How to use PHP to implement the group message preview function of public accounts

How to use PHP to implement the group message preview function of public accounts

With the rapid development of social media, public accounts have become a way for enterprises and individuals to disseminate and promote information. One of the important channels. In the operation process of public accounts, group messaging is a common push method. In order to ensure the effectiveness of the message sent, the preview function becomes particularly important. This article will introduce how to use PHP to implement the group message preview function of public accounts.

1. Preparation

1. Public account developer account: Register a developer account on the WeChat public platform and complete the certification of the public account.
2. PHP environment: Make sure you have set up a PHP environment and you can run PHP locally or on the server.
3. WeChat Public Account Development Kit (SDK): Download and install the WeChat Public Account Development Kit, which provides an interface to access the WeChat Public Platform API.

2. Obtain Access Token

Before using the API interface of WeChat public platform, you need to obtain Access Token first. Access Token is an important parameter for sending requests to the WeChat server. Access Token can be obtained through the following code:

$url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=YOUR_APPID&secret=YOUR_SECRET';
$response = file_get_contents($url);
$result = json_decode($response, true);
$access_token = $result['access_token'];

Among them, YOUR_APPID is the AppID generated when creating an application on the WeChat public platform, and YOUR_SECRET is the corresponding App Secret.

3. Obtain the user list

Before previewing the message, you need to obtain the user list of the official account. You can obtain the user list through the following code:

$url = 'https://api.weixin.qq.com/cgi-bin/user/get?access_token=' . $access_token;
$response = file_get_contents($url);
$result = json_decode($response, true);
$user_list = $result['data']['openid'];

Among them, $access_token is the Access Token obtained previously.

4. Sending preview messages

To send preview messages, you need to use the API interface for sending customer service messages. You can send a preview message through the following code:

$url = 'https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=' . $access_token;
$data = array(
    'touser' => 'OPENID', // 预览用户的Open ID
    'msgtype' => 'text', // 消息类型，这里以文本消息为例
    'text' => array(
        'content' => '这是一条预览消息' // 预览消息的内容
    )
);
$data_string = json_encode($data);
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data_string)
));
$response = curl_exec($ch);
curl_close($ch);

The 'touser' parameter is filled in with the Open ID of the user who needs to preview, and the 'text' parameter is filled with the content of the preview message.

5. Improve the code

By combining the above codes, you can realize the preview function of public accounts’ group messages. The code can be expanded according to the actual situation to achieve more functions, such as previewing graphic messages, etc.

Summary:

To implement the public account group message preview function through PHP, you need to first obtain the Access Token, then obtain the user list, and finally use the API interface for sending customer service messages to send the preview message. The implementation of the preview function can improve the effect of group messaging and ensure that the messages sent meet expectations. By understanding and mastering the API interface of the WeChat public platform, you can better operate and promote public accounts and improve user experience and participation.

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