Zufällige Posts mit Auszug anzeigen

function get_random_posts()
{
        $random_posts = get_posts(
        array(
            'numberposts' => 3,
            'orderby' => 'rand'
        )
    );
        $output = '<ul id="articleList">';
        foreach($random_posts as $post)
    {
        $post_title = $post->post_title;
        $post_permalink = get_permalink($post->ID);
        $thumbnail = get_the_post_thumbnail($post->ID, '40x40_thumb',
            array(
                'class' => '',
                'alt' => trim(strip_tags($post_title)),
                'title' => trim(strip_tags($post_title)),
            )
        );


        $output .= '<li><a href="' . $post_permalink . '" title="' . $post_title . '">' . $thumbnail . '<span>' . $post_title . '</span><div class="clear"></div></a></li>';
    }


    return $output . '</ul>';
}