DocumentationOnline documentation for Ajax Load More
Random Ordering
Out-of-the-box Ajax Load More can not order posts by random, however, it can be achieved by running a custom WP_Query that builds an array of post IDs – the post IDs are then passed into the post__in shortcode parameter for display.
functions.php
<?php
$post_ids = [];
// Query ALL posts ordered by random.
$args = [
'post_type' => [ 'post' ],
'orderby' => 'rand',
'posts_per_page' => -1,
'ignore_sticky_posts' => true,
];
$the_query = new WP_Query( $args );
while ( $the_query->have_posts() ) : $the_query->the_post();
$post_ids[] = $post->ID; // Build array of post IDs.
endwhile; wp_reset_query();
// Pass $post_ids array to Ajax Load More post__in parameter.
echo do_shortcode( '[ajax_load_more post__in="'. implode( ',', $post_ids ) .'" orderby="post__in"]' );
?>Note: Ordering by random is very server intensive and some hosts (e.g. WPEngine) disallow this orderby query parameter completely.