WooCommerce Product Alternatives Plugin
This plugin allows WooCommerce store owners to display alternative product suggestions in place of the default "Out of Stock" message. When a customer views a product that is not available, they are presented with a list of alternative in-stock products to encourage continued shopping and potentially prevent lost sales.
<?php /** * Plugin Name: WooCommerce Product Alternatives * Description: A plugin to add the ability for customers to see alternative products if the main product is out of stock, replacing the "Out of Stock" message with a custom list. * Version: 1.0 * Author: Your Name * Text Domain: codewp */ if ( ! defined( 'ABSPATH' ) ) { exit; // Exit if accessed directly } if ( ! class_exists( 'WC_Product_Alternatives' ) ) : class WC_Product_Alternatives { public function __construct() { add_filter( 'woocommerce_get_availability', array( $this, 'custom_override_get_availability' ), 10, 2 ); add_action( 'woocommerce_product_options_general_product_data', array( $this, 'add_alternative_products_field' ) ); add_action( 'woocommerce_process_product_meta', array( $this, 'save_alternative_products_field' ), 10, 2 ); } public function add_alternative_products_field() { global $post; $product_ids = get_post_meta( $post->ID, 'alternative_products', true ); echo '<div class="options_group">'; woocommerce_wp_text_input( array( 'id' => 'alternative_products', 'label' => __('Alternative Products', 'codewp'), 'desc_tip' => 'true', 'description' => __('Enter the IDs of alternative products, separated by commas.', 'codewp'), 'type' => 'text' )); echo '</div>'; } public function save_alternative_products_field( $post_id ) { $alternative_products = isset( $_POST['alternative_products'] ) ? $_POST['alternative_products'] : ''; update_post_meta( $post_id, 'alternative_products', $alternative_products ); } public function custom_override_get_availability( $availability, $product ) { if ( ! $product->is_in_stock() ) { $alternative_products_ids = get_post_meta( $product->get_id(), 'alternative_products', true ); if ( ! empty( $alternative_products_ids ) ) { $alternative_products_ids = explode( ',', $alternative_products_ids ); $alternative_products_html = '<ul class="alternative-products-list">'; foreach ( $alternative_products_ids as $product_id ) { $alternative_product = wc_get_product( $product_id ); if ( $alternative_product && $alternative_product->is_in_stock() ) { $alternative_products_html .= '<li><a href="' . $alternative_product->get_permalink() . '">' . $alternative_product->get_name() . ' - ' . $alternative_product->get_price_html() . '</a></li>'; } } $alternative_products_html .= '</ul>'; $availability['availability'] = __('Out of stock. Check out these alternatives:', 'codewp') . $alternative_products_html; $availability['class'] = 'out-of-stock'; } else { $availability['availability'] = __('Out of stock', 'codewp'); } } return $availability; } } new WC_Product_Alternatives(); endif; ?>
Frequently Asked Questions
The plugin adds alternative product suggestions when the main product is out of stock.