技术要点（具体开发代码，在（公正年报H5）中实现

１、申请好公众号，获取AppID(公众号ID)AppSecret(公众号密钥)

 2、申请微信支付账户，获取(商户号)和(密钥)

 3、在微信支付账户中绑定公众号，然后在公众号中同意授权绑定，使两者产生关联

代码实现

一、h5页面，调用方法获取code

public function getGzhCode()
{$appid = 'xxx';//公众号appid$redirect_uri = urlencode('https://abcd/me'); // 用户同意授权后，能够跳转的回调链接地址// 获取code$url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=$redirect_uri&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";header('Location: ' . $url);exit();
}

二、在上面设置的回调页面me中（通过code获取access_token和openId）,这个openId就是用户在公众号中的身份ID，支付的时候通过这个ID来实现

if (isset($_GET['code'])) {$appid = 'xxx';//公众号appid$appsecret = 'xxx';//公众号secret$code = $_GET['code'];//获取回调传过来的code，通过code再获取token以及openId$url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$appid&secret=$appsecret&code=$code&grant_type=authorization_code";$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);$result = curl_exec($ch);curl_close($ch);$data = json_decode($result, true);$openId = $data['openid']; // 用户的openidSession::set('openId',$openId);//保存openid到session中
    //判断用户是否已存在，不存在则先保存新用户记录    $userData = GznbUserModel::where('openId',$openId)->find();if(empty($userData)){$save['openId'] = $openId;GznbUserModel::create($save);$userData = GznbUserModel::where('openId',$openId)->find();}$this->assign('userData',$userData);return $this->view->fetch();
}

至此，已经完成了获取用户openId和保存记录，用户下次登录或支付时，通过这个openId来锁定身份

三、微信公众号－JSAPI支付实现

1、生成微信公众号-JSAPI支付参数，传递给Ｈ５页面做为config

public function form()
{if(request()->isPost()){//支付页面，提交订单，保存订单记录$openId = Session::get('openId');$status = 0;$trade_no = '';if($openId){$data = $this->request->param();$userData = GznbUserModel::where('openId',$openId)->find();if($userData){$data['userId'] = $userData['id'];$data['orderNumber'] = $this->getOrderNumber();//生成随机订单号,和回调时对应$data['trade_no'] = $data['orderNumber'];$res = GznbOrderModel::create($data);if($res){$trade_no = $data['orderNumber'];$status =