Before reading this article, you must make the following preparations:

1. Register a subscription account (via WeChat public platform https://mp.weixin.qq.com/);
2. Register for Sina Cloud and perform real-name authentication http://sae.sina.com.cn/
3. After real-name authentication for Sina Cloud, create a cloud application.
4. You need to know the basic knowledge of PHP.

1: Verification interface

1. Log in to our official account. Then click to enter the developer tools, in the lower left corner of the page after logging in.

2. Click to enter the developer documentation. Then click to start development and click on the access guide. We will see the following picture.

The picture says, connect to WeChat For public platform development, developers need to follow the following steps:

1. Fill in the server configuration
2. Verify the validity of the server address
3. Implement business logic based on the interface document.

The first step:Fill in the server configuration

After we log in to the WeChat official account, click on the basic development configuration in the lower right corner,

URL is the interface URL used by developers to receive WeChat messages and events. We will explain how to fill it in in detail later.

Token can be filled in at will (but everyone is different, If the subsequent submission fails, you can try to modify the Token). This Token will be compared with the Token contained in the interface to verify the security. The EncodingAESKey is manually filled in by the developer or randomly generated, and will be used as the message body encryption and decryption key.

The URL filled in requires us to have the address of our own server. Now we are going to the Sina Cloud application we registered before.

1. Log in to Sina Cloud and click Cloud Apply, click to enter the console. Create the

second-level domain name and application name as shown below. Just give it a name. Then click to enter. The place marked in red in the picture.

3. Click the arrow as shown below to enter the editing code

4. After that, the SAE interface will pop up. We need to create a php file in it, and then click to access it through URL. Then we copy this URL and put it on the URL we basically configured before.

Step 2:Verify that the message indeed comes from the WeChat server

Specificphp code As follows:

<?php
 // //最簡單的驗證方式
 // echo $_GET["echostr"];

 //驗證是否來自于微信
 function checkWeixin(){
  //微信會發(fā)送4個參數(shù)到我們的服務(wù)器后臺 簽名 時間戳 隨機字符串 隨機數(shù)

  $signature = $_GET["signature"];
  $timestamp = $_GET["timestamp"];
  $nonce = $_GET["nonce"];
  $echostr = $_GET["echostr"];
  $token = "qilipingmgl";

  // 1）將token、timestamp、nonce三個參數(shù)進行字典序排序
  $tmpArr = array($nonce,$token,$timestamp);
  sort($tmpArr,SORT_STRING);

  // 2）將三個參數(shù)字符串拼接成一個字符串進行sha1加密
  $str = implode($tmpArr);
  $sign = sha1($str);

  // 3）開發(fā)者獲得加密后的字符串可與signature對比，標識該請求來源于微信
  if ($sign == $signature) {
   echo $echostr;
  }
 }
 checkWeixin();
?>

Note: $token in the code is different for everyone, we need to fill in our own, click on the developer tools, and then there is a public platform test on the right Account, click to enter, then we will see the interface configuration, copy the Token and put it into the code.

We copy this code into the SAE php file we just created, and then save it (remember to save Oh), and then click Access via URL,

If an error is reported (if the error message is a number), please click on the developer documentation, click Read before starting, there is an interface return code description, we can compare it Let’s see where the error is. Note: 0 means the request is successful.

2. Obtain access_token

Tip: access_token is the only global interface for the public account Calling credentials, public accounts need to use access_token when calling each interface. As developers, we must keep it properly. The validity period of access_token is currently 2 hours and needs to be refreshed regularly. Repeated acquisition will cause the last access_token to become invalid.

第一步,我們點擊開發(fā)者文檔,點擊開始開發(fā),點擊獲取access_token之后會看到,http請求方式:GET,然后一個網(wǎng)址,我們需要用到這個網(wǎng)址,如下圖,

E0204D74-2EA6-4943-B93F-7E7C1E2FA88A.png

第二步:我們寫GET請求的函數(shù),獲取access_token

<?php
 class Weixin{
  private $appID = "wxe62f370c4e2cade2";
  private $appsecret = "58807091ae5a4c59ee3e47108184bdb7";

  function getAccessToken(){
   $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$this->appID}&secret={$this->appsecret}";

   // return $this->httpGet($url);
   //json字符串
   $json = $this->httpGet($url);
   //解析json
   $obj = json_decode($json);
   return $obj->access_token;
  }

  function httpGet($url){
   //1.初始化
   $curl = curl_init();
   //配置curl
   curl_setopt($curl, CURLOPT_URL, $url);
   curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
   //執(zhí)行curl
   $res = curl_exec($curl);
   //關(guān)閉curl
   curl_close($curl);
   return $res;
  }
 }
 $wx = new Weixin();
 echo $wx->getAccessToken();

 /*
  獲取access_token方法 get方法
 */
?>

注意:代碼中 $appID 和 $appsecret 是每個人不同的,我們需要填寫自己的,點擊開發(fā)者工具,之后右邊有公眾平臺測試賬號,點擊進入,之后我們會看到測試號信息.然后復(fù)制過來放到代碼中.

第三步:我們代碼復(fù)制到SAEphp文件中,點擊右鍵通過URL訪問,如果返回 {"access_token":"ACCESS_TOKEN","expires_in":7200} 表示我們獲取token成功.如果不幸報錯了,沒關(guān)系我們找錯誤,點擊開發(fā)文檔,點擊開始前必讀,點擊接口返回碼說明,我們對照一下,根據(jù)提示找錯誤就好了.

說道這里我們的配置接口就完成了,下一節(jié)我們繼續(xù)微信開發(fā)->自定菜單創(chuàng)建接口.

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