Change WooCommerce [products] shortcode display order - Change the order of products in [products] shortcode to order in ids parameter if 'orderby' is set to 'ids'. https://www.damiencarbery.com/2024/05/change-woocommerce-products-shortcode-display-order/

wc-products-shortcode-ids-order.php

<?php
/*
Plugin Name: WooCommerce - Change [products] shortcode display order
Plugin URI: https://www.damiencarbery.com/
Description: Change the order of products in [products] shortcode to order in ids parameter if 'orderby' is set to 'ids'. Example: [products ids="1,5,2,4" orderby="ids"]
Author: Damien Carbery
Author URI: https://www.damiencarbery.com
Version: 0.1.20240517
*/


// Change order of [products] shortcode results to that specified in 'ids' parameter.
add_filter( 'woocommerce_shortcode_products_query_results', 'dcwd_products_query_results', 10, 2 );
function dcwd_products_query_results( $results, $shortcode_class ) {
	$orderby = $shortcode_class->get_attributes()[ 'orderby' ];
	// Ensure 'orderby' is set to 'ids'.
	if ( ! empty( $orderby ) && 'ids' == $orderby ) {
		$ids_str = $shortcode_class->get_attributes()[ 'ids' ];

		// Do not change anything if the 'ids' parameter is empty.
		if ( ! empty( $ids_str ) ) {
			$ids = array_map( 'trim', explode( ',', $ids_str ) );

			// Verify that the IDs are in the query results (in case any were invalid).
			// This isn't really necessary as WooCommerce will skip over invalid IDs.
			$valid_ids = array();
			foreach ( $ids as $id ) {
				if ( in_array( $id, $results->ids ) ) {
					$valid_ids[] = $id;
				}
			}

			// And ensure some IDs were provided.
			if ( count( $valid_ids ) ) {
				$results->ids = $valid_ids;
			}
		}
	}

	return $results;
}