1. Go to this page and download the library: Download creativeorange/gravatar 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/ */
Gravatar::get('[email protected]', 'small-secure'); // will use the small-secure group
Gravatar::get('[email protected]', 'medium'); // will use the medium group
Gravatar::get('[email protected]', 'default'); // will use the default group
Gravatar::get('[email protected]'); // will use the default group