examples/open_graph_protocol.php

<?php
/**
 * Example of reading Open Graph Protocol properties
 *
 * Fetches and parses an HTML, reading the Open Graph Protocol data from the page.
 * Open Graph Protocol uses a subset of RDFa.
 *
 * @copyright  Copyright (c) 2020 Nicholas J Humfrey
 * @license    http://unlicense.org/
 */
require_once realpath(__DIR__.'/..').'/vendor/autoload.php';
require_once __DIR__.'/html_tag_helpers.php';

EasyRdf\RdfNamespace::setDefault('og');
?>
<html>
<head>
  <title>Open Graph Protocol example</title>
  <style type="text/css">
    body { font-family: sans-serif; }
    dt { font-weight: bold; }
    .image { float: right; margin: 10px;}
  </style>
</head>
<body>
<?php
$doc = EasyRdf\Graph::newAndLoad('https://www.rottentomatoes.com/m/oceans_eleven');
if ($doc->image) {
    echo content_tag('img', null, ['src' => $doc->image, 'class' => 'image']);
}
?>

<h1>Open Graph Protocol example</h1>
<dl>
  <dt>Page:</dt> <dd><?php echo link_to($doc->url); ?></dd>
  <dt>Title:</dt> <dd><?php echo $doc->title; ?></dd>
  <dt>Description:</dt> <dd><?php echo $doc->description; ?></dd>
</dl>

</body>
</html>