lwgists

<?php
add_action( 'woocommerce_no_products_found', 'show_featured_products_on_no_products_found', 20 );
function show_featured_products_on_no_products_found() {
	echo '<h2>' . __( 'You may be interested in...', 'domain' ) . '</h2>';
	echo do_shortcode( '[featured_products per_page="4"]' );
}

lwgists

<?php
/**
 * Hide the "In stock" message on product page.
 *
 * @param string $html
 * @param string $text
 * @param WC_Product $product
 * @return string
 */
function my_wc_hide_in_stock_message( $html, $text, $product ) {

lwgists

<?php
/**
 * Add Global Trade Identification Numbers (GTINs) to WooCommerce products.
 *
 * @link https://www.liquidweb.com/kb/using-gtin-numbers-woocommerce/
 */

/**
 * Render the Global Trade Identification Number (GTIN) meta field.
 */

lwgists

remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 );

lwgists

add_filter( 'loop_shop_per_page', 'new_loop_shop_per_page', 20 );

function new_loop_shop_per_page( $cols ) {
  // $cols contains the current number of products per page based on the value stored on Options -> Reading
  // Return the number of products you wanna show per page.
  $cols = 9;
  return $cols;
}