[WordPress][WP Rocket]Clear the cache only for certain pages when a new post of a certain custom post type is published, deleted or changed

wp-rocket-cpt-clean-posts-cache-example.php

<?php
/**
 * UNTESTED EXAMPLE!
 * Please don’t use in production without having tested it before!
 * @param  integer $post_id Current post ID
 * @return integer          Current post ID
 */
function example__cpt_clean_posts_cache( $post_id ) {
	$post = get_post( $post_id );

	// Check for post type.
	if ( 'your_post_type' !== $post->post_type )
		return $post_id;

	// Static example here, in reality would be retrieved somehow.
	$purge_ids = array( '1', '2', '3456' );

	// Iterate over given post IDs to clear from cache.
	foreach ( $purge_ids as $id )
		rocket_clean_post( $id );

	return $post_id;
}
add_action( 'wp_trash_post',    'example__cpt_clean_posts_cache' );
add_action( 'delete_post',      'example__cpt_clean_posts_cache' );
add_action( 'clean_post_cache', 'example__cpt_clean_posts_cache' );