Где расположена разметка Open Graph?

$social_tags['......

        $images = array();
        /*
        $allcontent = $row['full_story'] . $row['short_story'] . stripslashes($row['xfields']);
        preg_match_all('/(img|src)=("|\')[^"\'>]+/i', $allcontent, $media);
        $data = preg_replace('/(img|src)("|\'|="|=\')(.*)/i', "$3", $media[0]);
        */

        $allcontent = xfieldsdataload( $row['xfields'] );
        $data = explode( "~", $allcontent['image'] ); // <-- 'image' имя доп. поля (укажите свое) 

        foreach($data as $url) {
            $info = pathinfo($url);
            if( isset($info['extension']) ) {
                if( $info['filename'] == "spoiler-plus" OR $info['filename'] == "spoiler-plus" ) continue;
                $info['extension'] = strtolower($info['extension']);
                if( ($info['extension'] == 'jpg' || $info['extension'] == 'jpeg' || $info['extension'] == 'gif' || $info['extension'] == 'png') AND !in_array($url, $images) ) array_push($images, $url);
            }
        }

        if( count($images) ) $social_tags['image'] = $images[0];