post random

Sou novo aqui, Como faço nesse codígo os post ficarem random`

<?php
global $post,$wpdb;

// $latest_menus = get_posts(‘numberposts=’.$post_number.’postlink=’.$post_link.’&category=’.$category.’&post_type=’.CUSTOM_POST_TYPE1);
if($category)
{
$sqlsql = “and p.ID in (select tr.object_id from $wpdb->term_relationships tr join $wpdb->term_taxonomy t on t.term_taxonomy_id=tr.term_taxonomy_id where t.term_id in ($category) )”;
}
$sql = “select p.* from $wpdb->posts p where p.post_type='”.CUSTOM_POST_TYPE1.”‘ and p.post_status=’publish’ $sqlsql order by p.post_date desc,p.post_title asc limit $post_number”;
$latest_menus = $wpdb->get_results($sql);

foreach($latest_menus as $post) :
setup_postdata($post);
?>