Notes

<?php
//Check if is homepage
$woo_prefix = '';/* Merchant center prefix for products*/
global $woocommerce;
$is_sku = false; /*If sku is used in merchant center change $is_sku variable to true*/
if ( is_front_page() ) {
?>

<script type="text/javascript">

//initializing the variable (declared)
var dataLayer = window.dataLayer || [];

dataLayer.push({
'event': 'fireRemarketingTag',
'google_tag_params': {
'ecomm_pagetype': 'home'
}
});
</script>

<?php
}
// Check if it is a product category page and set the category parameters.
elseif ( is_product_category() ) {
?>

<script type="text/javascript">
var dataLayer = window.dataLayer || [];

dataLayer.push({
'event': 'fireRemarketingTag',
'google_tag_params': {
'ecomm_pagetype': 'category'
}
});
</script>
<?php
}
// Check if it a search results page and set the searchresults parameters.
elseif ( is_search() ) {
?>

<script type="text/javascript">
var dataLayer = window.dataLayer || [];

dataLayer.push({
'event': 'fireRemarketingTag',
'google_tag_params': {
'ecomm_pagetype': 'searchresults'
}
});
</script>
<?php
}
// Check if it is a product page and set the product parameters.
elseif ( is_product() ) {
$product_id = get_the_ID();
$product = wc_get_product($product_id);
if($is_sku){
$product_id = $woo_prefix.$product->get_sku();
}
else{
$product_id = $woo_prefix.$product->id;
}
$price = $product->get_price();
?>
<script type="text/javascript">

var dataLayer = window.dataLayer || [];

dataLayer.push({
'event': 'fireRemarketingTag',
'google_tag_params': {
'ecomm_prodid': '<?php echo $product_id ?>',
'ecomm_pagetype': 'product',
'ecomm_totalvalue': <?php echo $price ?>
}
});
</script>
<?php

}
// Check if it is the cart page and set the cart parameters.
elseif ( is_cart() ) {
$cartprods = $woocommerce->cart->get_cart();
$cartprods_items = array();
foreach ( (array) $cartprods as $entry ) {
if($is_sku){
$sku = $entry['data']->get_sku();
//echo "SKU is ".$woo_prefix.$sku;
array_push( $cartprods_items, "'".$woo_prefix.$sku."'" );
}
else{
array_push( $cartprods_items, "'".$woo_prefix.$entry['product_id']."'" );
}
}
?>

<script type="text/javascript">

var dataLayer = window.dataLayer || [];

dataLayer.push({
'event': 'fireRemarketingTag',
'google_tag_params': {
'ecomm_prodid': <?php echo '['.implode(',',$cartprods_items).']';?>,
'ecomm_pagetype': 'cart',
'ecomm_totalvalue': <?php echo $woocommerce->cart->cart_contents_total; ?>
}
});
</script>
<?php
}
// Check if it the order received page and set the according parameters
elseif ( is_order_received_page() ) {

$order_key = $_GET['key'];
$order = new WC_Order( wc_get_order_id_by_order_key( $order_key ) );
$order_total = $order->get_total();

// Only run conversion script if the payment has not failed. (has_status('completed') is too restrictive)
// And use the order meta to check if the conversion code has already run for this order ID. If yes, don't run it again.
if ( ! $order->has_status( 'failed' )) {
$order_items = $order->get_items();
$order_items_array = array();
foreach ( (array) $order_items as $item ) {
if($is_sku){
$product = new WC_Product($item['product_id']);
$sku = $product->get_sku();
array_push( $order_items_array, "'".$woo_prefix.$sku."'" );
}
else{
array_push( $order_items_array, "'".$woo_prefix.$item['product_id']."'" );
}
}
?>

<script type="text/javascript">

var dataLayer = window.dataLayer || [];

dataLayer.push({
'event': 'fireRemarketingTag',
'google_tag_params': {
'ecomm_prodid': <?php echo '['.implode(',',$order_items_array).']';?>,
'ecomm_pagetype': 'purchase',
'ecomm_totalvalue': <?php echo $order_total; ?>
}
});
</script>
<?php
} // end if order status
}
// For all other pages set the parameters for other.
else {
?>
<script type="text/javascript">

var dataLayer = window.dataLayer || [];

dataLayer.push({
'event': 'fireRemarketingTag',
'google_tag_params': {
'ecomm_pagetype': 'other'
}
});
</script>
<?php
}
?>