function UseCase1()
{
// Create a new shopping cart object
$merchant_id = "";
// Your Merchant ID
$merchant_key = "";
// Your Merchant Key
$server_type = "sandbox";
$currency = "USD";
$cart = new GoogleCart($merchant_id, $merchant_key, $server_type, $currency);
// Add items to the cart
$item_1 = new GoogleItem("MegaSound 2GB MP3 Player", "Portable MP3 player - stores 500 songs", 1, 175.49);
// Unit price
$item_2 = new GoogleItem("AA Rechargeable Battery Pack", "Battery pack containing four AA rechargeable batteries", 1, 11.59);
// Unit price
$cart->AddItem($item_1);
$cart->AddItem($item_2);
// Add US shipping options
$ship_1 = new GoogleFlatRateShipping("UPS Ground", 5.0);
$restriction_1 = new GoogleShippingFilters();
$restriction_1->SetAllowedCountryArea("CONTINENTAL_48");
$ship_1->AddShippingRestrictions($restriction_1);
$ship_2 = new GoogleFlatRateShipping("UPS 2nd Day", 10.0);
$restriction_2 = new GoogleShippingFilters();
$restriction_2->SetAllowedStateAreas(array("CA", "AZ", "CO", "WA", "OR"));
$ship_2->AddShippingRestrictions($restriction_2);
// Add international shipping options
$ship_3 = new GoogleFlatRateShipping("Canada 3 Business Days", 5.0);
$restriction_3 = new GoogleShippingFilters();
$restriction_3->AddAllowedPostalArea("CA");
$restriction_3->SetAllowUsPoBox("false");
$ship_3->AddShippingRestrictions($restriction_3);
$ship_4 = new GoogleFlatRateShipping("Europe 3 Business Days", 10.0);
$restriction_4 = new GoogleShippingFilters();
$restriction_4->AddAllowedPostalArea("GB", "SW*");
$ship_4->AddShippingRestrictions($restriction_4);
$cart->AddShipping($ship_1);
$cart->AddShipping($ship_2);
$cart->AddShipping($ship_3);
$cart->AddShipping($ship_4);
// Add US tax rules
$tax_rule_1 = new GoogleDefaultTaxRule(0.0825);
$tax_rule_1->SetStateAreas(array("CA", "NY"));
$cart->AddDefaultTaxRules($tax_rule_1);
// Add International tax rules
$tax_rule_2 = new GoogleDefaultTaxRule(0.15);
$tax_rule_2->AddPostalArea("GB");
$tax_rule_2->AddPostalArea("FR");
$tax_rule_2->AddPostalArea("DE");
$cart->AddDefaultTaxRules($tax_rule_2);
// Define rounding policy
$cart->AddRoundingPolicy("HALF_UP", "PER_LINE");
// Display XML data
// echo "<pre>";
// echo htmlentities($cart->GetXML());
// echo "</pre>";
// Display Google Checkout button
echo $cart->CheckoutButtonCode("LARGE");
}
