1. Go to this page and download the library: Download gkite13/vtiger-api-bundle 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/ */
gkite13 / vtiger-api-bundle example snippets
php
$queryString = "SELECT * FROM ModuleName";
$result = $this->vtigerApi->query($queryString);