README

Test with Atoum

cd Opengraph/
curl -s https://getcomposer.org/installer | php
php composer.phar install --dev
./vendor/bin/phpunit -c phpunit.xml.dist

Writer

<?php
namespace Application;

require_once __DIR__ . '/../src/Opengraph/Meta.php';
require_once __DIR__ . '/../src/Opengraph/Opengraph.php';
require_once __DIR__ . '/../src/Opengraph/Writer.php';

use Opengraph;

$writer = new Opengraph\Writer();
$writer->append(Opengraph\Writer::OG_TITLE, 'The Rock');
$writer->append(Opengraph\Writer::OG_TYPE, Opengraph\Writer::TYPE_VIDEO_MOVIE);
$writer->append(Opengraph\Writer::OG_URL, 'http://www.imdb.com/title/tt0117500/');
$writer->append(Opengraph\Writer::OG_IMAGE, 'http://ia.media-imdb.com/images/rock.jpg');

echo $writer->render() . PHP_EOL;

?>

Output

<meta property="og:title" content="The Rock" />
<meta property="og:type" content="video.movie" />
<meta property="og:url" content="http://www.imdb.com/title/tt0117500/" />
<meta property="og:image" content="http://ia.media-imdb.com/images/rock.jpg" />

Reader

<?php
namespace Application;

require_once __DIR__ . '/../src/Opengraph/Meta.php';
require_once __DIR__ . '/../src/Opengraph/Opengraph.php';
require_once __DIR__ . '/../src/Opengraph/Reader.php';

use Opengraph;

$reader = new Opengraph\Reader();
$reader->parse(file_get_contents('http://www.imdb.com/title/tt0117500/'));
print_r($reader->getArrayCopy());

?>

Output

Array
(
    [og:url] => http://www.imdb.com/title/tt0117500/
    [og:title] => Rock (1996)
    [og:type] => video.movie
    [og:image] => Array
        (
            [0] => Array
                (
                    [og:image:url] => http://ia.media-imdb.com/images/M/MV5BMTM3MTczOTM1OF5BMl5BanBnXkFtZTYwMjc1NDA5._V1._SX98_SY140_.jpg
                )

        )

    [og:site_name] => IMDb
    [fb:app_id] => 115109575169727
)