公众号的appid"; 3 $REDIRECT_URI='回调链接'; 4 $scope='snsapi_base'; 5 // $scope='snsapi_userinfo';//需要授权 6 $url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$appid.'&redirect_uri='.urlencode($REDIRECT_URI).'&response_type=code&scope='.$scope.'&state=STATE#wechat_redirect'; 7 header("Location:".$url); 8 ?>
getUser.php如下:
1 <?php 2 $appid = "公众号appid"; 3 $secret = "公众号secret"; 4 //获取code 5 $code = $_GET["code"]; 6 //获取access_token 7 $get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code'; 8 9 $ch = curl_init(); 10 curl_setopt($ch,CURLOPT_URL,$get_token_url); 11 curl_setopt($ch,CURLOPT_HEADER,0); 12 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 ); 13 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); 14 $res = curl_exec($ch); 15 curl_close($ch); 16 $json_obj = json_decode($res,true); 17 18 //根据openid和access_token查询用户信息 19 $access_token = $json_obj['access_token']; 20 $openid = $json_obj['openid']; 21 $get_user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN'; 22 $ch = curl_init(); 23 curl_setopt($ch,CURLOPT_URL,$get_user_info_url); 24 curl_setopt($ch,CURLOPT_HEADER,0); 25 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 ); 26 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); 27 $res = curl_exec($ch); 28 curl_close($ch); 29 //解析json 30 $user_obj = json_decode($res,true); 31 $_SESSION['user'] = $user_obj; 32 print_r($user_obj); 33 ?>
