The problem
Sometimes you need the functionality of a shopping cart without forcing your customer to interact with your web site in the traditional way of a e-commerce.
For example let’s say you have a sample product that you just want automatically added to a shopping cart, so your customers can just click on let say “try product” and then be taken directly to a checkout process. This only applies to woocommerce, however the approach may be similar to other e-commerce toolkits.
This example is a modification from the woocommerce documentation.
Requirements:
| # | Requirement detail |
|
1 |
A Product x is automatically added to a shopping cart when a non-logged in customer visits your site. This forces a visitor to register when they do checkout |
|
2 |
Remove a product if the users is logged in |
|
3 |
The site “try now” button is a link to “check out”, where the web site collects customers billing/shipping information. |
These requirements allow a web site to collect customer billing information taking advantage of the built-in woocommerce logic.
Implementation:
- Go to your wordpress admin page usually under https://[your-web-site]/wp-admin/
- We are going to use the SKU to do a lookup in this case is L3-670115
-
When your customers visit your site the product is going to be in their shopping cart , ready to checkout
- And here is the code, this needs to be visible in your functions.php file. But that you already knew it.
-
add_action(‘wp_loaded’, ‘add_product_to_cart’);
function add_product_to_cart()
{if (!is_admin()) {
$product_id = wc_get_product_id_by_sku(‘L3-670115’);
$found = false;
if (is_user_logged_in()) {
if (sizeof(WC()->cart->get_cart()) > 0) {
foreach (WC()->cart->get_cart() as $cart_item_key => $values) {
$_product = $values[‘data’];
if ($_product->id == $product_id)
WC()->cart->remove_cart_item($cart_item_key);
}
}
} else {
if (sizeof(WC()->cart->get_cart()) > 0) {
foreach (WC()->cart->get_cart() as $cart_item_key => $values) {
$_product = $values[‘data’];
if ($_product->id == $product_id)
$found = true;
}
// if product not found, add it
if (!$found)
WC()->cart->add_to_cart($product_id);
} else {
// if no products in cart, add it
WC()->cart->add_to_cart($product_id);
}
}
}
}
Hope you enjoy.