Clear CPT archives when a CPT single is created or updated

gistfile1.txt

$custom_post_types = array( "my_post" => "my_post");
$max_archive_pages = 0;	// 0 == all archive page #s

function post_status( $new_status, $old_status, $post )
{
	global $custom_post_types, $max_archive_pages;

	if ( array_key_exists( $post->post_type, $custom_post_types ) && ( $new_status === "publish" || $old_status === "publish" ) )
	{
		if ( defined( 'W3TC' ) )
		{
			$archive = empty( trim( $custom_post_types[$post->post_type] ) ) ? $post->post_type:trim( $custom_post_types[$post->post_type] );

			$post->post_status = "";
			$link = preg_replace( '~__trashed/$~', '/', get_permalink( $post ) );
			w3tc_flush_url( $link );

			$posts_per_page = get_option( 'posts_per_page' );
			$posts_number = \W3TC\Util_PageUrls::get_archive_posts_count( 0, 0, 0, $post->post_type );
			$posts_pages_number = @ceil( $posts_number / $posts_per_page );

			if ( $max_archive_pages > 0 && $posts_pages_number > $max_archive_pages ) {
				$posts_pages_number = $max_archive_pages;
			}

			if ( $posts_pages_number == 0 ) {
				w3tc_flush_url( \W3TC\Util_Environment::home_domain_root_url() . "/" . $archive );
			} else {
				for ( $pagenum = 1; $pagenum <= $posts_pages_number; $pagenum++ ) {
					$link = \W3TC\Util_PageUrls::get_pagenum_link( $archive, $pagenum );
					w3tc_flush_url( $link );
				}
			}
		}
	}
}
add_action(  'transition_post_status',  'post_status', 10, 3 );