1 <?php
 2 /**
 3  * 获取微信用户信息
 4  * @author: Lucky hypo
 5  */
 6 class GetWxUser{    
 7     private $appid = ‘‘;
 8     private $appsecret = ‘‘;
 9    /**
10     * 1、获取微信用户信息，判断有没有code，有使用code换取access_token，没有去获取code。
11     * @return array 微信用户信息数组
12     */
13     public function get_user_all(){
14         if (!isset($_GET[‘code‘])){//没有code，去微信接口获取code码
15             $callback = ‘http://‘.$_SERVER[‘HTTP_HOST‘].$_SERVER[‘PHP_SELF‘];//微信服务器回调url，这里是本页url
16             $this->get_code($callback);
17         } else {//获取code后跳转回来到这里了
18             $code = $_GET[‘code‘];
19             $data = $this->get_access_token($code);//获取网页授权access_token和用户openid
20             $data_all = $this->get_user_info($data[‘access_token‘],$data[‘openid‘]);//获取微信用户信息      
21             return $data_all;
22         }
23     }
24    /**
25     * 2、用户授权并获取code
26     * @param string $callback 微信服务器回调链接url
27     */
28     private function get_code($callback){
29         $appid = $this->appid;
30         $scope = ‘snsapi_userinfo‘;
31         $state = md5(uniqid(rand(), TRUE));//唯一ID标识符绝对不会重复
32         $url = ‘https://open.weixin.qq.com/connect/oauth2/authorize?appid=‘ . $appid . ‘&redirect_uri=‘ . urlencode($callback) .  ‘&response_type=code&scope=‘ . $scope . ‘&state=‘ . $state . ‘#wechat_redirect‘;
33         header("Location:$url");
34     }    
35    /**
36     * 3、使用code换取access_token
37     * @param string 用于换取access_token的code，微信提供
38     * @return array access_token和用户openid数组
39     */
40     private function get_access_token($code){
41         $appid = $this->appid;
42         $appsecret = $this->appsecret;    
43         $url = ‘https://api.weixin.qq.com/sns/oauth2/access_token?appid=‘ . $appid . ‘&secret=‘ . $appsecret . ‘&code=‘ . $code . ‘&grant_type=authorization_code‘;
44         $user = json_decode(file_get_contents($url));
45         if (isset($user->errcode)) {
46             echo ‘error:‘ . $user->errcode.‘<hr>msg  :‘ . $user->errmsg;exit;
47         }
48         $data = json_decode(json_encode($user),true);//返回的json数组转换成array数组
49         return $data;
50     }    
51   /**
52     * 4、使用access_token获取用户信息
53     * @param string access_token
54     * @param string 用户的openid
55     * @return array 用户信息数组
56     */
57     private function get_user_info($access_token,$openid){
58         $url = ‘https://api.weixin.qq.com/sns/userinfo?access_token=‘ . $access_token . ‘&openid=‘ . $openid . ‘&lang=zh_CN‘;
59         $user = json_decode(file_get_contents($url));
60         if (isset($user->errcode)) {
61             echo ‘error:‘ . $user->errcode.‘<hr>msg  :‘ . $user->errmsg;exit;
62         }
63         $data = json_decode(json_encode($user),true);//返回的json数组转换成array数组
64         return $data;
65     }    
66 }
67 ?>