How to use PHP to implement the group messaging function of public accounts

How to use PHP to implement the group messaging function of public accounts requires specific code examples

As WeChat public accounts become more and more popular, many companies and individuals hope Able to communicate and interact with users through public accounts. The group messaging function of official accounts allows us to send messages to a large number of users at once, improving the efficiency of information transmission. The following will introduce how to use PHP to implement the group messaging function of public accounts and provide specific code examples.

1. Preparation work

Before we start writing code, we need to make sure that we have the following conditions:

• Have a WeChat official account, And activated the developer mode;
• has obtained the App ID and App Secret of the public account;
• understands the PHP programming language and installed the PHP interpreter.
• Obtained AccessToken, visit https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET, replace APPID and APPSECRET with your own information, you can get it AccessToken.

2. Writing code

First, create a PHP file named send_message.php. Add the following code to the file:

<?php
    // 定义公众号的App ID和App Secret
    $appId = 'your_app_id';
    $appSecret = 'your_app_secret';

    // 定义要发送的消息内容
    $message = 'Hello, World!';

    // 获取AccessToken
    $accessToken = getAccessToken($appId, $appSecret);

    // 构造群发消息的URL
    $url = 'https://api.weixin.qq.com/cgi-bin/message/mass/sendall?access_token=' . $accessToken;

    // 构造消息数据
    $data = array(
        'filter' => array(
            'is_to_all' => true  // 发送给所有用户
        ),
        'text' => array(
            'content' => $message  // 消息内容
        ),
        'msgtype' => 'text'  // 消息类型为文本
    );

    // 发送群发消息
    $result = httpPost($url, json_encode($data));

    // 输出结果
    echo $result;

    // 获取AccessToken
    function getAccessToken($appId, $appSecret) {
        $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' . $appId . '&secret=' . $appSecret;
        $result = file_get_contents($url);
        $resultJson = json_decode($result, true);
        return $resultJson['access_token'];
    }

    // 发送HTTP POST请求
    function httpPost($url, $data) {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            'Content-Type: application/json'
        ));
        $result = curl_exec($ch);
        curl_close($ch);
        return $result;
    }
?>

In the code, we first define the App ID and App Secret of the official account, as well as the content of the message to be sent. Then, obtain the AccessToken through the getAccessToken function. Next, we construct the URL to send the group message and construct the message data. Finally, send an HTTP POST request through the httpPost function to send the message to all users of the official account.

3. Test code

Save and upload the send_message.php file to the server, and then access the URL of the file to trigger the sending of group messages.

It should be noted that the group messaging function is limited in the WeChat public account platform. Official accounts must meet certain conditions before they can use the group messaging function, such as the number of fans, certification status, etc. For specific restrictions, please refer to the documents of the WeChat public platform.

Summary

This article introduces how to use PHP to implement the group messaging function of public accounts, and provides specific code examples. Through this code, we can easily implement the function of sending messages to a large number of users at one time and improve the efficiency of information transmission. Of course, in practical applications, we can also make appropriate modifications and extensions according to our own needs. I hope this article will be helpful to developers who want to use PHP to implement the group messaging function of public accounts.

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