I want to add datalayer.push on WordPress functions.php, I tried the following code but it throws an error, Uncaught Error: Call to a member function get_id() on string...
add_action('wp_head', 'datalayer_push');
function datalayer_push($product) {
?>
<script>
window.dataLayer = window.dataLayer || [];
dataLayer.push({
'itemId': '<?php echo $product->get_id(); ?>'
});
</script>
<?php
}
How to implement the datalayer.push code properly on functions.php?
You've got an error because there's no $product variable in the wp_head by default. To make your code work, you have to rewrite it like this:
add_action('wp_head', 'datalayer_push');
function datalayer_push($product) {
// Do not do anything if the current page is not a single product page
if ( ! is_product() ) {
return;
}
global $post;
$product_id = $post->ID;
$product = wc_get_product( $product_id );
?>
<script>
window.dataLayer = window.dataLayer || [];
dataLayer.push({
'itemId': '<?php echo $product->get_id(); ?>'
});
</script>
<?php
}