Shortcode to display the woo subcategories of a category

This is a function that generates a shortcode that can be used in products archive template to display the subcategories of the current queried category if any. You can style the output as you wish.

/* !Function that generates a shortcode to display the subcategories of a category */
add_shortcode('subcategories_list', 'subcategories_shortcode');
function subcategories_shortcode() {
	
	if ( !is_product_category() ) {
		return ''; // Ensure the function only runs on product category pages
	}
	
	// Get the current product category
	$current_category = get_queried_object();
	
	// Get subcategories of the current category
	$subcategories = get_terms([
		'taxonomy' => 'product_cat',
		'parent' => $current_category->term_id,
		'hide_empty' => true, // Set to true if you want to exclude empty categories
		'orderby' => 'menu_order', // Follow the order from the admin
		'order' => 'ASC', // Default sorting order
	]);
	
	if ( empty( $subcategories ) || is_wp_error( $subcategories ) ) {
		return ''; // Handle cases where there are no subcategories
	}
	
	// Start output buffer
	ob_start();
	
	echo '<div class="subcategories-wrapper">';
	
	foreach ($subcategories as $subcategory) {
		// Get subcategory thumbnail
		$thumbnail_id = get_term_meta($subcategory->term_id, 'thumbnail_id', true);
		$thumbnail_url = $thumbnail_id ? wp_get_attachment_url($thumbnail_id) : wc_placeholder_img_src();
		
		// Get subcategory name and product count
		$name = $subcategory->name;
		$product_count = $subcategory->count;
		
		// Subcategory URL
		$subcategory_link = get_term_link($subcategory);
		
		// Render subcategory HTML
		echo '<div class="subcategory-item">';
		echo '<a href="' . esc_url($subcategory_link) . '">';
		echo '<img src="' . esc_url($thumbnail_url) . '" alt="' . esc_attr($name) . '" />';
		echo '<div>';
		echo '<h3>' . esc_html($name) . '<mark class="count">(' . $product_count . ')</mark></h3>';
		echo '</div>';
		echo '</a>';
		echo '</div>';
	}
	
	echo '</div>';
	
	// Return output
	return ob_get_clean();
}
Code language: PHP (php)