How to use WeChat public account API in PHP development

With the advent of the mobile Internet era, WeChat has become one of the indispensable social media in people's lives. The emergence of the WeChat public platform has allowed companies to gradually discover the convenience and advantages that WeChat brings to brand promotion and customer service. For PHP developers, combined with WeChat public account API development, WeChat and PHP languages ​​can be organically linked together to provide a more perfect user experience.

This article will introduce how to use WeChat public account API in PHP development.

1. Register a WeChat public platform account

First, we need to register an account on the WeChat public platform. During the registration process, you need to fill in the corresponding information, such as public account type, public account name, avatar, WeChat ID, profile, etc. After successful registration, you will obtain the AppID and AppSecret of the public account. This information needs to be recorded and used later.

2. Configuring the server and verification URL

In the WeChat public platform, you need to configure the server and verification URL to implement functions such as automatic replies and menus. First, you need to install and configure LAMP or WAMP environments locally or on a cloud server. Then, turn on the official account developer mode, set the corresponding server URL, fill in the server URL and Token value into the configuration page, and enable the server configuration.

3. Get the Access_Token called by the interface

When using the WeChat public account API for development, you need to obtain the Access_Token. It is a necessary parameter for calling many WeChat APIs and can be obtained through a simple HTTP request. The specific method is as follows:

<?php
$appid = "***********";
$appsecret = "**********";
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$res = curl_exec($ch);
curl_close($ch);
$json_obj = json_decode($res,true);
$access_token = $json_obj['access_token'];
?>

In this way, you can obtain the Access Token.

4. Get user information

When using the WeChat public account API for development, you need to obtain the user's information, such as the user's openid, nickname, etc. The acquisition method is as follows:

<?php
$url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=".$access_token."&openid=".$openid."&lang=zh_CN";
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$res = curl_exec($ch);
curl_close($ch);
$user_info = json_decode($res,true);
$nickname = $user_info['nickname'];
$headimgurl = $user_info['headimgurl'];
?>

5. Generate QR code

Using the WeChat public account API can also generate temporary or permanent QR codes, which is convenient for users to scan for promotions and activities. The generation method is as follows:

<?php
//永久二维码，scene_id是自己定义的一个ID
$qcode_data='{"action_name": "QR_LIMIT_SCENE", "action_info": {"scene": {"scene_id": '.$scene_id.'}}}';
$url="https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=".$access_token;
$res=http_request($url,$qcode_data);
$res_arr=json_decode($res,true);
$qcode_url="https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=".urlencode($res_arr['ticket']);
?>

6. Automatic reply

In the WeChat public platform, after the user sends a message, the user needs to reply with the corresponding prompt information. Automatic replies can be achieved through the WeChat public account API. Reply methods include text, pictures, voice, video, graphics and text, etc. For specific implementation, please refer to the sample code provided by the WeChat public platform.

The above is a basic introduction on how to use WeChat public account API in PHP development. By learning and mastering the WeChat public platform and related APIs, we can achieve richer and more efficient development of WeChat public accounts, helping companies better serve customers and promote brands.

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