How to use PHP to develop the keyword reply function of public accounts

How to use PHP to develop the keyword reply function of public accounts

With the rapid development of social media, WeChat public accounts have become a way for enterprises, institutions and individuals to spread information One of the important channels. In order to improve user experience and be able to reply to users' messages in a timely manner, it is very important to develop the keyword reply function of public accounts. This article will introduce how to use PHP to develop the keyword reply function of public accounts and provide specific code examples.

1. Create a public account

First, we need to create a public account on the WeChat public platform. After registering and binding the official account, obtain your AppID and AppSecret in the Developer Center. This information will be used in subsequent development.

2. Obtain access_token

Before using the WeChat interface for development, we need to obtain the access_token, which is the credential for calling the WeChat API interface. We can obtain the access_token through the following code:

function getAccessToken($appid, $appsecret){
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
    $result = httpGet($url);
    $accessToken = json_decode($result, true)['access_token'];
    return $accessToken;
}

function httpGet($url){
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 500);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($curl, CURLOPT_URL, $url);
    $result = curl_exec($curl);
    curl_close($curl);
    return $result;
}

$appid = "Your App ID";
$appsecret = "Your App Secret";
$accessToken = getAccessToken($appid, $appsecret);

3. Monitor user messages

In the development settings of the official account, we can forward the received user messages to our own server for processing. We can use PHP to develop an interface to listen to messages sent by users and perform keyword matching and replies.

$data = file_get_contents("php://input");
$message = simplexml_load_string($data, 'SimpleXMLElement', LIBXML_NOCDATA);
$msgType = $message->MsgType;
$keyword = trim($message->Content);
$reply = "";

if ($msgType == "text") {
    if ($keyword == "你好") {
        $reply = "你好，欢迎关注我们的公众号！";
    } elseif ($keyword == "最新消息") {
        $reply = "这里是最新消息！";
    } else {
        $reply = "感谢您的留言，我们会尽快回复您！";
    }
}

$response = "<xml>
<ToUserName><![CDATA[" . $message->FromUserName . "]]></ToUserName>
<FromUserName><![CDATA[" . $message->ToUserName . "]]></FromUserName>
<CreateTime>" . time() . "</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[" . $reply . "]]></Content>
</xml>";

echo $response;

4. Deploy to the server

Save the above code as a PHP file and deploy it to a server that supports PHP. In the development settings of the WeChat public platform, set the URL for receiving messages to the deployed URL. In this way, when a user sends a message, the WeChat server will forward the message to our server and perform keyword matching and reply.

5. Test

After completing the above steps, we can send a message to the official account for testing. Depending on the keywords, we can get different responses.

Summary:

This article introduces how to use PHP to develop the keyword reply function of public accounts, and provides specific code examples. Through the above steps, we can monitor user messages, match keywords, and reply. Of course, we can expand more functions according to specific needs. I hope this article is helpful to everyone, thank you for reading!

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