// 2. Retrieve the posts (and their respective poster/online status) by known id`s
    $query = array(
        'SELECT'    => 'u.email, u.title, u.url, u.location, u.signature, u.email_setting, u.num_posts, u.registered, u.admin_note, u.avatar, u.avatar_width, u.avatar_height, p.id, p.poster AS username, p.poster_id, p.poster_ip, p.poster_email, p.message, p.hide_smilies, p.posted, p.edited, p.edited_by, g.g_id, g.g_user_title, o.user_id AS is_online',
        'FROM'        => 'posts AS p',
        'JOINS'        => array(
            array(
                'INNER JOIN'    => 'users AS u',
                'ON'            => 'u.id=p.poster_id'
            ),
            array(
                'INNER JOIN'    => 'groups AS g',
                'ON'            => 'g.g_id=u.group_id'
            ),
            array(
                'LEFT JOIN'        => 'online AS o',
                'ON'            => '(o.user_id=u.id AND o.user_id!=1 AND o.idle=0)'
            ),
        ),
        'WHERE'        => 'p.id IN ('.implode(',', $posts_id).')',
        'ORDER BY'    => 'p.id'
    );