WooCommerce: Get Product / Order Cross-Sells

Getting the list of cross-sells for a WooCommerce product is actually super easy (yes, it’s one line of PHP). But what if you need to “calculate” the list of cross-sells for an entire order, made of different products?

In this short tutorial for developers we’ll see both: how to get the cross-sell IDs for a product, and how to get the entire range of cross-sells based on what’s been purchased in a given order. Enjoy!

PHP Snippet 1: Get Product Cross-Sells

/**
 * @snippet       Get Product Cross-Sell IDs
 * @how-to        businessbloomer.com/woocommerce-customization
 * @author        Rodolfo Melogli, Business Bloomer
 * @compatible    WooCommerce 7
 * @community     https://businessbloomer.com/club/
 */

$product->get_cross_sell_ids();

PHP Snippet 2: Get Order Cross-Sells

This is as easy as looping through the order items, adding the cross sell IDs to an array, and remove the duplicates from the final array.

/**
 * @snippet       Get Order Cross-Sell IDs
 * @how-to        businessbloomer.com/woocommerce-customization
 * @author        Rodolfo Melogli, Business Bloomer
 * @compatible    WooCommerce 7
 * @community     https://businessbloomer.com/club/
 */

$items = $order->get_items();
$cross_sells = array();
foreach ( $items as $item ) {
	$cross_sells = array_merge( $item->get_product()->get_cross_sell_ids(), $cross_sells );
}	
$cross_sells = array_unique( $cross_sells );

Where to add custom code?

You should place custom PHP in functions.php and custom CSS in style.css of your child theme: where to place WooCommerce customization?

This code still works, unless you report otherwise. To exclude conflicts, temporarily switch to the Storefront theme, disable all plugins except WooCommerce, and test the snippet again: WooCommerce troubleshooting 101

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Rodolfo Melogli

Business Bloomer Founder

Author, WooCommerce expert and WordCamp speaker, Rodolfo has worked as an independent WooCommerce freelancer since 2011. His goal is to help entrepreneurs and developers overcome their WooCommerce nightmares. Rodolfo loves travelling, chasing tennis & soccer balls and, of course, wood fired oven pizza. Follow @rmelogli