1. Go to this page and download the library: Download littlemo/wechat library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
littlemo / wechat example snippets
use littlemo\wechat\Class;
$Class = new Class($appid , $secret, $mchid , $key , $certPath, $keyPath );