wp wc php remove product from cart if amount is 0

You can use the following code to remove a product from the cart if the amount is 0 in WordPress/WooCommerce:

add_action( 'woocommerce_before_calculate_totals', 'remove_product_from_cart_if_amount_zero' );

function remove_product_from_cart_if_amount_zero( $cart ) {
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
        if ( $cart_item['quantity'] == 0 ) {
            $cart->remove_cart_item( $cart_item_key );
        }
    }
}

Explanation: 1. We use the woocommerce_before_calculate_totals action hook to call the remove_product_from_cart_if_amount_zero function before calculating the cart totals. 2. Inside the remove_product_from_cart_if_amount_zero function, we iterate through each item in the cart using a foreach loop. 3. We then check if the quantity of the cart item is 0, and if so, we use the remove_cart_item method to remove the item from the cart.

Remember to test this code thoroughly before implementing it on a live site.