Forcing W3 Total Cache to Clear Parent Category Listing Pages on Post Save

forcing-w3-total-cache-to-clear-parent-category-listing-pages-on-post-save.php

<?php
/**
 * Clear Total Cache term listing pages for a post
 * @param $post_id
 * @param $post
 *
 * @return void
 */
function rw_clear_total_cache_terms_pages( $post_id, $post ) {
	if ( function_exists( 'w3tc_flush_url' ) ) {
		$taxonomies = get_object_taxonomies( $post->post_type );
		foreach ( $taxonomies as $taxonomy ) {
			$terms = get_the_terms( $post_id, $taxonomy );
			if ( $terms ) {
				foreach ( $terms as $term ) {
					$urls = rw_get_post_term_urls( $term, $taxonomy );
					if ( ! empty( $urls ) ) {
						foreach ( $urls as $url ) {
							w3tc_flush_url( $url );
						}
					}
				}
			}
		}
	}
}

/**
 * Recursively get the URLs of all terms up to the parent
 * @param $term
 * @param $taxonomy
 * @param $urls
 *
 * @return array|mixed
 */
function rw_get_post_term_urls( $term, $taxonomy, $urls = array() ) {
	if ( $term ) {
		$urls[] = get_term_link( $term, $taxonomy );
		if ( $term->parent ) {
			$urls = array_merge( $urls, rw_get_post_term_urls( $term->parent, $taxonomy ), $urls );
		} else {
			return $urls;
		}
	}

	return $urls;
}


add_action( 'save_post', 'rw_clear_total_cache_terms_pages', 10, 2 );
add_action( 'delete_post', 'rw_clear_total_cache_terms_pages', 10, 2 );
add_action( 'publish_post', 'rw_clear_total_cache_terms_pages', 10, 2 );
add_action( 'draft_post', 'rw_clear_total_cache_terms_pages', 10, 2 );