在WooCommerce中跟踪脸书像素的添加购物车和提交订单

function add_facebook_pixel() {
    ?>
    <!-- Facebook Pixel Code -->
    <script>
        !function(f,b,e,v,n,t,s)
        {if(f.fbq)return;n=f.fbq=function(){n.callMethod?
        n.callMethod.apply(n,arguments):n.queue.push(arguments)};
        if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
        n.queue=[];t=b.createElement(e);t.async=!0;
        t.src=v;s=b.getElementsByTagName(e)[0];
        s.parentNode.insertBefore(t,s)}(window, document,'script',
        'https://connect.facebook.net/en_US/fbevents.js');
        fbq('init', 'YOUR_PIXEL_ID_HERE');
        fbq('track', 'PageView');
    </script>
    <noscript>
        <img height="1" width="1" src="https://www.facebook.com/tr?id=YOUR_PIXEL_ID_HERE&ev=PageView&noscript=1"/>
    </noscript>
    <!-- End Facebook Pixel Code -->
    <?php
}
add_action('wp_head', 'add_facebook_pixel');

add_action('woocommerce_add_to_cart', 'track_add_to_cart_event');
function track_add_to_cart_event() {
    if (function_exists('fbq')) {
        global $woocommerce;
        $product_id = apply_filters('woocommerce_add_to_cart_product_id', absint($_POST['add-to-cart']));
        $product_name = get_the_title($product_id);
        $quantity = absint($_POST['quantity']);
        $price = get_post_meta($product_id, '_regular_price', true);
        fbq('trackCustom', 'AddToCart', {
            'content_name': $product_name,
            'content_category': '',
            'content_ids': [$product_id],
            'content_type': 'product',
            'value': $price,
            'currency': get_woocommerce_currency(),
            'quantity': $quantity
        });
    }
}

add_action('woocommerce_thankyou', 'track_purchase_event', 10, 1);
function track_purchase_event($order_id) {
    if (function_exists('fbq')) {
        $order = wc_get_order($order_id);
        $items = $order->get_items();
        $total = $order->get_total();
        $currency = $order->get_currency();
        $items_data = [];
        foreach ($items as $item_key => $item) {
            $product = $item->get_product();
            $items_data[] = [
                'id' => $product->get_id(),
                'name' => $product->get_name(),
                'price' => $product->get_price(),
                'quantity' => $item->get_quantity()
            ];
        }
        fbq('track', 'Purchase', [
            'value': $total,
            'currency': $currency,
            'content_type': 'product',
            'content_ids': array_column($items_data, 'id'),
            'items': $items_data
        ]);
    }
}