Complete Tutorial Four on WeChat Public Account Development

This article introduces the fourth complete tutorial on WeChat public account development. It has certain reference value. Now I share it with everyone. Friends in need can refer to it

because of work needs , in the past two years, there have been many projects on WeChat public accounts and mini programs. That’s why I plan to write a comprehensive production tutorial. Of course, the best tutorial is the documentation of the WeChat work platform. I'm just going to talk about the production process in my work here. I host the source code of all related articles on my own github. Welcome to follow: Address Click to open the link. Let's start our tutorial. In this section we describe the production of web page authorization: this time we use the WeChat public account test account to complete this function.

1. Web page authorization:

WeChat document:

Set callback domain :

##1.1: Two methods of web page authorization:

Snsapi_base

The method can only obtain the user's openID It belongs to silent authorized users and has no awareness

Snsapi_userinfo

method can obtain the user's basic information, but requires manual authorization by the user

1.2:

Aboutaccess_tokenInstructions:

#access_token## used in authorization of the entire web page #Can only be used during the web page authorization process. For access_token used by other interfaces, the value obtained from the basic interface needs to be used. 1.3

Entire web page authorization process:

##1

Step one: User agrees to authorize, obtain

code(

Need to guide the user to open the authorization interface)2 Step 2: Pass

code

In exchange for web page authorizationaccess_token(The user agrees to authorize WeChat and will request the set callback address) 3 Step 3: Refresh

access_token

(if necessary)4 Step 4: Pull user information

(

requires scope to be snsapi_userinfo)2. Code implementation: 2.1 Modify the custom menu:

The jump address function is as follows:

2.2

The first step is to implement the boot jump

The code is as follows:

// 引导跳转的方式
public function auth($action_name, $controller_name)
{
//    var_dump($action_name, $controller_name);
$bak = urlencode("http://www.xiaoziheng.club/home/".$controller_name."/".$action_name);
$redirecr_uri =urlencode('http://www.xiaoziheng.club/home/demo/getcode?bak='.$bak);
$url ="https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$this->appid."&redirect_uri="
           .$redirecr_uri."&response_type=code&scope=snsapi_userinfo&state=".time()."#wechat_redirect";
header('Location:'.$url);
}

The two parameters are: the controller and method of the jump address:

public function __construct(Request $request)
{
parent::__construct();
$this->accessToken = get_access_token();
//获得方法    
$action_name =$request->action();
//获得控制器   
$controller_name = $request->controller();
if(!cookie('user')){
if($action_name !='getcode'){
$this->auth($action_name, $controller_name);
}
}
}

In the boot method, we will get the value of getcode: The function is as follows: It contains the implementation methods of the second, third and fourth steps. ：

##

public function getcode(Request $request)
{
$code = $_GET['code'];
if(!$code){
echo '微信服务器故障';
exit;
}
// 第二步：通过code换取网页授权中的access_token
$url ="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$this->appid."&secret=".$this->appsecret
                         ."&code=".$code."&grant_type=authorization_code";
$result =file_get_contents($url);
$result = json_decode($result,true);
if(!$result){
echo '微信服务器故障';
exit;
}
// 第三步：获取用户的基本信息，此操作仅限scope为snspai_userinfo
$url ="https://api.weixin.qq.com/sns/userinfo?access_token=".$result['access_token']."&openid="
                       .$result['openid']."&lang=zh_CN";
$result =file_get_contents($url);
$result = json_decode($result,true);
$userInfo = db('user')->where("openid","=",$result['openid'])->find();
if(!$userInfo){
echo '操作数据可以';
$data = [
'nickname' =>$result['nickname'] ,
'openid'=>$result['openid'],
'headimgurl'=>$result['headimgurl']
];
db('user')->insert($data);
$userInfo = $result;
}
// 第四步骤：跳转回跳转地址
$bak = $_GET['bak'];
cookie('user',$userInfo);
header('Location:'.$bak);
}

During the implementation process, we will conduct the requested user information When the operation of storing the database comes in again, it will be judged whether there is a value in the database:

I set up a server on Alibaba Cloud, and the data obtained is as follows:

The result of web page authorization is as shown in the figure:

##Note Points and key points:

This is why my above test results do not display the confirmation prompt box, and there is a need to check each parameter in the interface. Ok, I understand. The meaning of each parameter, and the understanding of WeChat’s

OAuth2.0 protocol: Here is a good article about this protocol: Click to open the link

In fact, as long as you read WeChat’s documentation carefully, If you are careful and careful when developing, you can basically develop a WeChat official account. In the next section, we will talk about the knowledge points about uploading resource files...

Related recommendations:

Complete Tutorial Three for WeChat Public Account Development

Complete Tutorial Two for WeChat Public Account Development

Complete Tutorial One for WeChat Public Account Development

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