Woocommerce: Tag Manager - Thankyou page tracking code

woocommerce-tagmanager-thankyou-page-code.php

<?php if (is_order_received_page()) { 
		$order_id = wc_get_order_id_by_order_key( $_GET['key'] );
		$order = wc_get_order( $order_id );
		$cookie_name = "order_data_sent";
		$cookie_value = $order_id;
		
		$transaction_id = ($order->transaction_id ? $order->transaction_id : $order_id); 
		$total = $order->total;
		$total_tax = $order->total_tax; 
		$shipping_method = @array_shift($order->get_shipping_methods());
		$shipping_method_id = $shipping_method['method_id']; ?>

		<script>
			var arr = [
				<?php foreach( $order->get_items() as $item_id => $item ){ ?>
					<?php $product_id = $item->get_product_id(); 
					$product = $item->get_product();
					$product_qty = $item->get_quantity();
					$product_name = $item->get_name();
					$sku = $product->get_sku(); 
					$price = $product->get_price(); 
					$terms = get_the_terms( $product_id, 'product_cat' ); ?>
					{
						'sku': '<?php echo $sku; ?>',
						'name': '<?php echo $product_name; ?>',
						'category': '<?php foreach ( $terms as $term ) {
							$product_cat_title = $term->name;
							echo $product_cat_title . ', ';
						} ?>',
						'price': '<?php echo $price; ?>',
						'quantity': '<?php echo $product_qty; ?>'
					},
				<?php } ?>
			];

			// console.log(arr);
			// console.log('<?php echo $shipping_method_id; ?>');
		</script>
			<?php if( isset($_COOKIE[$cookie_name] ) && $_COOKIE[$cookie_name] == $order_id ) { ?>
				<script>// console.log('cookie: <?php echo $_COOKIE[$cookie_name]; ?>');</script>
			<?php } else { ?>
				<script>
					console.log('cookies already set');
					window.dataLayer = window.dataLayer || []
					dataLayer.push({
						'event': 'purchase',
						'transactionId': '<?php echo $order_id; ?>',
						'transactionAffiliation': 'inweb.ua', 
						'transactionTotal': '<?php echo $total; ?>',
						'transactionTax': '<?php echo $total_tax; ?>',
						'transactionShipping': '<?php echo $shipping_method_id; ?>',
						'transactionProducts': [
							<?php foreach( $order->get_items() as $item_id => $item ){ ?>
								<?php $product_id = $item->get_product_id(); 
								$product = $item->get_product();
								$product_qty = $item->get_quantity();
								$product_name = $item->get_name();
								$sku = $product->get_sku(); 
								$price = $product->get_price(); 
								$terms = get_the_terms( $product_id, 'product_cat' ); ?>
								{
									'sku': '<?php echo $sku; ?>', 
									'name': '<?php echo $product_name; ?>',
									'category': '<?php foreach ( $terms as $term ) {
										$product_cat_title = $term->name;
										echo $product_cat_title . ' ';
									} ?>',
									'price': '<?php echo $price; ?>',
									'quantity': '<?php echo $product_qty; ?>'
								},
							<?php } ?>
						]
					});
				</script> 
			<?php 
			setcookie($cookie_name, $cookie_value, time() + (86400 * 3000), "/");
		} ?>
			
	<?php } ?>