WooCommerce – Display product category count within New Order email notification

Question

I'm trying to display a simple list of all the categories within a new order that comes through, and the number of items in the order within that category. So something along the lines of:

Spray Cans – 3 Accessories – 2 Markers – 5 etc

This is what I've tried so far but obviously it just shows the total of products in the category and not just relating to this order.

foreach( $order->get_items() as $items ) {

$terms = wp_get_post_terms( $items->get_product_id(), 'product_cat' ); 

foreach( $terms as $term ) {
    echo '<li>';
    echo $term->name;
    echo ' - ';
    echo $term->count;
    echo '</li>';
    echo $term = count( $order->get_items() );
} 

}

Answer 1

The following will list the product categories within the WC Order with the count for each of them and at the end you will have the count of order items:

    $items = $order->get_items();// Get Order Items

    $terms = $term_ids = array(); // Initializing

    // Loop thriugh order items
    foreach( $items as $item ) {
        // Get the product categoory terms (array of WP_Term oblects)
        $item_terms = wp_get_post_terms( $item->get_product_id(), 'product_cat' ); 

        // Loop through the product category terms
        foreach( $item_terms as $term ) {
            $term_ids[] = $term->term_id; // add the term ID in an array
            $terms[ $term->term_id ] = $term->name; // array of term ids / term names pairs
        }
    }
    // Get an array with the count by term Id
    $terms_count = array_count_values( $term_ids );

    // Formatting for output
    $html = '<ul class="order-terms-count">';

    // loop through the terms count (array)
    foreach( $terms_count as $term_id => $count ) {
        // Format the term name with the count
        $html .= '<li>' . $terms[$term_id] . ' - ' . $count . '</li>';
    }

    // output
    echo '</ul>' . $html  . '<p>Order items - ' . count( $items ) . '</p>';

Tested and works.