1. Go to this page and download the library: Download inc2734/wp-ogp 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/ */
inc2734 / wp-ogp example snippets
add_action(
'wp_head',
function() {
$ogp = new \Inc2734\WP_OGP\Bootsrap();