FriendBuy Conversion Tracker

friendbuy_conversion_tracker

<?php
/**
 * Friendbuy conversion tracker
 *
 */
function friendbuy_conversion_tracker( $order_id ) {
	// Lets grab the order
	$order = new WC_Order( $order_id );
	?>
	<script>
	    window['friendbuy'] = window['friendbuy'] || [];
	    window['friendbuy'].push(['track', 'order',
	        {
	            id: '<?php echo $order->get_order_number(); ?>',
	            amount: '<?php echo $order->get_total(); ?>',
	            email: '<?php echo $order->billing_email; ?>'
	        }
	    ]);
	    window['friendbuy'].push(['track', 'products', [
		<?php
		$count = 0;
		foreach( $order->get_items() as $item_id => $item ) {
			$count++;
			$product = $order->get_product_from_item( $item ); ?>
	        {
	            sku: '<?php echo $product->get_sku(); ?>',
	            price: '<?php echo $order->get_line_subtotal($item); ?>',
	            quantity: '<?php echo $item['qty']; ?>'
	        }<?php if ( count( $order->get_items() ) > $count ) { echo ","; } ?>
		<?php } ?>
	   ]]);
	</script>
	<?php
	}
add_action( 'woocommerce_thankyou', 'friendbuy_conversion_tracker' );

We used the boilerplate code on http://docs.friendbuy.com/article/85-woocommerce but got two PHP errors:

Notice: Indirect modification of overloaded property WC_Order::$items has no effect in [filename]
Warning: end() expects parameter 1 to be array, string given in [filename]

The issue was this line:

<?php if ($item !== end($order->items)) { echo ","; } ?>

Fixed with by using a $count variable and:

<?php if ( count( $order->get_items() ) > $count ) { echo ","; } ?>