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// Shortcode per visualizzare gli ultimi post
add_shortcode( 'list-posts', 'list_posts_shortcode' );
function list_posts_shortcode( $atts ) {
    ob_start();
 
    // define attributes and their defaults
    extract( shortcode_atts( array (
        'type' => 'post',
        'order' => 'ASC',
        'orderby' => 'date',
        'posts_per_page' => -1
    ), $atts ) );
 
    // define query parameters based on attributes
    $options = array(
        'post_type' => $type,
        'order' => $order,
        'orderby' => $orderby,
        'posts_per_page' => $posts_per_page
    );
    $q = new WP_Query( $options );
    
    $list = '<ul class="recent-posts">';
    while($q->have_posts()) : $q->the_post();
        $list .= '<li><a href="' . get_permalink() . '">' . get_the_title() . '</a>' . '<br />' . get_the_excerpt() . '</li>';
    endwhile;
    wp_reset_query();
    return $list . '</ul>';

}