Displays project categories in WordPress

product-cats.php

<?php 

// Add this code to your theme's functions.php file or use the Code Snippets plugin.

/**
 * WooCommerce Product Categories Dropdown Shortcode with Title
 */
function custom_woocommerce_category_dropdown_shortcode($atts) {
    // Ensure WooCommerce is active
    if (!class_exists('WooCommerce')) {
        return '<p>WooCommerce plugin is not activated.</p>';
    }

    // Extract attributes
    $atts = shortcode_atts(array(
        'placeholder' => 'Select a category', // Default placeholder text
        'title'       => 'Product Categories', // Default title
    ), $atts, 'category_dropdown');

    // Get WooCommerce product categories
    $categories = get_terms(array(
        'taxonomy'   => 'product_cat',
        'hide_empty' => true, // Only show categories with products
    ));

    // Build the output
    ob_start();
    echo '<div class="woocommerce-category-dropdown-wrapper">';
    
    // Display the title
    if (!empty($atts['title'])) {
        echo '<h2 class="category-dropdown-title">' . esc_html($atts['title']) . '</h2>';
    }

    // Display the dropdown
    if (!empty($categories) && !is_wp_error($categories)) {
        ?>
        <form class="woocommerce-category-dropdown" method="get" action="<?php echo esc_url(home_url('/')); ?>">
            <select name="product_cat" onchange="this.form.submit()">
                <option value=""><?php echo esc_attr($atts['placeholder']); ?></option>
                <?php foreach ($categories as $category) : ?>
                    <option value="<?php echo esc_attr($category->slug); ?>">
                        <?php echo esc_html($category->name); ?>
                    </option>
                <?php endforeach; ?>
            </select>
            <input type="hidden" name="post_type" value="product" />
        </form>
        <?php
    } else {
        echo '<p>No categories found.</p>';
    }

    echo '</div>';
    return ob_get_clean();
}
add_shortcode('category_dropdown', 'custom_woocommerce_category_dropdown_shortcode');