1. Go to this page and download the library: Download luweiss/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/ */
luweiss / wechat example snippets
$wechat = new \luweiss\Wechat\Wechat();
$accessToken = $wechat->getAccessToken;
$wechatPay = new \luweiss\Wechat\WechatPay();
$res = $wechatPay->unifiedOrder();