php微信授權認證獲取使用者基本資訊


拿到code值
public function snsapi_userinfo(){
    $appid = $this->config->item('wechat_appid','app/config');

    $redirect_uri = urlencode ( 'http://tp.ihouser.cn/weixin/M_wechat/getOauthAccessToken' );//將字串以 URL 編碼。
    $url ="https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=$redirect_uri&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect";
    header("Location:".$url);
}

用code值獲取openid及使用者基本資訊
public function getOauthAccessToken(){
    $appid = $this->config->item('wechat_appid','app/config');
    $secret = $this->config->item('wechat_appsecret','app/config');
    $code = isset($_GET['code'])?$_GET['code']:'';
    if (!$code) return false;

    $result = file_get_contents('https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code');
    if ($result)
    {
        $json = json_decode($result,true);
        if (!$json || !empty($json['errcode'])) {
            $this->errCode = $json['errcode'];
            $this->errMsg = $json['errmsg'];
            return false;
        }
        $this->user_token = $json['access_token'];
        $token = $json['access_token'];
        $openid = $json['openid'];
        $user = file_get_contents('https://api.weixin.qq.com/sns/userinfo?access_token='.$token.'&openid='.$openid.'&lang=zh_CN');
        $user1 = json_decode($user,true);
        $openid = $user1['openid'];
        $username = $user1['username'];

        header("Location:".'http://tp.ihouser.cn/weixin/C_vote/index_list?openid='.$openid.'&username='.$username);
    }
    return false;
}