如何修改代码在WooCommerce中排除多个分类的相关产品？

Hey there! Great question—adding a second excluded category is straightforward once you know where to adjust your existing code.

First, let’s assume your current code (the one that excludes 'workshops') looks something like this:

add_filter( 'woocommerce_related_products_query', 'exclude_specific_categories_from_related_products' );
function exclude_specific_categories_from_related_products( $query ) {
    // Get the current product's ID
    $product_id = get_the_ID();
    // Get the term ID for the 'workshops' category
    $excluded_cat_ids = get_term_by( 'slug', 'workshops', 'product_cat' )->term_id;
    
    // Exclude the category from the related products query
    $query['tax_query'][] = array(
        'taxonomy' => 'product_cat',
        'field'    => 'term_id',
        'terms'    => $excluded_cat_ids,
        'operator' => 'NOT IN',
    );
    
    return $query;
}

To add the 'events' category to the exclusion list, you just need to update the code to handle an array of category slugs instead of a single one. Here’s the modified version:

add_filter( 'woocommerce_related_products_query', 'exclude_specific_categories_from_related_products' );
function exclude_specific_categories_from_related_products( $query ) {
    // Get the current product's ID
    $product_id = get_the_ID();
    
    // Define slugs of categories you want to exclude
    $excluded_cat_slugs = array( 'workshops', 'events' );
    $excluded_cat_ids = array();
    
    // Fetch term IDs for each excluded category slug
    foreach ( $excluded_cat_slugs as $slug ) {
        $term = get_term_by( 'slug', $slug, 'product_cat' );
        if ( $term ) {
            $excluded_cat_ids[] = $term->term_id;
        }
    }
    
    // Only add the tax filter if we have valid category IDs
    if ( ! empty( $excluded_cat_ids ) ) {
        $query['tax_query'][] = array(
            'taxonomy' => 'product_cat',
            'field'    => 'term_id',
            'terms'    => $excluded_cat_ids,
            'operator' => 'NOT IN',
        );
    }
    
    return $query;
}

Quick Tips: #

• Double-check that 'workshops' and 'events' match the exact slugs of your WooCommerce product categories (you can confirm these in Products > Categories in your WP admin).
• Always edit your child theme’s functions.php—never the parent theme, since updates will wipe your custom code.
• It’s smart to back up your functions.php file before making changes, just to be safe.

内容的提问来源于stack exchange，提问作者Nate