how to print multiple array in joomla - php

Question

This is the cart array in the Virtuemart 2.0.22a ..
this is stored in "$cart"
how to print [virtuemart_product_id] => 21 at 4.
$cart=
VirtueMartCart Object
(
[products] => Array
(
[21] => stdClass Object
(
[virtuemart_manufacturer_id] => Array
(
)
[slug] => stylish-shirt
[published] => 1
[virtuemart_product_price] =>
[virtuemart_product_id] => 21
[virtuemart_shoppergroup_id] =>
[product_price] => 450.00000
[override] => 0
[product_override_price] => 0.00000
[product_tax_id] => -1
[product_discount_id] => -1
[product_currency] => 68
[virtuemart_vendor_id] => 1
[product_parent_id] => 0
[product_sku] =>
[product_name] => Stylish Shirt
[product_s_desc] =>
[product_weight] =>
[product_weight_uom] => KG
[product_length] =>
[product_width] =>
[product_height] =>
[product_lwh_uom] => M
[product_in_stock] => 0
[product_ordered] => 0
[product_sales] => 0
[product_unit] => KG
[product_packaging] =>
[min_order_level] =>
[max_order_level] =>
[virtuemart_media_id] => Array
(
[0] => 21
)
[step_order_level] =>
[image] => VmImage Object
(
[media_attributes] => 0
[setRole] =>
[file_name] => 3
[file_extension] => jpg
[virtuemart_media_id] => 21
[_foldersToTest:VmMediaHandler:private] => Array
(
[0] => E:\wamp\www\ecomm\images\stories\virtuemart\product\
[1] => E:\wamp\www\ecomm\images\stories\virtuemart\product\resized\
)
[_actions:VmMediaHandler:private] => Array
(
)
[_mLocation:VmMediaHandler:private] => Array
(
)
[_hidden:VmMediaHandler:private] => Array
(
)
[theme_url] => http://localhost/ecomm/components/com_virtuemart/
[virtuemart_vendor_id] => 1
[file_title] => 3.jpg
[file_description] =>
[file_meta] =>
[file_mimetype] => image/jpeg
[file_type] => product
[file_url] => images/stories/virtuemart/product/3.jpg
[file_url_thumb] => images/stories/virtuemart/product/resized/3_90x90.jpg
[published] => 1
[file_is_downloadable] => 0
[file_is_forSale] => 0
[file_is_product_image] => 0
[shared] => 0
[file_params] =>
[file_lang] =>
[_translatable] =>
[_tablePreFix] =>
[created_on] => 2013-08-12 12:32:19
[created_by] => 572
[modified_on] => 2013-08-12 12:38:50
[modified_by] => 572
[file_url_folder] => images/stories/virtuemart/product/
[file_path_folder] => images\stories\virtuemart\product\
[file_url_folder_thumb] => images/stories/virtuemart/product/resized/
[media_role] => file_is_displayable
[file_name_thumb] => 3_90x90
)
[categories] => Array
(
[0] => 6
)
[virtuemart_category_id] => 6
[category_name] => Shirts
[link] => /ecomm/index.php/component/virtuemart/shirts/stylish-shirt-detail?Itemid=0
[packaging] =>
[quantity] => 1
)
)
[_inCheckOut] =>
[_dataValidated] =>
[_blockConfirm] =>
[_confirmDone] =>
[_redirect] =>
[_redirect_disabled] =>
[_lastError] =>
[vendorId] => 1
[lastVisitedCategoryId] => 0
[virtuemart_shipmentmethod_id] => 0
[virtuemart_paymentmethod_id] => 1
[automaticSelectedShipment] => 1
[automaticSelectedPayment] => 1
[BT] => 0
[ST] => 0
[tosAccepted] =>
[customer_comment] =>
[couponCode] =>
[order_language] =>
[cartData] => Array
(
[VatTax] => Array
(
)
[duty] => 1
[payment] => 0
[paymentName] =>

Answer 1

Finally i got the output.. after lot of struggles
foreach($cart->products as $cur)
{
echo $cur->virtuemart_product_id;
}