woocommerce change price while add to cart

Question

i have a one product 1€ and use e GET parameter to change the price at runtime:

http://url/warenkorb/?add-to-cart=1539&price=18.45

This change not the price

Answer 1

Its not working for me, i modified to modify price passed by a parameter

spainbox.com/carro/?add-to-cart=28792&shippingprice=141

Product have a price of 1 euro, and i need to add to cart this product because its a service that will have the price of the shipping cost

adjust_price( $extra_cost );
        // here the real adjustment is going on...

    endif;

    return $cart_item;

}

add_filter( 'woocommerce_add_cart_item_data', 'c_other_options_add_cart_item_data', 10, 2 );
function c_other_options_add_cart_item_data($cart_item_meta, $product_id){
    global $woocommerce;

    $product = new WC_Product( $product_id);
    $price = $product->price;

    if(empty($cart_item_meta['_other_options']))
        $cart_item_meta['_other_options'] = array();

    $cart_item_meta['_other_options']['product-price'] = esc_attr($_REQUEST['shippingprice']);

// as woocommerce allows to adjust the price (i don't know if there is any way to reset it, but this procedure works), we need to return the adjustable price

    return $cart_item_meta;
}
?>