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 :

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

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

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

Step one: User agrees to authorize, obtain

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

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

(if necessary)4 Step 4: Pull user information

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

2.2

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);
}

##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

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...

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