您可以使用此代码

add_action(\'init\',\'random_add_rewrite\');
function random_add_rewrite() {
   global $wp;
   $wp->add_query_var(\'random\');
   add_rewrite_rule(\'random/?$\', \'index.php?random=1\', \'top\');
 }

 add_action(\'template_redirect\',\'random_template\');
 function random_template() {
   if (get_query_var(\'random\') == 1) {
           $posts = get_posts(\'post_type=post&orderby=rand&numberposts=1\');
           foreach($posts as $post) {
                   $link = get_permalink($post);
           }
           wp_redirect($link,307);
           exit;
    }
 }

 <a href="http://.....com/?random=1/" >Random Post</a>