微信公众号登录

      
public function getWechatOpenid()
{
   $appid = trim($this->result["sites"]["appid"]); 
   $secret = trim($this->result["sites"]["appsecret"]); 
   $code = $_GET['code'];//获取code
   $url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=".urlencode("http://".$_SERVER["HTTP_HOST"]."/".$_SERVER["REQUEST_URI"])."&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";
   if(!$code)header("Location: $url");
   $get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code';
   $ch = curl_init();
   curl_setopt($ch,CURLOPT_URL,$get_token_url);
   curl_setopt($ch,CURLOPT_HEADER,0);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );
   curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
   $res = curl_exec($ch);
   curl_close($ch);
   $json_obj = json_decode($res,true);
   //根据openid和access_token查询用户信息
   $access_token = $json_obj['access_token'];
   $openid = $json_obj['openid'];
   $get_user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';
    
   $ch = curl_init();
   curl_setopt($ch,CURLOPT_URL,$get_user_info_url);
   curl_setopt($ch,CURLOPT_HEADER,0);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );
   curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
   $res = curl_exec($ch);
   curl_close($ch);
   //解析json
   $userinfo = json_decode($res,true);
   if(!empty($openid))
       {
          $sql = "SELECT * FROM ".get_table("customers")." WHERE openid='$openid'";
          $rs = $this->mDb->getRow($sql);
          if($rs)
          {
             $_SESSION["login_user"] = $rs;
          }
          else 
          {
             //注册微信临时用户
             
             $sql = "INSERT INTO ".get_table("customers")." SET openid='$openid',
                                             nickname='".$userinfo["nickname"]."',
                                             city='".$userinfo["city"]."',
                                             province='".$userinfo["province"]."',
                                             headimgurl='".$userinfo["headimgurl"]."',
                                             truename='微信注册用户',createdate=now(),client_id=".$this->result["sites"]["client_id"];
             $this->mDb->execute($sql);
             $id = $this->mDb->Insert_ID();
             $sql = "SELECT * FROM ".get_table("customers")." WHERE id=$id";
             $rs = $this->mDb->getRow($sql);
             $_SESSION["login_user"] = $rs;
         //die();
             //print_r($userinfo);
             
          }
          $_SESSION["login_user"]["headimgurl"] = $userinfo["headimgurl"];
      $_SESSION["login_user"]["nickname"] = $userinfo["nickname"];
      $_SESSION["login_user"]["province"] = $userinfo["province"];
      $_SESSION["login_user"]["city"] = $userinfo["city"];
      $this->result["login_user"] = $_SESSION["login_user"];
      $this->result["openid"] = $openid;
       }
       else
       {
          //header("Location: /login.html?baseurl=".urlencode($_SERVER["REQUEST_URI"]));exit();
       }
   
   //print_r($userinfo); 

   //die();
}