Table of contents :

How to create custom filters for faceted search in WordPress and WooCommerce

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Table of contents :

Introduction

Faceted search is a powerful way to enhance the browsing experience on an eCommerce website. It allows users to refine search results by applying various filters in real-time. WordPress and WooCommerce provide a solid foundation for building faceted search functionality, and with a little customization, you can create custom filters to cater to your specific needs. In this post, we will explore how to create custom filters for faceted search in WordPress and WooCommerce.

Creating Custom Filters

To create custom filters for faceted search, we need to leverage the power of WordPress hooks and filters. WooCommerce provides several hooks that allow us to modify the search query and add our own custom filters.

First, let’s create a custom plugin or add the following code to your theme’s `functions.php` file to define our custom filters:


/**
 * Add custom filters to WooCommerce search
 *
 * @param array $args Search arguments.
 *
 * @return array Modified search arguments.
 */
function custom_wc_search_filters($args) {
    // Add your custom filters here
    
    return $args;
}
add_filter('woocommerce_product_data_store_cpt_get_products_query', 'custom_wc_search_filters');

In the above code, we are hooking into the `woocommerce_product_data_store_cpt_get_products_query` filter to modify the search arguments. You can add your own custom filters within the `custom_wc_search_filters` function.

Adding Custom Filters

To add custom filters, we need to modify the search query arguments and apply the filters accordingly. Here’s an example of how to add a custom filter for product categories:


/**
 * Add custom category filter to WooCommerce search
 *
 * @param array $args Search arguments.
 *
 * @return array Modified search arguments.
 */
function custom_wc_category_filter($args) {
    $category_id = isset($_GET['category']) ? (int)$_GET['category'] : 0;
    
    if ($category_id) {
        $args['tax_query'][] = array(
            'taxonomy' => 'product_cat',
            'field' => 'term_id',
            'terms' => $category_id,
        );
    }
    
    return $args;
}
add_filter('woocommerce_product_data_store_cpt_get_products_query', 'custom_wc_category_filter');

In the above code, we are checking if the `category` parameter is set in the URL. If it is, we add a taxonomy query parameter to filter the products based on the selected category.

Similarly, you can add more custom filters based on your requirements. You can filter products based on attributes, custom taxonomies, price range, etc.

Using JavaScript for Real-time Filtering

To provide a smooth and responsive user experience, it’s recommended to implement real-time filtering using JavaScript. Here’s an example of how to update the search results when a filter is applied:


jQuery(document).ready(function ($) {
    $('.filter').on('change', function () {
        var filters = {};
        
        $('.filter').each(function () {
            var filterName = $(this).data('filter');
            var filterValue = $(this).val();
            
            if (filterValue !== '') {
                filters[filterName] = filterValue;
            }
        });
        
        var data = {
            action: 'update_search_results',
            filters: filters,
        };
        
        $.post(ajaxurl, data, function (response) {
            $('.search-results').html(response);
        });
    });
});

In the above code, we are binding the `change` event to all the filter elements. When a filter value is changed, we collect all the filter values and send an AJAX request to the server to update the search results. The server-side logic for updating the search results should be implemented in a separate PHP function.

Conclusion

By customizing WordPress and WooCommerce, you can create powerful faceted search functionality with custom filters. Leveraging the available hooks and filters, you can modify the search query and apply custom filters easily. Real-time filtering can enhance the user experience by providing instant feedback as the filters are applied.

How WPSOLR Can Help

While the above solution provides a solid foundation for creating custom filters for faceted search, implementing advanced search features like autocomplete, fuzzy matching, and search suggestions can be complex. WPSOLR is a powerful search plugin that integrates seamlessly with WordPress and WooCommerce, providing a user-friendly interface to configure faceted search, advanced filtering, and other search features. By using WPSOLR, you can save time and effort in implementing custom filters and focus more on providing a great search experience for your users.

To summarize, creating custom filters for faceted search in WordPress and WooCommerce involves leveraging WordPress hooks and filters, modifying search query arguments, and implementing real-time filtering using JavaScript. With the help of plugins like WPSOLR, you can enhance your search functionality and provide an intuitive browsing experience for your users.

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