woocommerce_product_related_posts_relate_by_category │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_product_related_posts_relate_by_category', 'wp_kama_woocommerce_product_related_posts_relate_by_category_filter', 10, 2 );

/**
 * Function for `woocommerce_product_related_posts_relate_by_category` filter-hook.
 * 
 * @param  $true       
 * @param  $product_id 
 *
 * @return 
 */
function wp_kama_woocommerce_product_related_posts_relate_by_category_filter( $true, $product_id ){

	// filter...
	return $true;
}

$true

-

$product_id

-

Where the hook is called

$cats_array = apply_filters( 'woocommerce_product_related_posts_relate_by_category', true, $product_id ) ? apply_filters( 'woocommerce_get_related_product_cat_terms', wc_get_product_term_ids( $product_id, 'product_cat' ), $product_id ) : array();

Where the hook is used in WooCommerce

add_filter( 'woocommerce_product_related_posts_relate_by_category', $category_callback, PHP_INT_MAX );

remove_filter( 'woocommerce_product_related_posts_relate_by_category', $category_callback, PHP_INT_MAX );