woocommerce_get_product_id_by_sku │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_get_product_id_by_sku', 'wp_kama_woocommerce_get_product_id_by_sku_filter', 10, 2 );

/**
 * Function for `woocommerce_get_product_id_by_sku` filter-hook.
 * 
 * @param  $id  
 * @param  $sku 
 *
 * @return 
 */
function wp_kama_woocommerce_get_product_id_by_sku_filter( $id, $sku ){

	// filter...
	return $id;
}

$id

-

$sku

-

Where the hook is called

return (int) apply_filters( 'woocommerce_get_product_id_by_sku', $id, $sku );

Where the hook is used in WooCommerce