php - How to send specific line item data to third party script

I'm trying to send price, name and id of each item in the order, plus an extra static value to a single js variable formatted in this way,

items = eventID::price::name|eventID::price::name|eventID::price::name

I was trying to do it this way, but I'm getting an error on the last line which I mean to add a pipe if there is more than one product.

$line_items = $order->get_items();

//loop over line items
$wgItemCount = $order->get_item_count();

$wgItems = array();   
foreach ( $line_items as $item ) {
    $wgItem = array();
    $wgItem ['eventId'] = '777777';
    $wgItem ['eventId'] .= '::';
    $wgItem ['price'] = $order->get_line_total( $item, true, true );
    $wgItem ['price'] .= '::';
    $wgItem ['name'] = $item->get_name();
    if ($wgItemCount > 1) { //add divider if more than one item
        wgItem .= '|';
    } 
    
    $wgItems[] = $wgItem;
}
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That hasn't worked so far, so I thought maybe I should create a custom object that contains the variables instead:

wgProduct = "77777", $order->get_line_total( $item, true, true ), $item->get_name();
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and then call the items in a list later like

echo print ("|", wgProduct) 
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I had also tried using JSON to encode the data but the third party told me that is not going to work for their needs.

Edit: Code is now doing everything I need it to, but it's only pulling one item from the list instead of a string of all of them.

Here's what it looks like now based on the help I got here:

add_action( 'woocommerce_thankyou','wg_tracking' );

function wg_tracking( $order_id ) {
    $order = wc_get_order( $order_id );
    
    $shipping_total =  $order->get_shipping_total();
    $order_total = $order->get_total();
    $currency = $order->get_currency();
    $coupons = $order->get_coupon_codes();
    $items = $order->get_items();
    $total_exc_shipping = $order_total - $shipping_total;
    $order_discount = $order->discount_total;
    
    foreach( $coupons as $coupon ){
        $coupon_post_object = get_page_by_title($coupon, OBJECT, 'shop_coupon');
        $coupon_id = $coupon_post_object->ID;

        $coupon = new WC_Coupon($coupon_id);
    }
    
    $wgItems = array();   
    
    foreach ( $items as $item ) {
        $line = '';
        $line .= '77777';
        $line.= '::' . $order->get_line_total( $item, true, true );
        $line .= '::' . $item->get_name();
        $line .= '::' . $item->get_id();
        }
    $wgItems[] = $line;
    $itemsList = implode('|', $wgItems);    
?>
<script>
     (function(w,e,b,g,a,i,n,s){w['ITCVROBJ']=a;w[a]=w[a]||function(){
        (w[a].q=w[a].q||[]).push(arguments)},w[a].l=1*new Date();i=e.createElement(b),
        n=e.getElementsByTagName(b)[0];i.async=1;i.src=g;n.parentNode.insertBefore(i,n)
    })(window,document,'script','https://analytics.webgains.io/cvr.min.js','ITCVRQ');
    ITCVRQ('set', 'trk.programId', 88888);
    ITCVRQ('set', 'cvr', {
        value: '<?php echo $total_exc_shipping ?>',
        currency: '<?php echo $currency ?>',
        language: 'de_DE',
        eventId: 77777,
        orderReference : '<?php echo $order_id ?>',
        comment: '',
        multiple: '',
        checksum: '',
        items:  '<?php echo $itemsList ?>',
        voucherId: '<?php if ( $order_discount > 0 ) echo $coupon->get_code(); ?>'
    });
    ITCVRQ('conversion');
</script>
<?php
}
?>
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