Replace the default WP post slug with a random one in the format is "XXXX-XXXX-XXXX-XXXX"

wordpress-random-post-slug.php

<?php

/**
 *
 *  Filter post slug
 *  This needs saving as post meta to use that value rather than regenerate a new one
 *
 **/

add_filter( 'wp_unique_post_slug', function( $slug, $post_ID, $post_status, $post_type, $post_parent, $original_slug ) {
    
    if ( ! in_array( $post_type, array( 'post' ) ) ) {
        return $slug;
    }
    
    if ( ! $slug = esc_attr( get_post_meta( $post_ID, '_slug', true ) ) ) {

	// The chance of this returning the same URL twice is 1 in 20,000,000,000. Unlikely, but possible..
	$slug = esc_attr( wordwrap( strtolower( wp_generate_password( 16, false, false ) ), 4 , '-' , true ) );

        update_post_meta( $post_ID, '_slug', $slug );

    }

    return $slug;

}, 10, 6 );