php - How can I implode an array of item details for each order item in Woocommerce?

Solution:

There are some mistakes and complications in your code, try the following instead (commented):

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_coupons(); // Get an array of WC_Coupon objects

    // Loop through the array of WC_Coupon Objects
    foreach( $coupons as $coupon ){
        // Do something with $coupon variable (WC_Coupon object)
        $coupon_code = $coupon->get_code(); // Get coupon code
    }

    $total_exc_shipping = $order_total - $shipping_total;
    $order_discount = $order->get_discount_total();
    
    $wgItems = array(); // Initializing
    
    // Loop through order "line items"
    foreach ( $order->get_items() as $item ) {
        $wgProduct = ''; // Initializing
        $wgProduct .= '777777';
        $wgProduct .= '::' . $order->get_line_total( $item, true, true );
        $wgProduct .= '::' . $item->get_name();
        $wgProduct .= '::' . $item->get_id(); // <== That is the item Id which has nothing to do with the product id: $item->get_product_id();
    
        $wgItems[] = $wgProduct; // <== Moved inside the foreach loop
    }
    $wgItemsList = implode('|', $wgItems); // Now this works
    
    ?>
    <script>
       var items = '<?php echo $wgItemsList ?>'; //this is where i want to call the items in a string
    </script>

}
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Now it will work.

Note: to get the product id from an order item useget_product_id(), but notget_id() which gives theitem_id as recorded on the related database tables.

Related:

• Get Order items and WC_Order_Item_Product in WooCommerce 3
• https://stackoverflow.com/a/44708344/3730754

Solution:

Have you tried the following? Assign the stored values to $wgItems array inside the loop. This should fix it on a quick look

foreach ( $items as $item ) {

    $wgProduct = '';
    $wgProduct .= '777777';
    $wgProduct .= '::' . $order->get_line_total( $item, true, true );
    $wgProduct .= '::' . $item->get_name();
    $wgProduct .= '::' . $item->get_id();
    $wgItems[] = $wgProduct;
    }
    
    $wgItemsList = implode('|', $wgItems); //this is where the problem is, I think
    
?>
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