wordpress php query randomise
//Create WordPress Query with 'orderby' set to 'rand' (Random)
$the_query = new WP_Query( array ( 'orderby' => 'rand', 'posts_per_page' => '1' ) );
// output the random post
while ( $the_query->have_posts() ) : $the_query->the_post();
echo '<li>';
the_title();
echo '</li>';
endwhile;
// Reset Post Data
wp_reset_postdata();