Action to show on Single Product only Related Products to Product Archive

gistfile1.txt

// Remove default related products function
remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 );

// Add our custom related products function to the same hook
add_action( 'woocommerce_after_single_product_summary', 'custom_related_products', 20 );
function custom_related_products() {
    // Use global $product object
    global $product;
    
    // Prepare the arguments for WP_Query
    $args = array(
        'post_type'             => 'product',  // Only get products
        'posts_per_page'        => 4,  // Number of related products to show
        'ignore_sticky_posts'   => 1,  // Ignore sticky posts
        'no_found_rows'         => 1,  // Optimizes WP_Query when pagination is not needed
        'post__not_in'          => array( $product->get_id() ),  // Exclude the current product
        'tax_query'             => array(
            array(
                'taxonomy'      => 'product_cat',  // We're using product categories
                'field'         => 'id',  // We're referencing the categories by ID
                'terms'         => wp_get_post_terms( $product->get_id(), 'product_cat', array( 'fields' => 'ids' ) ),  // Get IDs of categories of current product
            )
        )
    );

    // Query related products
    $related_products = new WP_Query( $args );

    // Check if the query found any related products
    if( $related_products->have_posts() ) {
        // Output section and header
        echo '<section class="related products">';
        echo '<h2>' . __( 'Related Products', 'woocommerce' ) . '</h2>';
        echo '<ul class="products columns-4">';
        
        // Loop through related products
        while ( $related_products->have_posts() ) {
            $related_products->the_post();
            // Get the product content template for each related product
            wc_get_template_part( 'content', 'product' );
        }

        // Close section
        echo '</ul>';
        echo '</section>';
    }
    // Restore original Post Data
    wp_reset_postdata();
}