Recent Posts Shortcode

shortcode.php

<?php

// Recent Posts
function recent_posts($atts){
 $q = new WP_Query( 
   array( 'orderby' => 'date', 'posts_per_page' => '4') 
 );

$list = '<ul class="recent-posts">';

while($q->have_posts()) : $q->the_post();

 $list .= '<li>' . get_the_post_thumbnail() . '<a href="' . get_permalink() . '">' . get_the_title() . '</a>' . '</li>';

endwhile;

wp_reset_query();

return $list . '</ul>';

}

add_shortcode('recent_posts', 'recent_posts');

?>